{"schemaVersion":3,"id":"USN-7047-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"knot-resolver vulnerabilities\n\nVladimír Čunát discovered that Knot Resolver incorrectly handled input\nduring DNSSEC validation. A remote attacker could possibly use this issue\nto bypass certain validations. (CVE-2019-10190)\n\nVladimír Čunát discovered that Knot Resolver incorrectly handled input\nduring DNSSEC validation. A remote attacker could possibly use this issue\nto downgrade DNSSEC-secure domains to a DNSSEC-insecure state, resulting\nin a domain hijacking attack. (CVE-2019-10191)\n\nVladimír Čunát discovered that Knot Resolver incorrectly handled certain\nDNS replies with many resource records. An attacker could possibly use\nthis issue to consume system resources, resulting in a denial of service.\n(CVE-2019-19331)\n\nLior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Knot\nResolver incorrectly handled certain queries. A remote attacker could\nuse this issue to perform an amplification attack directed at a target.\n(CVE-2020-12667)","dates":{"published":"2024-10-01T06:53:06.000Z","modified":"2026-04-27T17:47:13.764Z","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":"knot-resolver","name":"knot-resolver","label":"knot-resolver","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/knot-resolver","purlType":"deb","versions":[{"text":"< 3.2.1-3ubuntu2.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.2.1-3ubuntu2.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7047-1","label":"ubuntu.com/security/notices/USN-7047-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-10190","label":"ubuntu.com/security/CVE-2019-10190","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-10191","label":"ubuntu.com/security/CVE-2019-10191","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-19331","label":"ubuntu.com/security/CVE-2019-19331","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-12667","label":"ubuntu.com/security/CVE-2020-12667","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-10190","CVE-2019-10191","CVE-2019-19331","CVE-2020-12667"],"downstream":[],"duplicates":[],"related":["CVE-2019-10190","CVE-2019-10191","CVE-2019-19331","CVE-2020-12667","CVE-2025-12748","CVE-2025-13193"]},"timeline":[{"kind":"published","date":"2024-10-01T06:53:06.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T17:47:13.764Z","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":"2026-10-20T01:35:29.056Z","stale":false,"partial":false}}