Bug 1291578 (CVE-2015-7204)

Summary: CVE-2015-7204 Mozilla: Crash with JavaScript variable assignment with unboxed objects (MFSA 2015-135)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jrusnack, security-response-team
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2015-12-16 09:03:17 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 1290704    

Description Huzaifa S. Sidhpurwala 2015-12-15 08:24:39 UTC 
Security researcher Cajus Pollmeier reported that Firefox 41 was crashing during some Javascript variable assignments. The issue was caused by an implementation error with unboxed objects and property storing in the JavaScript engine. This error could result in a potentially exploitable crash when triggered by JavaScript content as well as leading to errors on some websites.

This crash was caused by a change to the JavaScript engine was first shipped in Firefox 41. Earlier versions of Firefox are unaffected by this problem, including Firefox ESR 38.


External Reference:

https://www.mozilla.org/security/announce/2015/mfsa2015-135.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Cajus Pollmeier as the original reporter.

Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.