Updated: 2025-08-20 03:18:32.958503
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.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | NONE | 0.0 |
| CVSS Version 3.x | HIGH | 7.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | httpd | 2.4.53 | 7.5 | HIGH | Released | CLSA-2025:1757501175 | 2025-09-10 13:43:47 | |
| CentOS 6 ELS | httpd | 2.2.15 | 7.5 | HIGH | Released | CLSA-2025:1758035415 | 2025-09-26 01:52:48 | |
| CentOS 7 ELS | httpd | 2.4.6 | 7.5 | HIGH | Released | CLSA-2025:1758035329 | 2025-09-26 01:52:41 | |
| CentOS 8.4 ELS | httpd | 2.4.37 | 7.5 | HIGH | Released | CLSA-2025:1758914697 | 2025-09-26 23:51:12 | |
| CentOS 8.5 ELS | httpd | 2.4.37 | 7.5 | HIGH | Released | CLSA-2025:1758915354 | 2025-09-26 23:51:11 | |
| CentOS Stream 8 ELS | httpd | 2.4.37 | 7.5 | HIGH | Released | CLSA-2025:1758914381 | 2025-09-26 23:51:13 | |
| CloudLinux 7 ELS | httpd | 2.4.6 | 7.5 | HIGH | Released | CLSA-2025:1758102473 | 2025-09-30 05:33:16 | |
| Oracle Linux 6 ELS | httpd | 2.2.15 | 7.5 | HIGH | Released | CLSA-2025:1758031207 | 2025-09-16 22:33:31 | |
| Oracle Linux 7 ELS | httpd | 2.4.6 | 7.5 | HIGH | Released | CLSA-2025:1758031199 | 2025-09-16 22:33:30 | |
| RHEL 7 ELS | httpd | 2.4.6 | 7.5 | HIGH | Released | CLSA-2025:1758031287 | 2025-09-16 22:33:28 |