Detections
Analytics
Amazon Linux 2023 : firefox (ALAS2023-2026-1518)
medium Nessus Plugin ID 304582
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1518 advisory.A flaw was found in libexpat. A remote attacker could exploit this vulnerability by providing specially crafted XML content with empty external parameter entities. This could lead to a NULL pointer dereference, causing the application to crash and resulting in a Denial of Service (DoS). (CVE-2026-32776)
A flaw was found in libexpat. A remote attacker could exploit this vulnerability by providing specially crafted Document Type Definition (DTD) content. This could lead to an infinite loop during parsing, resulting in a Denial of Service (DoS) for the application using libexpat. (CVE-2026-32777)
A flaw was found in libexpat. This vulnerability allows an attacker to trigger a NULL pointer dereference in the `setContext` function. This occurs when the system attempts to retry an operation after an out-of- memory condition, which can lead to a Denial of Service (DoS) for the affected application.
(CVE-2026-32778)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update firefox --releasever 2023.10.20260330' or or 'dnf update --advisory ALAS2023-2026-1518 --releasever 2023.10.20260330' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1518.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-32776.html
Plugin Details
Severity: Medium
ID: 304582
File Name: al2023_ALAS2023-2026-1518.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 4/1/2026
Updated: 4/1/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.6
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C
CVSS Score Source: CVE-2026-32778
CVSS v3
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:firefox, p-cpe:/a:amazon:linux:firefox-debugsource, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:firefox-debuginfo
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/1/2026
Vulnerability Publication Date: 3/16/2026