Detections
Analytics

Azure Linux 3.0 Security Update: samba (CVE-2021-3671)

medium Nessus Plugin ID 295682

Synopsis

The remote Azure Linux host is missing one or more security updates.

Description

The version of samba installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-3671 advisory.

 - 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.
 (CVE-2021-3671)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

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

Plugin Details

Severity: Medium

ID: 295682

File Name: azure_linux_CVE-2021-3671.nasl

Version: 1.1

Type: local

Published: 1/22/2026

Updated: 1/22/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2021-3671

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:microsoft:azure_linux:libsmbclient-devel, p-cpe:/a:microsoft:azure_linux:samba-debuginfo, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:samba-devel, p-cpe:/a:microsoft:azure_linux:ctdb, p-cpe:/a:microsoft:azure_linux:samba-dcerpc, p-cpe:/a:microsoft:azure_linux:samba, p-cpe:/a:microsoft:azure_linux:libwbclient-devel, p-cpe:/a:microsoft:azure_linux:samba-winbind-krb5-locator, p-cpe:/a:microsoft:azure_linux:samba-test-libs, p-cpe:/a:microsoft:azure_linux:samba-client, p-cpe:/a:microsoft:azure_linux:samba-common-tools, p-cpe:/a:microsoft:azure_linux:samba-test, p-cpe:/a:microsoft:azure_linux:python3-samba-test, p-cpe:/a:microsoft:azure_linux:samba-vfs-glusterfs, p-cpe:/a:microsoft:azure_linux:samba-winbind, p-cpe:/a:microsoft:azure_linux:libwbclient, p-cpe:/a:microsoft:azure_linux:samba-libs, p-cpe:/a:microsoft:azure_linux:samba-krb5-printing, p-cpe:/a:microsoft:azure_linux:libsmbclient, p-cpe:/a:microsoft:azure_linux:samba-common-libs, p-cpe:/a:microsoft:azure_linux:libnetapi, p-cpe:/a:microsoft:azure_linux:samba-pidl, p-cpe:/a:microsoft:azure_linux:samba-client-libs, p-cpe:/a:microsoft:azure_linux:samba-tools, p-cpe:/a:microsoft:azure_linux:libnetapi-devel, p-cpe:/a:microsoft:azure_linux:samba-common, p-cpe:/a:microsoft:azure_linux:python3-samba, p-cpe:/a:microsoft:azure_linux:samba-winbind-clients, p-cpe:/a:microsoft:azure_linux:samba-winbind-modules, p-cpe:/a:microsoft:azure_linux:samba-vfs-cephfs

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AzureLinux/release, Host/AzureLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/8/2024

Vulnerability Publication Date: 10/12/2021

Reference Information

CVE: CVE-2021-3671