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CVE-2021-3671

Date: October 11, 2021

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.

Language: C

Severity Score

6.5

Related Resources (16)

Url: https://github.com/samba-team/samba/commit/0cb4b939f192376bf5e33637863a91a20f74c5a5

Url: https://bugzilla.redhat.com/show_bug.cgi?id=2013080,

Url: https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C

Url: https://bugzilla.samba.org/show_bug.cgi?id=14770,

Url: https://bugzilla.samba.org/show_bug.cgi?id=14770%2C

Url: https://security-tracker.debian.org/tracker/CVE-2021-3671

Url: https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html

Url: https://security.alpinelinux.org/vuln/CVE-2021-3671

Url: https://security.netapp.com/advisory/ntap-20221215-0002/

Url: https://security.netapp.com/advisory/ntap-20230216-0008/

Url: https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a

Url: https://bugzilla.samba.org/show_bug.cgi?id=14770

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-3671

Url: https://www.debian.org/security/2022/dsa-5287

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3671

Url: https://www.mend.io/vulnerability-database/CVE-2021-3671

Severity Score

6.5

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	SINGLE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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