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Category:   Application (Web Server/CGI)  >   nginx Vendors:   nginx.org
nginx SSL Session Cache Reuse May Let Remote Users Hijack Sessions Across Virtual Hosts
SecurityTracker Alert ID:  1030882
SecurityTracker URL:  http://securitytracker.com/id/1030882
CVE Reference:   CVE-2014-3616   (Links to External Site)
Date:  Sep 22 2014
Impact:   Disclosure of authentication information, Disclosure of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.5.6 to 1.7.4
Description:   A vulnerability was reported in nginx. A remote user may be able to bypass certificate validation or hijack sessions in certain cases.

When virtual hosts are used and the same shared ssl_session_cache or ssl_session_ticket_key values are used for multiple server blocks, a remote user in a privileged network position can cause cached SSL sessions to be reused in a different domain (e.g., "virtual host confusion"). This can be exploited to obtain authentication cookies, hijack sessions, or bypass certificate validation.

The original advisory is available at:

http://bh.ht.vc/vhost_confusion.pdf

Antoine Delignat-Lavaud and Karthikeyan Bhargavan reported this vulnerability.

Impact:   A remote user may be able to obtain authentication cookies, hijack sessions, or bypass certificate validation.
Solution:   The vendor has issued a fix (1.6.2, 1.7.5).

The vendor's advisory is available at:

http://nginx.org/en/security_advisories.html

Vendor URL:  nginx.org/ (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any)

Message History:   None.


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