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.
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This problem is limited to installations using the\next_lm_group_acl binary.\n\n## Affected Versions\n\nSquid 2.x -> 2.7.STABLE9\nSquid 3.x -> 3.5.28\nSquid 4.x -> 4.9\n\n## Severity \n\nDue 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. Resulting in the Squid process also terminating and a denial of service for all clients using the proxy.\n\n## Supporting Material/References:\n\nAdvisory : http://www.squid-cache.org/Advisories/SQUID-2020_3.txt\n\n## Remediation\n\nAn official patch is available from the Squid archives for both Squid 3.5 and Squid 4. \n\n## Timeline\n\n2019-11-11 : I reported the issue\n2019-11-18 : I made a PR on GitHub with a fix\n2019-11-22 : Fix was merged\n\n## Impact\n\nSee 'Severity' section of report.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-02-04T21:58:53", "type": "hackerone", "title": "Internet Bug Bounty: Buffer Overflow in ext_lm_group_acl helper", "bulletinFamily": "bugbounty", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-8517"], "modified": "2021-07-28T18:44:41", "id": "H1:789034", "href": "https://hackerone.com/reports/789034", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "openvas": [{"lastseen": "2020-06-03T15:43:21", "description": "The remote host is missing an update for the Huawei EulerOS\n ", "cvss3": {}, "published": "2020-05-26T00:00:00", "type": "openvas", "title": "Huawei EulerOS: Security Advisory for squid (EulerOS-SA-2020-1591)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-8450", "CVE-2020-8517", "CVE-2020-8449"], "modified": "2020-05-29T00:00:00", "id": "OPENVAS:1361412562311220201591", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562311220201591", "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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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": {"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": "2021-06-10T00:00:00", "type": "nessus", "title": "SUSE SLES11 Security Update : squid3 (SUSE-SU-2020:14460-1)", "bulletinFamily": "scanner", "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-2019-12525", "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. The text itself\n# is copyright (C) SUSE.\n##\n\ninclude('deprecated_nasl_level.inc');\ninclude('compat.inc');\n\nif (description)\n{\n script_id(150657);\n script_version(\"1.3\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2022/05/09\");\n\n script_cve_id(\n \"CVE-2019-12519\",\n \"CVE-2019-12520\",\n \"CVE-2019-12521\",\n \"CVE-2019-12523\",\n \"CVE-2019-12524\",\n \"CVE-2019-12525\",\n \"CVE-2019-12526\",\n \"CVE-2019-12528\",\n \"CVE-2019-12529\",\n \"CVE-2019-13345\",\n \"CVE-2019-18676\",\n \"CVE-2019-18677\",\n \"CVE-2019-18678\",\n \"CVE-2019-18679\",\n \"CVE-2019-18860\",\n \"CVE-2020-8449\",\n \"CVE-2020-8450\",\n \"CVE-2020-8517\",\n \"CVE-2020-11945\",\n \"CVE-2020-14059\",\n \"CVE-2020-15049\"\n );\n script_xref(name:\"SuSE\", value:\"SUSE-SU-2020:14460-1\");\n\n script_name(english:\"SUSE SLES11 Security Update : squid3 (SUSE-SU-2020:14460-1)\");\n\n script_set_attribute(attribute:\"synopsis\", value:\n\"The remote SUSE host is missing one or more security updates.\");\n script_set_attribute(attribute:\"description\", value:\n\"The remote SUSE Linux SLES11 host has a package installed that is affected by multiple vulnerabilities as referenced in\nthe SUSE-SU-2020:14460-1 advisory.\n\n - An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid\n calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's\n being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a\n new member to the stack. When adding a new member, there is no check to ensure that the stack won't\n overflow. (CVE-2019-12519)\n\n - An issue was discovered in Squid through 4.7 and 5. 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 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use\n Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as\n domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it\n performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote\n (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\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. 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. (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\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. 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Due to incorrect input validation, the NTLM authentication\n credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with\n memory access protections, this can result in the helper process being terminated unexpectedly. 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\"Host/SuSE/rpm-list\");\n\n exit(0);\n}\n\n\ninclude('audit.inc');\ninclude('global_settings.inc');\ninclude('misc_func.inc');\ninclude('rpm.inc');\n\nif (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);\nrelease = get_kb_item(\"Host/SuSE/release\");\nif (isnull(release) || release !