{"id":"CVE-2016-3120","details":"The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.","modified":"2026-07-08T12:41:11.168978Z","published":"2016-08-01T02:59:12.370Z","related":["SUSE-SU-2016:2136-1","openSUSE-SU-2024:10004-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"1.13"},{"last_affected":"1.13"}],"source":"CPE_STRING","vendor_product":"mit:kerberos_5"}]},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html"},{"type":"WEB","url":"http://web.mit.edu/kerberos/krb5-1.13/"},{"type":"WEB","url":"http://web.mit.edu/kerberos/krb5-1.14/"},{"type":"WEB","url":"http://www.securityfocus.com/bid/92132"},{"type":"WEB","url":"http://www.securitytracker.com/id/1036442"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-2591.html"},{"type":"REPORT","url":"http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458"},{"type":"FIX","url":"https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/krb5/krb5","events":[{"introduced":"3165ae71ba685ff0f105383a2c2a27a76e8efac4"},{"last_affected":"68a03305111126a183dbd3779497ed9e00be6e0a"},{"fixed":"93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7"}],"database_specific":{"cpe":["cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*","cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"1.13"},{"last_affected":"1.13"},{"introduced":"1.13.1"},{"last_affected":"1.13.1"},{"introduced":"1.13.2"},{"last_affected":"1.13.2"},{"introduced":"1.13.3"},{"last_affected":"1.13.3"},{"introduced":"1.13.4"},{"last_affected":"1.13.4"},{"introduced":"1.13.5"},{"last_affected":"1.13.5"},{"introduced":"1.13.6"},{"last_affected":"1.13.6"},{"introduced":"1.14"},{"last_affected":"1.14"},{"introduced":"1.14.1"},{"last_affected":"1.14.1"},{"introduced":"1.14.2"},{"last_affected":"1.14.2"}],"source":["CPE_STRING","REFERENCES"]}}],"versions":["1.13","1.13.1","1.13.2","1.13.3","1.13.4","1.13.5","1.13.6","1.14","1.14.1","1.14.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-3120.json","vanir_signatures_modified":"2026-07-08T12:41:11Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7","target":{"file":"src/kdc/kdc_util.c","function":"validate_as_request"},"deprecated":false,"digest":{"length":2440,"function_hash":"114832735742266611359956904032110077760"},"id":"CVE-2016-3120-5b944c3f","signature_type":"Function"},{"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["188127353243240745192543305669040301596","230037708568997149536374049167456462409","300683140533483817075971560559028595358","160102550585688257047493868450817751983"]},"id":"CVE-2016-3120-9c22472c","signature_type":"Line","signature_version":"v1","source":"https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7","target":{"file":"src/kdc/kdc_util.c"}}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}