vulnerability
Ubuntu: (Multiple Advisories) (CVE-2025-23048): Apache HTTP Server vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:N/C:C/I:C/A:N) | Jul 10, 2025 | Jul 17, 2025 | Aug 21, 2025 |
Severity
9
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:N)
Published
Jul 10, 2025
Added
Jul 17, 2025
Modified
Aug 21, 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.
Solution
ubuntu-pro-upgrade-apache2
References
- CVE-2025-23048
- https://attackerkb.com/topics/CVE-2025-23048
- CWE-284
- UBUNTU-USN-7639-1
- UBUNTU-USN-7639-2
- URL-https://httpd.apache.org/security/vulnerabilities_24.html
- URL-https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2025-23048
- URL-https://ubuntu.com/security/notices/USN-7639-1
- URL-https://www.cve.org/CVERecord?id=CVE-2025-23048
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