~ \"^(SLED|SLES)\") audit(AUDIT_OS_NOT, \"SUSE\");\nos_ver = pregmatch(pattern: \"^(SLE(S|D)\\d+)\", string:release);\nif (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');\nos_ver = os_ver[1];\nif (! preg(pattern:\"^(SLES11)$\", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES11', 'SUSE ' + os_ver);\n\nif (!get_kb_item(\"Host/SuSE/rpm-list\")) audit(AUDIT_PACKAGE_LIST_MISSING);\n\ncpu = get_kb_item('Host/cpu');\nif (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);\nif ('x86_64' >!< cpu && cpu !~ \"^i[3-6]86$\" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE ' + os_ver, cpu);\n\nsp = get_kb_item(\"Host/SuSE/patchlevel\");\nif (isnull(sp)) sp = \"0\";\nif (os_ver == \"SLES11\" && (! preg(pattern:\"^(4)$\", string:sp))) audit(AUDIT_OS_NOT, \"SLES11 SP4\", os_ver + \" SP\" + sp);\n\npkgs = [\n {'reference':'squid3-3.1.23-8.16.37.12', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},\n {'reference':'squid3-3.1.23-8.16.37.12', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'}\n];\n\nflag = 0;\nforeach package_array ( pkgs ) {\n reference = NULL;\n release = NULL;\n sp = NULL;\n cpu = NULL;\n exists_check = NULL;\n rpm_spec_vers_cmp = NULL;\n if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];\n if (!empty_or_null(package_array['release'])) release = package_array['release'];\n if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];\n if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];\n if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];\n if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];\n if (reference && release && exists_check) {\n if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;\n }\n else if (reference && release) {\n if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;\n }\n}\n\nif (flag)\n{\n ltss_plugin_caveat = '\\n' +\n 'NOTE: This vulnerability check contains fixes that apply to\\n' +\n 'packages only available in SUSE Enterprise Linux Server LTSS\\n' +\n 'repositories. 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": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "freebsd": [{"lastseen": "2022-01-19T15:51:31", "description": "\n\nThe Squid developers reports:\n\nImproper Input Validation issues in HTTP Request\n\t processing (CVE-2020-8449, CVE-2020-8450).\nInformation Disclosure issue in FTP Gateway\n\t (CVE-2019-12528).\nBuffer Overflow issue in ext_lm_group_acl helper\n\t (CVE-2020-8517).\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 3.6}, "published": "2020-02-10T00:00:00", "type": "freebsd", "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"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-02-10T00:00:00", "id": "57C1C2EE-7914-11EA-90BF-0800276545C1", "href": "https://vuxml.freebsd.org/freebsd/57c1c2ee-7914-11ea-90bf-0800276545c1.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "suse": [{"lastseen": "2022-11-09T21:01:53", "description": "An update that fixes four vulnerabilities is now available.\n\nDescription:\n\n This update for squid to version 4.10 fixes the following issues:\n\n Security issues fixed:\n\n - CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway\n (bsc#1162689).\n - CVE-2020-8449: Fixed a buffer overflow when squid is acting as\n reverse-proxy (bsc#1162687).\n - CVE-2020-8450: Fixed a buffer overflow when squid is acting as\n reverse-proxy (bsc#1162687).\n - CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when\n processing NTLM Authentication credentials (bsc#1162691).\n\n Non-security issue fixed:\n\n - Improved cache handling with chunked responses.\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-2020-307=1", "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": "2020-03-06T00:00:00", "type": "suse", "title": "Security update for squid (moderate)", "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-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-03-06T00:00:00", "id": "OPENSUSE-SU-2020:0307-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/OSBD4IUE3J32BEBGOTEFYZCO2BC6SOBD/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2022-11-06T19:35:27", "description": "An update that fixes four vulnerabilities is now available.\n\nDescription:\n\n This update for squid to version 4.10 fixes the following issues:\n\n Security issues fixed:\n\n - CVE-2019-12528: Fixed an information disclosure flaw in the FTP gateway\n (bsc#1162689).\n - CVE-2020-8449: Fixed a buffer overflow when squid is acting as\n reverse-proxy (bsc#1162687).\n - CVE-2020-8450: Fixed a buffer overflow when squid is acting as\n reverse-proxy (bsc#1162687).\n - CVE-2020-8517: Fixed a buffer overflow in ext_lm_group_acl when\n processing NTLM Authentication credentials (bsc#1162691).\n\n Non-security issue fixed:\n\n - Improved cache handling with chunked responses.