CVE-2021-3671
MEDIUM severity · CVSS 6.5 · CWE-476
6.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a ↗
Additional information
- NVD record
- https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83aPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
- https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
- https://lists.debian.org/debian-lts-announce/2022/11/msg00034.htmlAdvisory
- https://security.netapp.com/advisory/ntap-20221215-0002/Advisory
- https://security.netapp.com/advisory/ntap-20230216-0008/Advisory
- https://www.debian.org/security/2022/dsa-5287Advisory