CVE-2021-3671
MEDIUMSamba < 4.13.12 - Authenticated Denial of Service via Missing sname in TGS-REQ
Title source: llmDescription
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.
References (7)
Core 7
Core References
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5287
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
Patch, Third Party Advisory
https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221215-0002/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0008/
Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
Scores
CVSS v3
6.5
EPSS
0.0301
EPSS Percentile
86.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (6)
debian/debian_linux
10.0
debian/debian_linux
11.0
netapp/management_services_for_element_software
netapp/management_services_for_netapp_hci
netapp/ontap_select_deploy_administration_utility
samba/samba
< 4.13.12
Published
Oct 12, 2021
Tracked Since
Feb 18, 2026