{"schemaVersion":3,"id":"USN-4456-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"dovecot vulnerabilities\n\nUSN-4456-1 fixed several vulnerabilities in Dovecot. This update provides\nthe corresponding update for Ubuntu 14.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that Dovecot incorrectly handled deeply nested MIME\n parts. A remote attacker could possibly use this issue to cause Dovecot to\n consume resources, resulting in a denial of service. (CVE-2020-12100)\n\n It was discovered that Dovecot incorrectly handled memory when using NTLM.\n A remote attacker could possibly use this issue to cause Dovecot to crash,\n resulting in a denial of service. (CVE-2020-12673)\n\n It was discovered that the Dovecot RPA mechanism incorrectly handled\n zero-length messages. A remote attacker could possibly use this issue to\n cause Dovecot to crash, resulting in a denial of service. (CVE-2020-12674)","dates":{"published":"2020-08-17T12:32:32.000Z","modified":"2026-04-22T10:07:21.142Z","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":"dovecot","name":"dovecot","label":"dovecot","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/dovecot","purlType":"deb","versions":[{"text":"< 1:2.2.9-1ubuntu2.6+esm3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:2.2.9-1ubuntu2.6+esm3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4456-2","label":"ubuntu.com/security/notices/USN-4456-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-12100","label":"ubuntu.com/security/CVE-2020-12100","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-12673","label":"ubuntu.com/security/CVE-2020-12673","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-12674","label":"ubuntu.com/security/CVE-2020-12674","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2020-12100","CVE-2020-12673","CVE-2020-12674"],"downstream":[],"duplicates":[],"related":["CVE-2020-12100","CVE-2020-12673","CVE-2020-12674"]},"timeline":[{"kind":"published","date":"2020-08-17T12:32:32.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:07:21.142Z","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":"2026-10-20T20:40:58.416Z","stale":false,"partial":false}}