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ALSA-2025:15023 — Moderate: httpd security update

Affected: AlmaLinux:9: httpd, AlmaLinux:9: httpd-core, AlmaLinux:9: httpd-devel, AlmaLinux:9: httpd-filesystem, AlmaLinux:9: httpd-manual, AlmaLinux:9: httpd-tools, AlmaLinux:9: mod_ldap, AlmaLinux:9: mod_lua, AlmaLinux:9: mod_proxy_html, AlmaLinux:9: mod_session and 1 more

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

* httpd: insufficient escaping of user-supplied data in mod_ssl (CVE-2024-47252) * httpd: mod_ssl: access control bypass by trusted clients is possible using TLS 1.3 session resumption (CVE-2025-23048) * httpd: HTTP Session Hijack via a TLS upgrade (CVE-2025-49812)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-08696

BELL-CVE-2025-49812

Affected: Alpaquita:23: apache2, Alpaquita:25: apache2, Alpaquita:stream: apache2

BIT-apache-2025-49812 — Apache HTTP Server: mod_ssl TLS upgrade attack

Affected: Bitnami: apache

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.

certfr-2025-avi-0586 — De multiples vulnérabilités ont été découvertes dans Apache HTTP Server. Certaines d'entre elles permettent à un attaqu…

certfr-2025-avi-0586

cnvd-2025-16611

EUVD-2026-259972

fkie_cve-2025-49812

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.

GHSA-2mcx-3xj5-wg86

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.

msrc_CVE-2025-49812 — Apache HTTP Server: mod_ssl TLS upgrade attack

msrc_CVE-2025-49812

OESA-2025-2168 — httpd security update

Affected: openEuler:20.03-LTS-SP4: httpd

Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server. Security Fix(es):

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 th…

openSUSE-SU-2025:15360-1 — apache2-2.4.64-1.1 on GA media

apache2-2.4.64-1.1 on GA media

RHSA-2025:13680 — Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update

httpd: insufficient escaping of user-supplied data in mod_ssl httpd: mod_ssl: access control bypass by trusted clients is possible using TLS 1.3 session resumption modsecurity: ModSecurity Has Possible DoS Vulnerability httpd: mod_proxy_http2: untrusted input from a client causes an assertion to fail in the Apache mod_proxy_http2 module httpd: HTTP Session Hijack via a TLS upgrade

SUSE-SU-2025:02565-1 — Security update for apache2

Security update for apache2

UBUNTU-CVE-2025-49812

Affected: Ubuntu:Pro:14.04:LTS: apache2, Ubuntu:Pro:16.04:LTS: apache2, Ubuntu:Pro:18.04:LTS: apache2, Ubuntu:Pro:20.04:LTS: apache2, Ubuntu:22.04:LTS: apache2, Ubuntu:24.04:LTS: apache2

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.

WID-SEC-W-2025-1529 — Apache HTTP Server: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apache HTTP Server ausnutzen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um Dateien zu manipulieren.