{"id":"CVE-2021-3671","details":"A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.","modified":"2026-04-09T08:07:06.842982Z","published":"2021-10-12T18:15:08.357Z","related":["MGASA-2021-0543","MGASA-2022-0468","openSUSE-SU-2023:0019-1","openSUSE-SU-2023:0020-1","openSUSE-SU-2024:12580-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20221215-0002/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230216-0008/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5287"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C"},{"type":"REPORT","url":"https://bugzilla.samba.org/show_bug.cgi?id=14770%2C"},{"type":"FIX","url":"https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/heimdal/heimdal","events":[{"introduced":"0"},{"fixed":"04171147948d0a3636bc6374181926f0fb2ec83a"}]},{"type":"GIT","repo":"https://github.com/samba-team/samba","events":[{"introduced":"0"},{"fixed":"aa756f3f9fc88bbd10c6a3a7c1827ca09a669714"},{"introduced":"9b49519cae3e967af9ea48dc5fcfb6c145e31db4"},{"fixed":"d1c9330fa69ba6942ab23843e21acc11767d54ee"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"4.13.12"},{"introduced":"4.14.0"},{"fixed":"4.14.8"}]}}],"versions":["git2svn-syncpoint-master","heimdal-1.3.0pre1","heimdal-1.3.0pre10","heimdal-1.3.0pre11","heimdal-1.3.0pre3","heimdal-1.3.0pre4","heimdal-1.3.0pre5","heimdal-1.3.0pre6","heimdal-1.3.0pre7","heimdal-1.3.0pre8","heimdal-1.3.0pre9","heimdal-1.3.0rc1","heimdal-1.5pre1","heimdal-1.5pre2","ldb-1.1.0","ldb-1.1.10","ldb-1.1.11","ldb-1.1.12","ldb-1.1.13","ldb-1.1.14","ldb-1.1.15","ldb-1.1.16","ldb-1.1.17","ldb-1.1.18","ldb-1.1.19","ldb-1.1.2","ldb-1.1.20","ldb-1.1.21","ldb-1.1.22","ldb-1.1.23","ldb-1.1.25","ldb-1.1.26","ldb-1.1.27","ldb-1.1.28","ldb-1.1.29","ldb-1.1.3","ldb-1.1.30","ldb-1.1.31","ldb-1.1.4","ldb-1.1.5","ldb-1.1.6","ldb-1.1.8","ldb-1.1.9","ldb-1.2.0","ldb-1.2.1","ldb-1.2.2","ldb-1.3.0","ldb-1.3.1","ldb-1.3.2","ldb-1.4.0","ldb-1.4.1","ldb-1.5.0","ldb-1.5.1","ldb-1.5.2","ldb-1.6.1","ldb-1.6.2","ldb-1.6.3","ldb-2.0.5","ldb-2.1.0","ldb-2.1.1","ldb-2.2.0","samba-4.0.0alpha10","samba-4.0.0alpha17","samba-4.0.0alpha18","samba-4.0.0alpha19","samba-4.0.0alpha20","samba-4.0.0alpha21","samba-4.0.0alpha6","samba-4.0.0alpha7","samba-4.0.0alpha8","samba-4.0.0alpha9","samba-4.0.0beta1","samba-4.0.0beta2","samba-4.0.0beta3","samba-4.0.0beta4","samba-4.0.0beta5","samba-4.0.0beta6","samba-4.0.0beta7","samba-4.0.0beta8","samba-4.0.0rc1","samba-4.10.0rc1","samba-4.11.0rc1","samba-4.12.0rc1","samba-4.13.0","samba-4.13.0rc1","samba-4.13.0rc2","samba-4.13.0rc3","samba-4.13.0rc4","samba-4.13.0rc5","samba-4.13.0rc6","samba-4.13.10","samba-4.13.11","samba-4.13.2","samba-4.13.3","samba-4.13.4","samba-4.13.5","samba-4.13.9","samba-4.14.0","samba-4.14.3","samba-4.14.5","samba-4.14.6","samba-4.14.7","samba-4.2.0rc1","samba-4.3.0rc1","samba-4.4.0rc1","samba-4.5.0rc1","samba-4.6.0rc1","samba-4.7.0rc1","samba-4.8.0rc1","samba-4.9.0rc1","switch-from-svn-to-git","talloc-1.3.1","talloc-2.0.0","talloc-2.0.7","talloc-2.0.8","talloc-2.1.0","talloc-2.1.1","talloc-2.1.10","talloc-2.1.11","talloc-2.1.12","talloc-2.1.13","talloc-2.1.14","talloc-2.1.15","talloc-2.1.16","talloc-2.1.2","talloc-2.1.3","talloc-2.1.4","talloc-2.1.5","talloc-2.1.6","talloc-2.1.7","talloc-2.1.8","talloc-2.1.9","talloc-2.2.0","talloc-2.3.0","talloc-2.3.1","tdb-1.1.5","tdb-1.2.0","tdb-1.2.1","tdb-1.2.10","tdb-1.2.11","tdb-1.2.12","tdb-1.2.13","tdb-1.3.0","tdb-1.3.1","tdb-1.3.10","tdb-1.3.11","tdb-1.3.12","tdb-1.3.13","tdb-1.3.14","tdb-1.3.15","tdb-1.3.16","tdb-1.3.17","tdb-1.3.18","tdb-1.3.2","tdb-1.3.3","tdb-1.3.4","tdb-1.3.5","tdb-1.3.6","tdb-1.3.7","tdb-1.3.8","tdb-1.3.9","tdb-1.4.0","tdb-1.4.1","tdb-1.4.2","tdb-1.4.3","tevent-0.10.0","tevent-0.10.1","tevent-0.10.2","tevent-0.9.11","tevent-0.9.12","tevent-0.9.13","tevent-0.9.14","tevent-0.9.15","tevent-0.9.16","tevent-0.9.17","tevent-0.9.18","tevent-0.9.19","tevent-0.9.20","tevent-0.9.21","tevent-0.9.22","tevent-0.9.23","tevent-0.9.24","tevent-0.9.25","tevent-0.9.26","tevent-0.9.27","tevent-0.9.28","tevent-0.9.29","tevent-0.9.30","tevent-0.9.31","tevent-0.9.32","tevent-0.9.33","tevent-0.9.34","tevent-0.9.35","tevent-0.9.36","tevent-0.9.37","tevent-0.9.38","tevent-0.9.39","tevent-0.9.8","upstream-1.4.0+git20101228.dfsg.1","upstream-1.4.0+git20110220.dfsg.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3671.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}