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Amazon Linux 2023 : bind, bind-chroot, bind-devel (ALAS2023-2025-1105)

high Nessus Plugin ID 243485

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1105 advisory.

 If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer- client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure.This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1. (CVE-2025-40777)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'dnf update bind --releasever 2023.8.20250721' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2025-1105.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2025-40777.html

Plugin Details

Severity: High

ID: 243485

File Name: al2023_ALAS2023-2025-1105.nasl

Version: 1.1

Type: local

Agent: unix

Published: 8/4/2025

Updated: 8/4/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2025-40777

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:amazon:linux:bind-libs-debuginfo, p-cpe:/a:amazon:linux:bind-dnssec-utils-debuginfo, p-cpe:/a:amazon:linux:bind-utils-debuginfo, p-cpe:/a:amazon:linux:bind-debugsource, p-cpe:/a:amazon:linux:bind-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:bind-chroot, p-cpe:/a:amazon:linux:bind-devel, p-cpe:/a:amazon:linux:bind-dnssec-utils, p-cpe:/a:amazon:linux:bind-license, p-cpe:/a:amazon:linux:bind-utils, p-cpe:/a:amazon:linux:bind-libs, p-cpe:/a:amazon:linux:bind, p-cpe:/a:amazon:linux:bind-doc

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2025

Vulnerability Publication Date: 7/16/2025

Reference Information

CVE: CVE-2025-40777

IAVA: 2025-A-0534