Amazon Linux 2023 : php8.4, php8.4-bcmath, php8.4-cli (ALAS2023-2026-2042)

critical Nessus Plugin ID 331985

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2042 advisory.

Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.* before 8.5.9. (CVE-2026-17543)

Circular symbolic links in phar archives could lead to unbounded recursion, exhausting the C stack and crashing the PHP process, in PHP versions from 8.2.* before 8.2.33, from 8.3.* before 8.3.33, from 8.4.* before 8.4.24, and from 8.5.* before 8.5.9. (CVE-2026-7260)

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 php8.4 --releasever 2023.12.20260803' or or 'dnf update --advisory ALAS2023-2026-2042 --releasever 2023.12.20260803' to update your system.

Plugin Details

Severity: Critical

ID: 331985

File Name: al2023_ALAS2023-2026-2042.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 8/4/2026

Updated: 8/4/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.83

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-7260

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-17543

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:php8.4-bcmath-debuginfo, p-cpe:/a:amazon:linux:php8.4-bcmath, p-cpe:/a:amazon:linux:php8.4-cli-debuginfo, p-cpe:/a:amazon:linux:php8.4-cli, p-cpe:/a:amazon:linux:php8.4-common-debuginfo, p-cpe:/a:amazon:linux:php8.4-common, p-cpe:/a:amazon:linux:php8.4-dba-debuginfo, p-cpe:/a:amazon:linux:php8.4-dba, p-cpe:/a:amazon:linux:php8.4-dbg-debuginfo, p-cpe:/a:amazon:linux:php8.4-dbg, p-cpe:/a:amazon:linux:php8.4-debuginfo, p-cpe:/a:amazon:linux:php8.4-debugsource, p-cpe:/a:amazon:linux:php8.4-devel, p-cpe:/a:amazon:linux:php8.4-embedded-debuginfo, p-cpe:/a:amazon:linux:php8.4-embedded, p-cpe:/a:amazon:linux:php8.4-enchant-debuginfo, p-cpe:/a:amazon:linux:php8.4-enchant, p-cpe:/a:amazon:linux:php8.4-ffi-debuginfo, p-cpe:/a:amazon:linux:php8.4-ffi, p-cpe:/a:amazon:linux:php8.4-fpm-debuginfo, p-cpe:/a:amazon:linux:php8.4-fpm, p-cpe:/a:amazon:linux:php8.4-gd-debuginfo, p-cpe:/a:amazon:linux:php8.4-gd, p-cpe:/a:amazon:linux:php8.4-gmp-debuginfo, p-cpe:/a:amazon:linux:php8.4-gmp, p-cpe:/a:amazon:linux:php8.4-intl-debuginfo, p-cpe:/a:amazon:linux:php8.4-intl, p-cpe:/a:amazon:linux:php8.4-ldap-debuginfo, p-cpe:/a:amazon:linux:php8.4-ldap, p-cpe:/a:amazon:linux:php8.4-mbstring-debuginfo, p-cpe:/a:amazon:linux:php8.4-mbstring, p-cpe:/a:amazon:linux:php8.4-modphp-debuginfo, p-cpe:/a:amazon:linux:php8.4-modphp, p-cpe:/a:amazon:linux:php8.4-mysqlnd-debuginfo, p-cpe:/a:amazon:linux:php8.4-mysqlnd, p-cpe:/a:amazon:linux:php8.4-odbc-debuginfo, p-cpe:/a:amazon:linux:php8.4-odbc, p-cpe:/a:amazon:linux:php8.4-opcache-debuginfo, p-cpe:/a:amazon:linux:php8.4-opcache, p-cpe:/a:amazon:linux:php8.4-pdo-debuginfo, p-cpe:/a:amazon:linux:php8.4-pdo, p-cpe:/a:amazon:linux:php8.4-pgsql-debuginfo, p-cpe:/a:amazon:linux:php8.4-pgsql, p-cpe:/a:amazon:linux:php8.4-process-debuginfo, p-cpe:/a:amazon:linux:php8.4-process, p-cpe:/a:amazon:linux:php8.4-snmp-debuginfo, p-cpe:/a:amazon:linux:php8.4-snmp, p-cpe:/a:amazon:linux:php8.4-soap-debuginfo, p-cpe:/a:amazon:linux:php8.4-soap, p-cpe:/a:amazon:linux:php8.4-sodium-debuginfo, p-cpe:/a:amazon:linux:php8.4-sodium, p-cpe:/a:amazon:linux:php8.4-tidy-debuginfo, p-cpe:/a:amazon:linux:php8.4-tidy, p-cpe:/a:amazon:linux:php8.4-xml-debuginfo, p-cpe:/a:amazon:linux:php8.4-xml, p-cpe:/a:amazon:linux:php8.4-zip-debuginfo, p-cpe:/a:amazon:linux:php8.4-zip, p-cpe:/a:amazon:linux:php8.4

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2026

Vulnerability Publication Date: 7/28/2026

Reference Information

CVE: CVE-2026-17543, CVE-2026-7260

Detections

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