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There can be an assertion failure and daemon restart, which causes a performance loss.\n#### Mitigation\n\nAn user can mitigate the problem by setting the proxy protocol to version 1 on the TLS Proxy side, as this flaw only affects the proxy protocol version 2. \n\n", "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": "2020-04-09T11:03:19", "type": "redhatcve", "title": "CVE-2020-11653", "bulletinFamily": "info", "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-2020-11653"], "modified": "2023-04-06T07:41:39", "id": "RH:CVE-2020-11653", "href": "https://access.redhat.com/security/cve/cve-2020-11653", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "prion": [{"lastseen": "2023-08-16T10:15:00", "description": "An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.", "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": "2020-04-08T23:15:00", "type": "prion", "title": "CVE-2020-11653", "bulletinFamily": "NVD", "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-2020-11653"], "modified": "2022-11-29T19:19:00", "id": "PRION:CVE-2020-11653", "href": "https://kb.prio-n.com/vulnerability/CVE-2020-11653", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "debiancve": [{"lastseen": "2023-06-06T15:03:38", "description": "An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.", "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": "2020-04-08T23:15:00", "type": "debiancve", "title": "CVE-2020-11653", "bulletinFamily": "info", "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-2020-11653"], "modified": "2020-04-08T23:15:00", "id": "DEBIANCVE:CVE-2020-11653", "href": "https://security-tracker.debian.org/tracker/CVE-2020-11653", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "ubuntu": [{"lastseen": "2023-06-06T15:25:52", "description": "## Releases\n\n * Ubuntu 20.04 LTS\n\n## Packages\n\n * varnish \\- state of the art, high-performance web accelerator\n\nUSN-5474-1 fixed vulnerabilities in Varnish Cache. Unfortunately the fix for \nCVE-2020-11653 was incomplete. This update fixes the problem.\n\nOriginal advisory details:\n\nIt was discovered that Varnish Cache could have an assertion failure when a \nTLS termination proxy uses PROXY version 2. A remote attacker could possibly \nuse this issue to restart the daemon and cause a performance loss. \n(CVE-2020-11653)\n", "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": "2022-08-23T00:00:00", "type": "ubuntu", "title": "Varnish Cache regression", "bulletinFamily": "unix", "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-2020-11653"], "modified": "2022-08-23T00:00:00", "id": "USN-5474-2", "href": "https://ubuntu.com/security/notices/USN-5474-2", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-07-23T09:09:25", "description": "## Releases\n\n * Ubuntu 22.04 LTS\n * Ubuntu 21.10 \n * Ubuntu 20.04 LTS\n * Ubuntu 18.04 ESM\n\n## Packages\n\n * varnish \\- state of the art, high-performance web accelerator\n\nIt was dicovered that Varnish Cache did not clear a pointer between the \nhandling of one client request and the next request within the same connection. \nA remote attacker could possibly use this issue to obtain sensitive \ninformation. (CVE-2019-20637)\n\nIt was discovered that Varnish Cache could have an assertion failure when a \nTLS termination proxy uses PROXY version 2. A remote attacker could possibly \nuse this issue to restart the daemon and cause a performance loss. \n(CVE-2020-11653)\n\nIt was discovered that Varnish Cache allowed request smuggling and VCL \nauthorization bypass via a large Content-Length header for a POST \nrequest. A remote attacker could possibly use this issue to obtain sensitive \ninformation. (CVE-2021-36740)\n\nIt was discovered that Varnish Cache allowed request smuggling for HTTP/1 \nconnections. A remote attacker could possibly use this issue to obtain \nsensitive information. (CVE-2022-23959)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "baseScore": 9.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.2}, "published": "2022-06-08T00:00:00", "type": "ubuntu", "title": "Varnish Cache vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "PARTIAL", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 6.4, "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 4.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-20637", "CVE-2020-11653", "CVE-2021-36740", "CVE-2022-23959"], "modified": "2022-06-08T00:00:00", "id": "USN-5474-1", "href": "https://ubuntu.com/security/notices/USN-5474-1", "cvss": {"score": 6.4, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:N"}}], "ubuntucve": [{"lastseen": "2023-06-28T13:49:33", "description": "An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x\nbefore 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a\nTLS termination proxy uses PROXY version 2. There can be an assertion\nfailure and daemon restart, which causes a performance loss.