{"schemaVersion":3,"id":"USN-5474-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"varnish vulnerabilities\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)","dates":{"published":"2022-06-08T19:20:14.000Z","modified":"2026-04-27T16:19:03.423Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"varnish","name":"varnish","label":"varnish","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/varnish","purlType":"deb","versions":[{"text":"< 5.2.1-1ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 6.2.1-2ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 6.6.1-1ubuntu0.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 5.2.1-1ubuntu0.1 | < 6.2.1-2ubuntu0.1 | < 6.6.1-1ubuntu0.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5474-1","label":"ubuntu.com/security/notices/USN-5474-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-20637","label":"ubuntu.com/security/CVE-2019-20637","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-11653","label":"ubuntu.com/security/CVE-2020-11653","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-36740","label":"ubuntu.com/security/CVE-2021-36740","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2022-23959","label":"ubuntu.com/security/CVE-2022-23959","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-20637","CVE-2020-11653","CVE-2021-36740","CVE-2022-23959"],"downstream":[],"duplicates":[],"related":["CVE-2019-20637","CVE-2020-11653","CVE-2021-36740","CVE-2022-23959"]},"timeline":[{"kind":"published","date":"2022-06-08T19:20:14.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T16:19:03.423Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:38:39.500Z","stale":false,"partial":false}}