CVE-2025-49812
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- CVE-2025-49812
CVE Details
| Release Date: | 2025-07-10 | |
| Impact: | Moderate | What is this? |
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.
See more information about CVE-2025-49812 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 7.5 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | None |
| Scope: | Unchanged |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 10 (httpd) | ELSA-2025-15095 | 2025-09-03 |
| Oracle Linux version 8 (httpd) | ELSA-2025-15123 | 2025-09-04 |
| Oracle Linux version 8 (mod_http2) | ELSA-2025-15123 | 2025-09-04 |
| Oracle Linux version 8 (mod_md) | ELSA-2025-15123 | 2025-09-04 |
| Oracle Linux version 9 (httpd) | ELSA-2025-15023 | 2025-09-02 |
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