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Bug 859827 (CVE-2012-3977)

Summary: CVE-2012-3977 Mozilla: SPDY information disclosure (MFSA 2012-73)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: caillon+fedoraproject, gecko-bugs-nobody, kengert
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20120922,reported=20120924,source=mozilla,cvss2=4.3/AV:N/AC:M/Au:N/C:P/I:N/A:N,rhel-5/firefox=notaffected,rhel-6/firefox=notaffected,fedora-all/firefox=affected,fedora-all/thunderbird=affected,fedora-all/seamonkey=affected
Fixed In Version: firefox 15, seamonkey 2.12 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-09-24 02:51:40 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On:    
Bug Blocks: 855407    

Description Huzaifa S. Sidhpurwala 2012-09-24 02:44:50 EDT
Security researchers Thai Duong and Juliano Rizzo reported that SPDY's request header compression leads to information leakage, which can allow the extraction of private data such as session cookies, even over an encrypted SSL connection. 

Comment 1 Huzaifa S. Sidhpurwala 2012-09-24 02:46:04 EDT
Red Hat Enterprise Linux 5 and 6 currently contain Mozilla Firefox version 10.0.x ESR.  Those versions:

- do not request the use of zlib compression in the SSL/TLS protocol
- do not support SPDY protocol

(See bug 857051, comment 4 and bug 857737 for more details).


This issue did not affect the version of Firefox and Thunderbird packages as shipped with Red Hat Enterprise Linux 5 and 6.
Comment 2 Huzaifa S. Sidhpurwala 2012-09-24 02:50:57 EDT
This issue affects the version of Firefox, Thunderbird and Seamonkey as shipped with Fedora-16 and Fedora-17.

This issue was addressed via the following fedora security advisories which updates Firefox and Thunderbird to version 15.0 and seamonkey to version 2.12:



Comment 3 Tomas Hoger 2012-09-24 03:41:27 EDT
Mozilla security advisory:

The assignment is a duplicate of the Mitre assigned CVE-2012-4930.

*** This bug has been marked as a duplicate of bug 857737 ***