Bug 863622 (CVE-2012-3994)

Summary: CVE-2012-3994 Mozilla: top object and location property accessible by plugins (MFSA 2012-82)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: gecko-bugs-nobody, jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20121009,reported=20121006,source=mozilla,cvss2=4.3/AV:N/AC:M/Au:N/C:N/I:P/A:N,rhel-5/firefox=affected,rhel-6/firefox=affected,rhel-5/thunderbird=affected,rhel-6/thunderbird=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-10-10 05:07:28 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On:    
Bug Blocks: 852611    

Description Huzaifa S. Sidhpurwala 2012-10-06 01:14:02 EDT
Security researcher Mariusz Mlynski reported that the location property can be accessed by binary plugins through top.location and top can be shadowed by Object.defineProperty as well. This can allow for possible cross-site scripting (XSS) attacks through plugins.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.


External Reference:

http://www.mozilla.org/security/announce/2012/mfsa2012-82.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Mariusz Mlynski as the original reporter
Comment 1 errata-xmlrpc 2012-10-09 18:33:24 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1351 https://rhn.redhat.com/errata/RHSA-2012-1351.html
Comment 2 errata-xmlrpc 2012-10-09 18:54:00 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1350 https://rhn.redhat.com/errata/RHSA-2012-1350.html