\n\n#### Bugs\n\n * <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=956307>\n", "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": "2020-04-08T00:00:00", "type": "ubuntucve", "title": "CVE-2020-11653", "bulletinFamily": "info", "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-2020-11653"], "modified": "2020-04-08T00:00:00", "id": "UB:CVE-2020-11653", "href": "https://ubuntu.com/security/CVE-2020-11653", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "openvas": [{"lastseen": "2020-06-25T13:27:26", "description": "The remote host is missing an update for the ", "cvss3": {}, "published": "2020-06-17T00:00:00", "type": "openvas", "title": "openSUSE: Security Advisory for varnish (openSUSE-SU-2020:0808-1)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2020-11653", "CVE-2019-20637"], "modified": "2020-06-24T00:00:00", "id": "OPENVAS:1361412562310853210", "href": "http://plugins.openvas.org/nasl.php?oid=1361412562310853210", "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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CVE-2019-20637: Fixed an information leak when handling one client\n request and the next on the same connection (boo#1169040)\n\n - CVE-2020-11653: Fixed a performance loss due to an assertion failure and\n daemon restart when communicating with TLS termination proxy that uses\n PROXY version 2 (boo#1169039)\n\n\n Patch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended\n 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-2020-808=1\");\n\n script_tag(name:\"affected\", value:\"'varnish' package(s) on openSUSE Leap 15.1.\");\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 == \"openSUSELeap15.1\") {\n\n if(!isnull(res = isrpmvuln(pkg:\"libvarnishapi2\", rpm:\"libvarnishapi2~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\n report += res;\n }\n\n if(!isnull(res = isrpmvuln(pkg:\"libvarnishapi2-debuginfo\", rpm:\"libvarnishapi2-debuginfo~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\n report += res;\n }\n\n if(!isnull(res = isrpmvuln(pkg:\"varnish\", rpm:\"varnish~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\n report += res;\n }\n\n if(!isnull(res = isrpmvuln(pkg:\"varnish-debuginfo\", rpm:\"varnish-debuginfo~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\n report += res;\n }\n\n if(!isnull(res = isrpmvuln(pkg:\"varnish-debugsource\", rpm:\"varnish-debugsource~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\n report += res;\n }\n\n if(!isnull(res = isrpmvuln(pkg:\"varnish-devel\", rpm:\"varnish-devel~6.2.1~lp151.3.6.1\", rls:\"openSUSELeap15.1\"))) {\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": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "suse": [{"lastseen": "2022-04-18T12:41:17", "description": "An update that fixes two vulnerabilities is now available.\n\nDescription:\n\n This update for varnish fixes the following issues:\n\n - CVE-2019-20637: Fixed an information leak when handling one client\n request and the next on the same connection (boo#1169040)\n - CVE-2020-11653: Fixed a performance loss due to an assertion failure and\n daemon restart when communicating with TLS termination proxy that uses\n PROXY version 2 (boo#1169039)\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-2020-808=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": "2020-06-16T00:00:00", "type": "suse", "title": "Security update for varnish (moderate)", "bulletinFamily": "unix", "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-2019-20637", "CVE-2020-11653"], "modified": "2020-06-16T00:00:00", "id": "OPENSUSE-SU-2020:0808-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/PCUUXZW2DUUNCOBXQJNOGTFZJED26EJM/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}, {"lastseen": "2022-04-18T12:41:17", "description": "An update that fixes two vulnerabilities is now available.\n\nDescription:\n\n This update for varnish fixes the following issues:\n\n - CVE-2019-20637: Fixed an information leak when handling one client\n request and the next on the same connection (boo#1169040)\n - CVE-2020-11653: Fixed a performance loss due to an assertion failure and\n daemon restart when communicating with TLS termination proxy that uses\n PROXY version 2 (boo#1169039)\n\n This update was imported from the openSUSE:Leap:15.1: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 Backports SLE-15-SP1:\n\n zypper in -t patch openSUSE-2020-819=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": "2020-06-16T00:00:00", "type": "suse", "title": "Security update for varnish (moderate)", "bulletinFamily": "unix", "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-2019-20637", "CVE-2020-11653"], "modified": "2020-06-16T00:00:00", "id": "OPENSUSE-SU-2020:0819-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/SC6JBGFRDO2KYXWHDNCH6CJL6N7QISZW/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:P/I:N/A:N"}}], "debian": [{"lastseen": "2023-06-07T15:15:21", "description": "-------------------------------------------------------------------------\nDebian LTS Advisory DLA-3208-1 debian-lts@lists.debian.org\nhttps://www.debian.org/lts/security/ Markus Koschany\nNovember 27, 2022 https://wiki.debian.org/LTS\n-------------------------------------------------------------------------\n\nPackage : varnish\nVersion : 6.1.1-1+deb10u4\nCVE ID : CVE-2020-11653 CVE-2022-45060\nDebian Bug : 956307 1023751\n\nMartin van Kervel Smedshammer discovered a request forgery attack can be\nperformed on Varnish Cache servers that have the HTTP/2 protocol turned on. An\nattacker may introduce characters through the HTTP/2 pseudo-headers that are\ninvalid in the context of an HTTP/1 request line, causing the Varnish server to\nproduce invalid HTTP/1 requests to the backend. This may in turn be used to\nsuccessfully exploit vulnerabilities in a server behind the Varnish server.\n\nFor Debian 10 buster, these problems have been fixed in version\n6.1.1-1+deb10u4.\n\nWe recommend that you upgrade your varnish packages.\n\nFor the detailed security status of varnish please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/varnish\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\nAttachment:\nsignature.asc\nDescription: This is a digitally signed message part\n", "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": "2022-11-27T22:35:03", "type": "debian", "title": "[SECURITY] [DLA 3208-1] varnish security update", "bulletinFamily": "unix", "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-2020-11653", "CVE-2022-45060"], "modified": "2022-11-27T22:35:03", "id": "DEBIAN:DLA-3208-1:B388D", "href": "https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "osv": [{"lastseen": "2022-11-28T00:20:43", "description": "\nMartin van Kervel Smedshammer discovered a request forgery attack can be\nperformed on Varnish Cache servers that have the HTTP/2 protocol turned on. An\nattacker may introduce characters through the HTTP/2 pseudo-headers that are\ninvalid in the context of an HTTP/1 request line, causing the Varnish server to\nproduce invalid HTTP/1 requests to the backend. This may in turn be used to\nsuccessfully exploit vulnerabilities in a server behind the Varnish server.\n\n\nFor Debian 10 buster, these problems have been fixed in version\n6.1.1-1+deb10u4.\n\n\nWe recommend that you upgrade your varnish packages.\n\n\nFor the detailed security status of varnish please refer to\nits security tracker page at:\n<https://security-tracker.debian.org/tracker/varnish>\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": "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": "2022-11-27T00:00:00", "type": "osv", "title": "varnish - security update", "bulletinFamily": "software", "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-2020-11653", "CVE-2022-45060"], "modified": "2022-11-28T00:20:42", "id": "OSV:DLA-3208-1", "href": "https://osv.dev/vulnerability/DLA-3208-1", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "rocky": [{"lastseen": "2023-07-24T17:30:01", "description": "An update is available for varnish, varnish-modules.\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\nVarnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.\n\nThe following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)\n\nSecurity Fix(es):\n\n* varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)\n\n* varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)\n\n* varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)\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": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-11-03T12:33:31", "type": "rocky", "title": "varnish:6 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "COMPLETE", "integrityImpact": "NONE", "baseScore": 7.8, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-15892", "CVE-2019-20637", "CVE-2020-11653"], "modified": "2020-11-03T12:33:31", "id": "RLSA-2020:4756", "href": "https://errata.rockylinux.org/RLSA-2020:4756", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}], "oraclelinux": [{"lastseen": "2021-07-28T14:25:08", "description": "varnish\n[6.0.6-2]\n- new version 6.0.6\n- Resolves: #1795673 - RFE: rebase varnish:6 to latest 6.0.x LTS\n- Resolves: #1790907 - CVE-2019-20637 varnish: not clearing pointer between two\n client requests leads to information disclosure\n- Resolves: #1763958 - CVE-2019-15892 varnish:6/varnish: denial of service\n handling certain crafted HTTP/1 requests\nvarnish-modules\n[0.15.0-5]\n- Related: #1795673 - RFE: rebase varnish:6 to latest 6.0.x LTS", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 3.6}, "published": "2020-11-10T00:00:00", "type": "oraclelinux", "title": "varnish:6 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "COMPLETE", "integrityImpact": "NONE", "baseScore": 7.8, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-15892", "CVE-2019-20637", "CVE-2020-11653"], "modified": "2020-11-10T00:00:00", "id": "ELSA-2020-4756", "href": "http://linux.oracle.com/errata/ELSA-2020-4756.html", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}], "almalinux": [{"lastseen": "2021-08-11T15:48:29", "description": "Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.\n\nThe following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)\n\nSecurity Fix(es):\n\n* varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)\n\n* varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)\n\n* varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)\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": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "userInteraction": "NONE", "version": "3.0"}, "impactScore": 3.6}, "published": "2020-11-03T12:33:31", "type": "almalinux", "title": "Moderate: varnish:6 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "COMPLETE", "integrityImpact": "NONE", "baseScore": 7.8, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-15892", "CVE-2019-20637", "CVE-2020-11653"], "modified": "2021-08-11T13:42:14", "id": "ALSA-2020:4756", "href": "https://errata.almalinux.org/8/ALSA-2020-4756.html", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}], "redhat": [{"lastseen": "2023-08-04T12:27:58", "description": "Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.\n\nThe following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673)\n\nSecurity Fix(es):\n\n* varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892)\n\n* varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653)\n\n* varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637)\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": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-11-03T12:33:31", "type": "redhat", "title": "(RHSA-2020:4756) Moderate: varnish:6 security, bug fix, and enhancement update", "bulletinFamily": "unix", "cvss2": {"severity": "HIGH", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "COMPLETE", "integrityImpact": "NONE", "baseScore": 7.8, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 6.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2019-15892", "CVE-2019-20637", "CVE-2020-11653"], "modified": "2020-11-04T00:04:23", "id": "RHSA-2020:4756", "href": "https://access.redhat.com/errata/RHSA-2020:4756", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}]}
CVE-2020-11653
