Home/CVE/A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting
CVE

CVE-2021-3671

A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting

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.

MEDIUM · CVSS 6.5 EPSS 0.05139
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  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

6
samba< 4.13.12
samba>= 4.14.0 and < 4.14.8
debian linuxall versions
netapp management services for element softwareall versions
netapp management services for netapp hciall versions
netapp ontap select deploy administration utilityall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Oct 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

7
msrcCVE-2021-3671
suse-csafopenSUSE-SU-2024:12580-1
suse-csafopenSUSE-SU-2023:0019-1
suse-csafopenSUSE-SU-2023:0020-1
usnUSN-5675-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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/04171147948d0a3636bc6374181926f0fb2ec83aPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.htmlMailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20221215-0002/Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0008/Third Party Advisory
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