Bug 2374580 (CVE-2025-49812) - CVE-2025-49812 httpd: HTTP Session Hijack via a TLS upgrade
Summary: CVE-2025-49812 httpd: HTTP Session Hijack via a TLS upgrade
Keywords:
Status: NEW
Alias: CVE-2025-49812
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-06-24 13:49 UTC by OSIDB Bzimport
Modified: 2025-07-15 06:06 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2025-06-24 13:49:50 UTC 
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. Upstream recommends users to upgrade to version 2.4.64,
which removes support for TLS upgrade.
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