{"id":"USN-7047-1","summary":"knot-resolver vulnerabilities","details":"Vladimír 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)\n","modified":"2026-04-27T17:17:23.399773969Z","published":"2024-10-01T06:53:06Z","related":["UBUNTU-CVE-2019-10190","UBUNTU-CVE-2019-10191","UBUNTU-CVE-2019-19331","UBUNTU-CVE-2020-12667","UBUNTU-CVE-2025-12748","UBUNTU-CVE-2025-13193"],"upstream":["CVE-2019-10190","CVE-2019-10191","CVE-2019-19331","CVE-2020-12667","UBUNTU-CVE-2019-10190","UBUNTU-CVE-2019-10191","UBUNTU-CVE-2019-19331","UBUNTU-CVE-2020-12667"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7047-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-10190"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-10191"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-19331"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-12667"}],"affected":[{"package":{"name":"knot-resolver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/knot-resolver@3.2.1-3ubuntu2.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu2.2"}]}],"versions":["3.2.1-3","3.2.1-3ubuntu1","3.2.1-3ubuntu2","3.2.1-3ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"knot-resolver","binary_version":"3.2.1-3ubuntu2.2"},{"binary_name":"knot-resolver-module-http","binary_version":"3.2.1-3ubuntu2.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7047-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-10190"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-10191"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-19331"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2020-12667"}]}}}],"schema_version":"1.7.5"}