vulnerability
Apache HTTPD: Apache HTTP Server: mod_ssl access control bypass with session resumption (CVE-2025-23048)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:N/C:C/I:C/A:N) | Jul 10, 2025 | Jul 18, 2025 | Nov 6, 2025 |
Severity
9
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:N)
Published
Jul 10, 2025
Added
Jul 18, 2025
Modified
Nov 6, 2025
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.
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.
Solution
apache-httpd-upgrade-latest
References
- URL-http://www.openwall.com/lists/oss-security/2025/07/10/2
- URL-http://www.openwall.com/lists/oss-security/2025/07/10/8
- URL-https://httpd.apache.org/security/vulnerabilities_24.html
- URL-https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
- CVE-2025-23048
- https://attackerkb.com/topics/CVE-2025-23048
- CWE-284
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