{"id":"CVE-2016-3120","aliases":["ALPINE-CVE-2016-3120","BELL-CVE-2016-3120","DEBIAN-CVE-2016-3120","DLA-1265-1","EUVD-2016-4173","GHSA-8q8p-vxj6-fg2g","MGASA-2016-0306","RHSA-2016:2591","SUSE-SU-2016:2136-1","UBUNTU-CVE-2016-3120","openSUSE-SU-2024:10004-1"],"status":"published","title":"The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT...","description":"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.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0462,"percentile":0.9176,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2016-08-01T01:00:00Z","modified":"2026-10-24T14:12:06Z","fixes":[{"ecosystem":"Alpine:v3.2","package":"krb5","fixed_in":["1.13.6-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.3","package":"krb5","fixed_in":["1.14.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.4","package":"krb5","fixed_in":["1.14.3-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"krb5","fixed_in":["1.14.3+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"krb5","fixed_in":["1.14.3+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"krb5","fixed_in":["1.14.3+dfsg-1"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"krb5","fixed_in":["1.12.5-1.1.mga5"],"sources":["osv"]},{"ecosystem":"SUSE:Linux 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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.","status":"published","published":"2016-08-01T01:00:00Z","modified":"2024-08-05T23:47:57.164Z","updated_at":"2026-11-02T14:33:34.094161Z"}],"euvd":[{"id":"EUVD-2016-4173","description":"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.","status":"published","published":"2016-08-01T01:00:00Z","modified":"2024-08-05T23:47:57Z","updated_at":"2026-11-03T02:22:51.132305Z"}],"ghsa":[{"id":"GHSA-8q8p-vxj6-fg2g","title":"The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT...","description":"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.","status":"published","published":"2022-05-13T01:28:48Z","modified":"2025-04-12T13:04:02Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:01:29.190007Z"}],"nvd":[{"id":"CVE-2016-3120","description":"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.","status":"published","published":"2016-08-01T02:59:12.37Z","modified":"2026-06-17T00:45:00.557Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:03:28.854267Z"}],"osv":[{"id":"ALPINE-CVE-2016-3120","description":"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.","status":"published","published":"2016-08-01T02:59:12.37Z","modified":"2026-09-22T06:30:21.27863179Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:27:46.318571Z"},{"id":"BELL-CVE-2016-3120","title":"CVE-2016-3120 does not affect BellSoft software","status":"withdrawn","published":"2016-08-01T02:59:00Z","modified":"2026-01-26T09:50:04.194849Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:13.47097Z"},{"id":"CVE-2016-3120","description":"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.","status":"published","published":"2016-08-01T02:59:12.37Z","modified":"2026-10-24T14:12:06.141784379Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:02.114472Z"},{"id":"DEBIAN-CVE-2016-3120","description":"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.","status":"published","published":"2016-08-01T02:59:12.37Z","modified":"2026-09-22T07:00:08.978077675Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:27.627285Z"},{"id":"RHSA-2016:2591","title":"Red Hat Security Advisory: krb5 security, bug fix, and enhancement update","status":"published","published":"2024-09-15T23:23:09Z","modified":"2026-08-05T10:04:08Z","cvss":[{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:03.734507Z"},{"id":"UBUNTU-CVE-2016-3120","description":"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.","status":"published","published":"2016-08-01T02:59:00Z","modified":"2026-04-22T10:39:47.543821Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:11.872222Z"},{"id":"DLA-1265-1","title":"krb5 - security update","status":"published","published":"2018-01-31T00:00:00Z","modified":"2026-03-09T01:01:20.039047Z","updated_at":"2026-11-02T15:46:09.336894Z"},{"id":"MGASA-2016-0306","title":"Updated krb5 packages fix security vulnerability","description":"The validate_as_request function in kdc_util.c in the Key Distribution\nCenter (KDC) in MIT Kerberos 5 (aka krb5) before 1.14.3, when\nrestrict_anonymous_to_tgt is enabled, uses an incorrect client data\nstructure, which allows remote\nauthenticated users to cause a denial of service (NULL pointer dereference\nand daemon crash) via an S4U2Self request (CVE-2016-3120).\n","status":"published","published":"2016-09-16T09:27:13Z","modified":"2026-04-16T06:25:20.242118879Z","updated_at":"2026-11-02T15:49:40.103088Z"},{"id":"openSUSE-SU-2024:10004-1","title":"krb5-1.15-1.1 on GA media","description":"These are all security issues fixed in the krb5-1.15-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:18:07.629761Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"SUSE-SU-2016:2136-1","title":"Security update for krb5","description":"\nThis update for krb5 fixes the following issues:\n\n- CVE-2016-3120: KDC NULL Pointer Dereference Denial Of Service Vulnerability (bsc#991088)\n","status":"published","published":"2016-08-23T13:21:32Z","modified":"2026-02-04T02:43:15.327858Z","updated_at":"2026-11-02T15:53:43.438985Z"}]}}