CVE-2025-23048

Description

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.

PUBLISHED Reserved 2025-01-10 | Published 2025-07-10 | Updated 2026-02-26 | Assigner apache

Problem types

CWE-284 Improper Access Control

Product status

Timeline

Credits

Sven Hebrok, Felix Cramer, Tim Storm, Maximilian Radoy, and Juraj Somorovsky at Paderborn University finder

References

lists.debian.org/debian-lts-announce/2025/08/msg00009.html

www.openwall.com/lists/oss-security/2025/07/10/2

www.openwall.com/lists/oss-security/2025/07/10/8

httpd.apache.org/security/vulnerabilities_24.html vendor-advisory

cve.org (CVE-2025-23048)

nvd.nist.gov (CVE-2025-23048)

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