{"schema_version":"1.8.0","id":"CVE-2020-25829","published":"2020-10-16T06:15:12.357Z","modified":"2026-08-07T15:12:11.046631Z","related":["openSUSE-SU-2020:1687-1","openSUSE-SU-2024:11157-1"],"details":"An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/powerdns/pdns","events":[{"introduced":"0"},{"fixed":"77409aab0be43071b365760213894d6388c3df30"},{"introduced":"2e63a37703ddea61f037c312341d364224130e16"},{"fixed":"70b6d0d36de2489f68772da4ea59df5343a1dfd1"},{"introduced":"f8e019026f5a1eff4b56a90a39c4acac95ae9dc4"},{"fixed":"d37778a458510dd137916d752f6341c8063d09ea"}],"database_specific":{"cpe":"cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.1.18"},{"introduced":"4.2.0"},{"fixed":"4.2.5"},{"introduced":"4.3.0"},{"fixed":"4.3.5"}],"source":"CPE_RANGE"}}],"versions":["rec-4.1.17","rec-4.3.4","rec-4.2.4","rec-4.3.3","rec-4.2.3","rec-4.3.2","rec-4.1.16","rec-4.2.2","rec-4.3.1","rec-4.3.0","rec-4.1.15","rec-4.2.1","rec-4.1.14","rec-4.2.0","rec-4.1.13","rec-4.1.12","rec-4.1.11","rec-4.1.10","rec-4.1.9","rec-4.1.8","rec-4.1.7","rec-4.1.6","rec-4.1.5","rec-4.1.4","rec-4.1.3","rec-4.1.2","rec-4.1.1","dnsdist-1.2.0","auth-4.1.0","rec-4.1.0","rec-4.1.0-rc3","auth-4.1.0-rc3","auth-4.1.0-rc2","rec-4.1.0-rc2","rec-4.1.0-rc1","auth-4.1.0-rc1","rec-4.1.0-alpha1","dnsdist-1.1.0","dnsdist-1.1.0-beta2","dnsdist-1.1.0-beta1","rec-4.0.2","rec-4.0.1","auth-4.0.1","rec-4.0.0","auth-4.0.0","auth-4.0.0-rc1","auth-4.0.0-rc2","rec-4.0.0-rc1","rec-4.0.0-beta1","auth-4.0.0-beta1","auth-4.0.0-alpha3","rec-4.0.0-alpha3","dnsdist-1.0.0","dnsdist-1.0.0-beta1","rec-4.0.0-alpha2","auth-4.0.0-alpha2","dnsdist-1.0.0-alpha2","auth-4.0.0-alpha1","rec-4.0.0-alpha1","dnsdist-1.0.0-alpha1","auth-3.4.0","auth-3.4.0-rc2","rec-3.6.0","auth-3.4.0-rc1","rec-3.5","rec-3.5-rc5","rec-3.5-rc4","rec-3.5-rc3","rec-3.5-rc1","auth-3.2-rc4","auth-3.2-rc3","auth-3.2-rc2","auth-3.2-rc1","auth-3.1-rc3","auth-3.1-rc2","auth-3.1-rc1","rec-3.3.1","rec-3.1.4","rec-3.0.1","rec-3-0-1","rec-3.0","rec-3-0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25829.json","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"77679631441445527983920042920211549080","length":729},"id":"CVE-2020-25829-ac387b1a","signature_type":"Function","signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/77409aab0be43071b365760213894d6388c3df30","target":{"file":"pdns/recursor_cache.cc","function":"MemRecursorCache::updateValidationStatus"}},{"deprecated":false,"digest":{"line_hashes":["47417538831777855470350430050715081350","148055263521903558314326114750883219758","35080228024880871007699290772856527215","67316773013314591480806366431856137347","117026657073042240224421905896698093643","323213353731232169172399806756170124246","155500896485175737294500301755246166961","224196667708172987418133306458664934984","144653575526639387313445865962482611461","103108929300239247840240085865274340062","32309045751000532166148983162358670769","252546257047801208426498952786257063949"],"threshold":0.9},"id":"CVE-2020-25829-e5cd83e1","signature_type":"Line","signature_version":"v1","source":"https://github.com/powerdns/pdns/commit/77409aab0be43071b365760213894d6388c3df30","target":{"file":"pdns/recursor_cache.cc"}}],"vanir_signatures_modified":"2026-08-07T15:12:11Z"}}],"references":[{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html"},{"type":"ADVISORY","url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202012-19"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*","cpe:2.3:a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:*"],"extracted_events":[{"introduced":"15.0-sp1"},{"last_affected":"15.0-sp1"},{"introduced":"15.0-sp2"},{"last_affected":"15.0-sp2"}],"source":"CPE_STRING","vendor_product":"opensuse:backports_sle"},{"cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"15.1"},{"last_affected":"15.1"},{"introduced":"15.2"},{"last_affected":"15.2"}],"source":"CPE_STRING","vendor_product":"opensuse:leap"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}