Detections
Analytics

Azure Linux 3.0 Security Update: bind (CVE-2025-40775)

high Nessus Plugin ID 295766

Synopsis

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

Description

The version of bind 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-2025-40775 advisory.

 - When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.
 (CVE-2025-40775)

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-2025-40775

Plugin Details

Severity: High

ID: 295766

File Name: azure_linux_CVE-2025-40775.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: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-40775

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:bind-dlz-mysql, p-cpe:/a:microsoft:azure_linux:bind-license, p-cpe:/a:microsoft:azure_linux:bind-dnssec-doc, p-cpe:/a:microsoft:azure_linux:bind-dlz-sqlite3, p-cpe:/a:microsoft:azure_linux:bind-libs, p-cpe:/a:microsoft:azure_linux:bind, p-cpe:/a:microsoft:azure_linux:bind-dlz-filesystem, p-cpe:/a:microsoft:azure_linux:bind-chroot, p-cpe:/a:microsoft:azure_linux:bind-devel, p-cpe:/a:microsoft:azure_linux:bind-utils, p-cpe:/a:microsoft:azure_linux:bind-dnssec-utils, p-cpe:/a:microsoft:azure_linux:bind-dlz-ldap, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:python3-bind, p-cpe:/a:microsoft:azure_linux:bind-debuginfo

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: 7/8/2025

Vulnerability Publication Date: 5/21/2025

Reference Information

CVE: CVE-2025-40775

IAVA: 2025-A-0375-S