{"id":"USN-6225-1","summary":"knot-resolver vulnerability","details":"It was discovered that Knot Resolver did not correctly handle certain\nclient options. A remote attacker could send requests to malicous domains\nand cause a denial of service.    \n","modified":"2026-06-25T13:32:00.503288063Z","published":"2023-07-13T02:20:36Z","related":["UBUNTU-CVE-2022-40188"],"upstream":["CVE-2022-40188","UBUNTU-CVE-2022-40188"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6225-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-40188"}],"affected":[{"package":{"name":"knot-resolver","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0~beta3-1ubuntu0.1~esm1"}]}],"versions":["1.0.0~beta2-123-g6134920-1","1.0.0~beta3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"knot-resolver","binary_version":"1.0.0~beta3-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2022-40188","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"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"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6225-1.json"}},{"package":{"name":"knot-resolver","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.1-1ubuntu0.1~esm2"}]}],"versions":["1.3.3-1","1.5.0-4","1.5.1-1","1.5.2-1","2.0.0-3","2.1.0-1","2.1.0-2","2.1.1-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"2.1.1-1ubuntu0.1~esm2","binary_name":"knot-resolver"},{"binary_name":"knot-resolver-module-http","binary_version":"2.1.1-1ubuntu0.1~esm2"},{"binary_version":"2.1.1-1ubuntu0.1~esm2","binary_name":"libkres6"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2022-40188","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"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6225-1.json"}},{"package":{"name":"knot-resolver","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/knot-resolver?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.1-3ubuntu2.1"}]}],"versions":["3.2.1-3","3.2.1-3ubuntu1","3.2.1-3ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"knot-resolver","binary_version":"3.2.1-3ubuntu2.1"},{"binary_name":"knot-resolver-module-http","binary_version":"3.2.1-3ubuntu2.1"}]},"database_specific":{"cves_map":{"cves":[{"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-2022-40188"}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6225-1.json"}},{"package":{"name":"knot-resolver","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/knot-resolver?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.4-1ubuntu0.1~esm1"}]}],"versions":["5.3.1-1","5.4.2-1","5.4.3-1","5.4.4-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"5.4.4-1ubuntu0.1~esm1","binary_name":"knot-resolver"},{"binary_name":"knot-resolver-module-http","binary_version":"5.4.4-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6225-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:22.04:LTS","cves":[{"id":"CVE-2022-40188","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"}]}]}}}],"schema_version":"1.7.5"}