Amazon Linux 2023 : httpd, httpd-core, httpd-devel (ALAS2023-2025-1125)

critical Nessus Plugin ID 243478

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Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1125 advisory.

HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the Content-Type response headers of applications hosted or proxied by the server can split the HTTP response.

This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did not address the issue.

Users are recommended to upgrade to version 2.4.64, which fixes this issue. (CVE-2024-42516)

SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker. Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request.

Users are recommended to upgrade to version 2.4.64 which fixes this issue. (CVE-2024-43204)

Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations.

In a logging configuration where CustomLog is used with %{varname}x or %{varname}c to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files. (CVE-2024-47252)

In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption.

Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host. (CVE-2025-23048)

In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.

Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to on. (CVE-2025-49630)

In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.

Only configurations using SSLEngine optional to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade. (CVE-2025-49812)

Late Release of Memory after Effective Lifetime vulnerability in Apache HTTP Server.

This issue affects Apache HTTP Server: from 2.4.17 up to 2.4.63.

Users are recommended to upgrade to version 2.4.64, which fixes the issue. (CVE-2025-53020)

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 httpd --releasever 2023.8.20250808' to update your system.

Plugin Details

Severity: Critical

ID: 243478

File Name: al2023_ALAS2023-2025-1125.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 8/4/2025

Updated: 8/14/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2025-23048

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:mod_ssl-debuginfo, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:httpd-tools-debuginfo, p-cpe:/a:amazon:linux:mod_lua-debuginfo, p-cpe:/a:amazon:linux:httpd-core, p-cpe:/a:amazon:linux:mod_ldap, p-cpe:/a:amazon:linux:mod_ssl, p-cpe:/a:amazon:linux:mod_proxy_html-debuginfo, p-cpe:/a:amazon:linux:httpd-filesystem, p-cpe:/a:amazon:linux:mod_lua, p-cpe:/a:amazon:linux:mod_ldap-debuginfo, p-cpe:/a:amazon:linux:httpd, p-cpe:/a:amazon:linux:mod_proxy_html, p-cpe:/a:amazon:linux:httpd-debugsource, p-cpe:/a:amazon:linux:httpd-tools, p-cpe:/a:amazon:linux:mod_session, p-cpe:/a:amazon:linux:httpd-devel, p-cpe:/a:amazon:linux:httpd-debuginfo, p-cpe:/a:amazon:linux:httpd-manual, p-cpe:/a:amazon:linux:mod_session-debuginfo, p-cpe:/a:amazon:linux:httpd-core-debuginfo

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: 7/8/2025

Reference Information

CVE: CVE-2024-42516, CVE-2024-43204, CVE-2024-47252, CVE-2025-23048, CVE-2025-49630, CVE-2025-49812, CVE-2025-53020

Detections

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