SB2025080477 - SUSE update for apache2
Published: August 4, 2025 Updated: January 4, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) HTTP response splitting (CVE-ID: CVE-2024-42516)
The vulnerability allows a remote attacker to perform HTTP splitting attacks.
The vulnerability exists due to software does not correctly process CRLF character sequences. A remote attacker with ability to manipulate the Content-Type response headers of applications hosted or proxied by the server can send specially crafted request containing CRLF sequence and make the application to send a split HTTP response.
Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.
Note, this vulnerability exists due a missing fix for #VU88151 (CVE-2023-38709).
2) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2024-43204)
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input in mod_proxy . A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Note, the vulnerability exploitation 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.
3) Improper Encoding or Escaping of Output (CVE-ID: CVE-2024-47252)
The vulnerability allows a remote attacker to manipulate data in log files.
The vulnerability exists due to improper input validation in mod_ssl. 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. A remote attacker can manipulate contents of log files.
4) Security features bypass (CVE-ID: CVE-2025-23048)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to access control bypass with session resumption in mod_ssl. A remote attacker can use the TLS 1.3 session resumption to bypass implemented access control.
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.
5) Resource management error (CVE-ID: CVE-2025-49630)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources in mod_proxy_http2. A remote attacker can send specially crafted requests to the server and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that the reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".
6) Cryptographic issues (CVE-ID: CVE-2025-49812)
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to he way certain mod_ssl configurations handle TLS upgrades. A remote attacker can launch an HTTP desynchronisation attack, which allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.
Note, only configurations using "SSLEngine optional" to enable TLS upgrades are affected.
7) Resource management error (CVE-ID: CVE-2025-53020)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the server when handling HTTP/2 requests. A remote attacker can send multiple requests to the server and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.