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Category:   Application (Web Browser)  >   Mozilla Firefox Vendors:   Mozilla.org
(Ubuntu Issues Fix) Mozilla Firefox HTTP/2 Alt-Svc Header Processing Bug Lets Remote Users Bypass Certificate Verification
SecurityTracker Alert ID:  1032035
SecurityTracker URL:  http://securitytracker.com/id/1032035
CVE Reference:   CVE-2015-0799   (Links to External Site)
Date:  Apr 7 2015
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 37.0.1
Description:   A vulnerability was reported in Mozilla Firefox. A remote user can bypass certificate verification.

A remote user with the ability to conduct a man-in-the-middle attack can trigger a flaw in the Firefox HTTP Alternative Services implementation by specifying an Alt-Svc header to bypass SSL certificate verification and impersonate the target site.

Muneaki Nishimura reported this vulnerability.

Impact:   A remote user with the ability to conduct a man-in-the-middle attack can bypass certificate verification.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2557-1

Vendor URL:  www.mozilla.org/en-US/security/advisories/mfsa2015-44/ (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 LTS, 14.04 LTS, 14.10

Message History:   This archive entry is a follow-up to the message listed below.
Apr 7 2015 Mozilla Firefox HTTP/2 Alt-Svc Header Processing Bug Lets Remote Users Bypass Certificate Verification



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