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.

INFO

Published Date :

2025-07-10T16:58:23.943Z

Last Modified :

2025-11-04T21:11:18.699Z

Source :

apache
AFFECTED PRODUCTS

The following products are affected by CVE-2025-49812 vulnerability.

Vendors Products
Apache
  • Http Server
Apache Software Foundation
  • Apache Http Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-49812.

URL Resource
http://www.openwall.com/lists/oss-security/2025/07/09/3 cve-icon
http://www.openwall.com/lists/oss-security/2025/07/10/2 cve-icon
http://www.openwall.com/lists/oss-security/2025/07/10/9 cve-icon
https://httpd.apache.org/security/vulnerabilities_24.html cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-49812 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-49812 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact