{"api_version":"1","generated_at":"2026-04-23T01:12:18+00:00","cve":"CVE-2020-11653","urls":{"html":"https://cve.report/CVE-2020-11653","api":"https://cve.report/api/cve/CVE-2020-11653.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-11653","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-11653"},"summary":{"title":"CVE-2020-11653","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.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2020-04-08 23:15:00","updated_at":"2022-11-29 19:19:00"},"problem_types":["CWE-617"],"metrics":[],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html","name":"[debian-lts-announce] 20221127 [SECURITY] [DLA 3208-1] varnish security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 3208-1] varnish security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://varnish-cache.org/security/VSV00005.html#vsv00005","name":"https://varnish-cache.org/security/VSV00005.html#vsv00005","refsource":"MISC","tags":["Vendor Advisory"],"title":"VSV00005 Varnish HTTP Proxy Protocol V2 Denial of Service — Varnish HTTP Cache","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.html","name":"openSUSE-SU-2020:0819","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:0819-1: moderate: Security update f","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.html","name":"openSUSE-SU-2020:0808","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:0808-1: moderate: Security update f","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11653","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11653","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opensuse","cpe5":"backports_sle","cpe6":"15.0","cpe7":"sp1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"varnish-cache","cpe5":"varnish_cache","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"varnish-cache","cpe5":"varnish_cache","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"varnish-cache","cpe5":"varnish_cache","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"varnish-cache","cpe5":"varnish_cache","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"11653","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"varnish-software","cpe5":"varnish_cache","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-11653","qid":"181251","title":"Debian Security Update for varnish (DLA 3208-1)"},{"cve":"CVE-2020-11653","qid":"198827","title":"Ubuntu Security Notification for Varnish Cache Vulnerabilities (USN-5474-1)"},{"cve":"CVE-2020-11653","qid":"940035","title":"AlmaLinux Security Update for varnish:6 (ALSA-2020:4756)"},{"cve":"CVE-2020-11653","qid":"960778","title":"Rocky Linux Security Update for varnish:6 (RLSA-2020:4756)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-11653","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://varnish-cache.org/security/VSV00005.html#vsv00005","refsource":"MISC","name":"https://varnish-cache.org/security/VSV00005.html#vsv00005"},{"refsource":"SUSE","name":"openSUSE-SU-2020:0819","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.html"},{"refsource":"SUSE","name":"openSUSE-SU-2020:0808","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.html"},{"refsource":"MLIST","name":"[debian-lts-announce] 20221127 [SECURITY] [DLA 3208-1] varnish security update","url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html"}]}},"nvd":{"publishedDate":"2020-04-08 23:15:00","lastModifiedDate":"2022-11-29 19:19:00","problem_types":["CWE-617"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*","versionStartIncluding":"6.3.0","versionEndExcluding":"6.3.2","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*","versionStartIncluding":"6.1.0","versionEndExcluding":"6.2.3","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.0.6","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"11653","Ordinal":"172345","Title":"CVE-2020-11653","CVE":"CVE-2020-11653","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"11653","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"11653","Ordinal":"2","NoteData":"2020-04-08","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"11653","Ordinal":"3","NoteData":"2020-06-16","Type":"Other","Title":"Modified"}]}}}