ALAS2023-2025-1125

References: CVE-2024-42516  CVE-2024-43204  CVE-2024-47252  CVE-2025-23048  CVE-2025-49630  CVE-2025-49812  CVE-2025-53020 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

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)

Issue Correction:
Run dnf update httpd --releasever 2023.8.20250808 or dnf update --advisory ALAS2023-2025-1125 --releasever 2023.8.20250808 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:

aarch64:
    mod_session-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    mod_proxy_html-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    httpd-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    mod_ssl-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    mod_ldap-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    mod_session-2.4.64-1.amzn2023.0.1.aarch64
    httpd-2.4.64-1.amzn2023.0.1.aarch64
    httpd-tools-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    mod_ldap-2.4.64-1.amzn2023.0.1.aarch64
    httpd-tools-2.4.64-1.amzn2023.0.1.aarch64
    httpd-devel-2.4.64-1.amzn2023.0.1.aarch64
    mod_lua-2.4.64-1.amzn2023.0.1.aarch64
    mod_ssl-2.4.64-1.amzn2023.0.1.aarch64
    mod_proxy_html-2.4.64-1.amzn2023.0.1.aarch64
    mod_lua-debuginfo-2.4.64-1.amzn2023.0.1.aarch64
    httpd-debugsource-2.4.64-1.amzn2023.0.1.aarch64
    httpd-core-2.4.64-1.amzn2023.0.1.aarch64
    httpd-core-debuginfo-2.4.64-1.amzn2023.0.1.aarch64

noarch:
    httpd-filesystem-2.4.64-1.amzn2023.0.1.noarch
    httpd-manual-2.4.64-1.amzn2023.0.1.noarch

src:
    httpd-2.4.64-1.amzn2023.0.1.src

x86_64:
    mod_session-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    httpd-tools-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    mod_proxy_html-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    httpd-tools-2.4.64-1.amzn2023.0.1.x86_64
    mod_session-2.4.64-1.amzn2023.0.1.x86_64
    mod_ldap-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    httpd-debugsource-2.4.64-1.amzn2023.0.1.x86_64
    mod_proxy_html-2.4.64-1.amzn2023.0.1.x86_64
    httpd-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    mod_lua-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    httpd-2.4.64-1.amzn2023.0.1.x86_64
    httpd-devel-2.4.64-1.amzn2023.0.1.x86_64
    mod_ssl-2.4.64-1.amzn2023.0.1.x86_64
    mod_ssl-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    mod_ldap-2.4.64-1.amzn2023.0.1.x86_64
    mod_lua-2.4.64-1.amzn2023.0.1.x86_64
    httpd-core-debuginfo-2.4.64-1.amzn2023.0.1.x86_64
    httpd-core-2.4.64-1.amzn2023.0.1.x86_64