Improper Access Control Affecting apache2 package, versions <2.4.41-4ubuntu3.23+esm2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.97% (58th percentile)

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  • Snyk IDSNYK-UBUNTU2004-APACHE2-10721859
  • published21 Aug 2025
  • disclosed10 Jul 2025

Introduced: 10 Jul 2025

CVE-2025-23048  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 apache2 to version 2.4.41-4ubuntu3.23+esm2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1