Amazon Linux 2 : firefox (ALASFIREFOX-2026-068)

medium Nessus Plugin ID 371772

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of firefox installed on the remote host is prior to 153.5.1-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2FIREFOX-2026-068 advisory.

Mozilla blocked compromised intermediate eMudhra certificates via OneCRL on the 17th of October which was distributed to clients via RemoteSettings the same day. This update contains the updated OneCRL block list, ensuring clients will block the compromised certificates even if RemoteSettings is disabled by policy or otherwise unavailable in the user's network environment. This vulnerability was fixed in Firefox 158.0.1, Firefox ESR 153.5.1, and Firefox ESR 115.43.1.

The ca-certificates package contains the set of system-wide trusted Root CA certificates. The ca- certificates package is not itself vulnerable because it contains no compromised certificates, but it does include the eMudhra root CAs that signed the compromised intermediate certificates. Because those roots are trust anchors for the intermediates, Amazon Linux will remove the affected eMudhra root certificates from the package. After updating, certificates that chain to the removed roots will no longer be trusted.
Customers are advised to update ca-certificates as soon as the fixed package is available.
(CVE-2026-113470)

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 'yum update firefox' or or 'yum update --advisory ALAS2FIREFOX-2026-068' to update your system.

Plugin Details

Severity: Medium

ID: 371772

File Name: al2_ALASFIREFOX-2026-068.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/24/2026

Updated: 10/24/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 8.26

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-113470

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:firefox

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/24/2026

Vulnerability Publication Date: 10/15/2026

Reference Information

CVE: CVE-2026-113470

IAVA: 2026-A-1136

Detections

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