CVE-2021-3671
Moderate
CVE-2021-3671
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.
Exploit probability
2.2%
Published
October 12, 2021
Required by
Not available
Last source change
July 9, 2026
02 / AFFECTED SOFTWARE
Affected packages
200 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2021-3671
View original source
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.
05 / REFERENCES
Further evidence
- https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
- https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
- https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a
- https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
- https://security.netapp.com/advisory/ntap-20221215-0002/
- https://security.netapp.com/advisory/ntap-20230216-0008/
- https://www.debian.org/security/2022/dsa-5287