{"schemaVersion":3,"id":"USN-4213-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"squid, squid3 vulnerabilities\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 and access restricted servers. This issue was\nonly addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-12523)\n\nJeriko One discovered that Squid incorrectly handed URN responses. A remote\nattacker could use this issue to cause Squid to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. (CVE-2019-12526)\n\nAlex Rousskov discovered that Squid incorrectly handled certain strings. A\nremote attacker could possibly use this issue to cause Squid to crash,\nresulting in a denial of service. This issue only affected Ubuntu 19.04.\n(CVE-2019-12854)\n\nJeriko One and Kristoffer Danielsson discovered that Squid incorrectly\nhandled certain input. A remote attacker could use this issue to cause\nSquid to crash, resulting in a denial of service, or possibly execute\narbitrary code. This issue was only addressed in Ubuntu 19.04 and Ubuntu\n19.10. (CVE-2019-18676)\n\nKristoffer Danielsson discovered that Squid incorrectly handled certain\nmessages. This issue could result in traffic being redirected to origins\nit should not be delivered to. (CVE-2019-18677)\n\nRégis Leroy discovered that Squid incorrectly handled certain HTTP\nrequest headers. A remote attacker could use this to smuggle HTTP requests\nand corrupt caches with arbitrary content. (CVE-2019-18678)\n\nDavid Fifield discovered that Squid incorrectly handled HTTP Digest\nAuthentication. A remote attacker could possibly use this issue to obtain\npointer contents and bypass ASLR protections. (CVE-2019-18679)","dates":{"published":"2019-12-04T17:28:48.000Z","modified":"2026-02-10T04:41:43.000Z","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":"< 3.5.12-1ubuntu7.9","noFixRecorded":false,"fixedIn":null},{"text":"< 3.5.27-1ubuntu1.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.5.12-1ubuntu7.9 | < 3.5.27-1ubuntu1.4","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4213-1","label":"ubuntu.com/security/notices/USN-4213-1","hostname":"ubuntu.com","tags":["Advisory"]},{"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-2019-12526","label":"ubuntu.com/security/CVE-2019-12526","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-12854","label":"ubuntu.com/security/CVE-2019-12854","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"]},{"url":"https://ubuntu.com/security/CVE-2019-18677","label":"ubuntu.com/security/CVE-2019-18677","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-18678","label":"ubuntu.com/security/CVE-2019-18678","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-18679","label":"ubuntu.com/security/CVE-2019-18679","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-12523","CVE-2019-12526","CVE-2019-18676","CVE-2019-18677","CVE-2019-18678","CVE-2019-18679"],"downstream":[],"duplicates":[],"related":["CVE-2019-12523","CVE-2019-12526","CVE-2019-18676","CVE-2019-18677","CVE-2019-18678","CVE-2019-18679"]},"timeline":[{"kind":"published","date":"2019-12-04T17:28:48.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-10T04:41:43.000Z","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":"2026-10-20T00:21:03.931Z","stale":false,"partial":false}}