{"schemaVersion":3,"id":"USN-4446-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"squid3 vulnerabilities\n\nJeriko One discovered that Squid incorrectly handled caching certain\nrequests. A remote attacker could possibly use this issue to perform\ncache-injection attacks or gain access to reverse proxy features such as\nESI. (CVE-2019-12520)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly\nhandled certain URN requests. A remote attacker could possibly use this\nissue to bypass access checks. (CVE-2019-12523)\n\nJeriko One discovered that Squid incorrectly handled URL decoding. A remote\nattacker could possibly use this issue to bypass certain rule checks.\n(CVE-2019-12524)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly\nhandled input validation. A remote attacker could use this issue to cause\nSquid to crash, resulting in a denial of service. (CVE-2019-18676)","dates":{"published":"2020-08-03T13:25:55.000Z","modified":"2026-02-10T04:41:54.000Z","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":"< 3.5.12-1ubuntu7.12","noFixRecorded":false,"fixedIn":null},{"text":"< 3.5.27-1ubuntu1.7","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.5.12-1ubuntu7.12 | < 3.5.27-1ubuntu1.7","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4446-1","label":"ubuntu.com/security/notices/USN-4446-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-12520","label":"ubuntu.com/security/CVE-2019-12520","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-12523","label":"ubuntu.com/security/CVE-2019-12523","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-12524","label":"ubuntu.com/security/CVE-2019-12524","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-18676","label":"ubuntu.com/security/CVE-2019-18676","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-12520","CVE-2019-12523","CVE-2019-12524","CVE-2019-18676"],"downstream":[],"duplicates":[],"related":["CVE-2019-12520","CVE-2019-12523","CVE-2019-12524","CVE-2019-18676"]},"timeline":[{"kind":"published","date":"2020-08-03T13:25:55.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:41:54.000Z","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":"2026-10-21T05:25:48.583Z","stale":false,"partial":false}}