vulnerability
Ubuntu: (Multiple Advisories) (CVE-2025-49812): Apache HTTP Server vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:N/C:C/I:C/A:N) | Jul 10, 2025 | Jul 17, 2025 | Aug 21, 2025 |
Severity
9
CVSS
(AV:N/AC:M/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 versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.
Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.
Solution
ubuntu-pro-upgrade-apache2
References
- CVE-2025-49812
- https://attackerkb.com/topics/CVE-2025-49812
- CWE-287
- 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-2025-49812
- URL-https://ubuntu.com/security/notices/USN-7639-1
- URL-https://www.cve.org/CVERecord?id=CVE-2025-49812
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