CVE-2021-3671

moderate-risk
Published 2021-10-12

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.

Do I need to act?

~
3.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (6)

Management Services For Netapp Hci

Affected Vendors

Debian Samba Netapp

References (14)

https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
Patch https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec8...
Mailing List https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20221215-0002/
Third Party Advisory https://security.netapp.com/advisory/ntap-20230216-0008/
Third Party Advisory https://www.debian.org/security/2022/dsa-5287
https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
Patch https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec8...
Mailing List https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
Third Party Advisory https://security.netapp.com/advisory/ntap-20221215-0002/
Third Party Advisory https://security.netapp.com/advisory/ntap-20230216-0008/
Third Party Advisory https://www.debian.org/security/2022/dsa-5287
43
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 6/34 · Minimal
Exposure 13/34 · Low