CVE-2021-3671

Description

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.13% Top 25%
Vendor Advisory debian.org
Affected: n/a Samba
Published at:
Updated at:

References

Link Tags
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 third party advisory patch
https://www.debian.org/security/2022/dsa-5287 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20221215-0002/ third party advisory
https://security.netapp.com/advisory/ntap-20230216-0008/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-3671?
CVE-2021-3671 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3671?
To fix CVE-2021-3671, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3671 being actively exploited in the wild?
It is possible that CVE-2021-3671 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3671?
CVE-2021-3671 affects n/a Samba.
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