{"schemaVersion":3,"id":"USN-5771-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"squid3 regression\n\nUSN-3557-1 fixed vulnerabilities in Squid. This update introduced a regression\nwhich could cause the cache log to be filled with many Vary loop messages. This\nupdate fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\nMathias Fischer discovered that Squid incorrectly handled certain long\nstrings in headers. A malicious remote server could possibly cause Squid to\ncrash, resulting in a denial of service. This issue was only addressed in\nUbuntu 16.04 LTS. (CVE-2016-2569)\n\nWilliam Lima discovered that Squid incorrectly handled XML parsing when\nprocessing Edge Side Includes (ESI). A malicious remote server could\npossibly cause Squid to crash, resulting in a denial of service. This issue\nwas only addressed in Ubuntu 16.04 LTS. (CVE-2016-2570)\n\nAlex Rousskov discovered that Squid incorrectly handled response-parsing\nfailures. A malicious remote server could possibly cause Squid to crash,\nresulting in a denial of service. This issue only applied to Ubuntu 16.04\nLTS. (CVE-2016-2571)\n\nSantiago Ruano Rincón discovered that Squid incorrectly handled certain\nVary headers. A remote attacker could possibly use this issue to cause\nSquid to crash, resulting in a denial of service. This issue was only\naddressed in Ubuntu 16.04 LTS. (CVE-2016-3948)\n\nLouis Dion-Marcil discovered that Squid incorrectly handled certain Edge\nSide Includes (ESI) responses. A malicious remote server could possibly\ncause Squid to crash, resulting in a denial of service. (CVE-2018-1000024)\n\nLouis Dion-Marcil discovered that Squid incorrectly handled certain Edge\nSide Includes (ESI) responses. A malicious remote server could possibly\ncause Squid to crash, resulting in a denial of service. (CVE-2018-1000027)","dates":{"published":"2022-12-12T00:46:49.000Z","modified":"2026-06-25T13:31:38.678Z","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":"squid3","name":"squid3","label":"squid3","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/squid3","purlType":"deb","versions":[{"text":"< 3.5.12-1ubuntu7.16+esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.5.12-1ubuntu7.16+esm1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5771-1","label":"ubuntu.com/security/notices/USN-5771-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://launchpad.net/bugs/1999346","label":"launchpad.net/bugs/1999346","hostname":"launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2022-12-12T00:46:49.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:31:38.678Z","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":"2026-10-19T11:13:23.650Z","stale":false,"partial":false}}