\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-2020-606=1", "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": "2020-05-03T00:00:00", "type": "suse", "title": "Security update for squid (moderate)", "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-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-05-03T00:00:00", "id": "OPENSUSE-SU-2020:0606-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/AGFVFRNFEBM5GAYSO2Y6EUODQ7XBSWE3/", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"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"}}], "mageia": [{"lastseen": "2022-04-18T11:19:34", "description": "Updated squid packages fix security vulnerabilities: Jeriko One discovered that Squid incorrectly handled memory when connected to an FTP server. A remote attacker could possibly use this issue to obtain sensitive information from Squid memory (CVE-2019-12528). Regis Leroy discovered that Squid incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to access server resources prohibited by earlier security filters (CVE-2020-8449). Guido Vranken discovered that Squid incorrectly handled certain buffer operations when acting as a reverse proxy. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code (CVE-2020-8450). Aaron Costello discovered that Squid incorrectly handled certain NTLM authentication credentials. A remote attacker could possibly use this issue to cause Squid to crash, resulting in a denial of service (CVE-2020-8517). \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": "2020-02-26T10:21:01", "type": "mageia", "title": "Updated squid packages fix security vulnerabilities\n", "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-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-02-26T10:21:01", "id": "MGASA-2020-0106", "href": "https://advisories.mageia.org/MGASA-2020-0106.html", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "ubuntu": [{"lastseen": "2023-01-26T15:40:41", "description": "## Releases\n\n * Ubuntu 19.10 \n * Ubuntu 18.04 LTS\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 memory when connected \nto an FTP server. A remote attacker could possibly use this issue to obtain \nsensitive information from Squid memory. (CVE-2019-12528)\n\nRegis Leroy discovered that Squid incorrectly handled certain HTTP \nrequests. A remote attacker could possibly use this issue to access server \nresources prohibited by earlier security filters. (CVE-2020-8449)\n\nGuido Vranken discovered that Squid incorrectly handled certain buffer \noperations when acting as a reverse proxy. A remote attacker could use \nthis issue to cause Squid to crash, resulting in a denial of service, or \npossibly execute arbitrary code. (CVE-2020-8450)\n\nAaron Costello discovered that Squid incorrectly handled certain NTLM \nauthentication credentials. A remote attacker could possibly use this issue \nto cause Squid to crash, resulting in a denial of service. (CVE-2020-8517)\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": "2020-02-20T00:00:00", "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-2019-12528", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-02-20T00:00:00", "id": "USN-4289-1", "href": "https://ubuntu.com/security/notices/USN-4289-1", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "gentoo": [{"lastseen": "2022-01-17T19:02:32", "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\nA remote attacker, by sending a specially crafted request, could possibly execute arbitrary code with the privileges of the process, obtain sensitive information or cause a Denial of Service condition. \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-4.10\"", "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": "2020-03-16T00:00:00", "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"}, "acInsufInfo": false, "impactScore": 6.4, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-12526", "CVE-2019-12528", "CVE-2019-18678", "CVE-2019-18679", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-03-16T00:00:00", "id": "GLSA-202003-34", "href": "https://security.gentoo.org/glsa/202003-34", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "altlinux": [{"lastseen": "2022-06-10T03:05:49", "description": "4.10-alt1 built March 16, 2020 Alexey Shabalin in task [#247850](<https://git.altlinux.org/tasks/247850/>) \n--- \nMarch 14, 2020 Alexey Shabalin \n \n \n - Updated to 4.10.\n - Fixes:\n + CVE-2019-12526 Heap Overflow issue in URN processing.\n + CVE-2019-12523 Multiple issues in URI processing.\n + CVE-2019-18676 Multiple issues in URI processing.\n + CVE-2019-18677 Cross-Site Request Forgery issue in HTTP Request processing.\n + CVE-2019-18678 HTTP Request Splitting issue in HTTP message processing.\n + CVE-2019-18679 Information Disclosure issue in HTTP Digest Authentication.\n + CVE-2020-8449 Improper Input Validation issues in HTTP Request processing.\n + CVE-2020-8450 Improper Input Validation issues in HTTP Request processing.\n + CVE-2019-12528 Information Disclosure issue in FTP Gateway.\n + CVE-2020-8517 Buffer Overflow issue in ext_lm_group_acl helper.\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": "2020-03-16T00:00:00", "type": "altlinux", "title": "Security fix for the ALT Linux 9 package squid version 4.10-alt1", "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-2019-12523", "CVE-2019-12526", "CVE-2019-12528", "CVE-2019-18676", "CVE-2019-18677", "CVE-2019-18678", "CVE-2019-18679", "CVE-2020-8449", "CVE-2020-8450", "CVE-2020-8517"], "modified": "2020-03-16T00:00:00", "id": "F7336A12B4B581B50ACA516BE4EA6F7E", "href": "https://packages.altlinux.org/en/p9/srpms/squid/2509265913505132702", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}]}
CVE-2020-8517
