Detections
Analytics

Azure Linux 3.0 Security Update: samba (CVE-2020-27840)

high Nessus Plugin ID 295342

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-2020-27840 advisory.

 - A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
 (CVE-2020-27840)

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-2020-27840

Plugin Details

Severity: High

ID: 295342

File Name: azure_linux_CVE-2020-27840.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: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-27840

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 5/13/2025

Vulnerability Publication Date: 3/24/2021

Reference Information

CVE: CVE-2020-27840

IAVA: 2021-A-0140-S