{"id":"CVE-2021-40083","details":"Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case (NSEC3 with too many iterations used for a positive wildcard proof).","modified":"2026-07-09T00:36:45.434601Z","published":"2021-08-25T01:15:11.087Z","references":[{"type":"FIX","url":"https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1169"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/cz-nic/knot-resolver","events":[{"introduced":"0"},{"fixed":"ae3c81600a6ce5909bd3abc9dbc4d31e89ef3179"}],"database_specific":{"cpe":"cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"5.3.2"}],"source":"CPE_RANGE"}}],"versions":["v5.3.1","v5.3.0","v5.2.1","v5.2.0","v5.1.3","v5.1.2","v5.1.1","v5.1.0","v5.0.1","v5.0.0","v4.3.0","v4.2.2","v4.2.0","v4.1.0","v4.0.0","v3.2.1","v3.2.0","v3.1.0","v3.0.0","v2.4.0","v2.3.0","v2.2.0","v2.1.1","v2.1.0","v2.0.0","v1.5.1","v1.5.0","v1.4.0","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.6","v1.2.1","v1.2.0","v1.2.0-rc3","v1.2.0-rc2","v1.2.0-rc1","v1.1.1","v1.1.0","v1.0.0","v1.0.0-beta3","v1.0.0-beta2","v1.0.0-beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40083.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}