Bug 840212 (CVE-2012-1959)

Summary: CVE-2012-1959 Mozilla: Same-compartment Security Wrappers can be bypassed (MFSA 2012-49)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: urgent Docs Contact:
Priority: urgent    
Version: unspecifiedCC: gecko-bugs-nobody, jhorak, security-response-team, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2012-07-18 07:30:24 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 835033    

Description Huzaifa S. Sidhpurwala 2012-07-14 12:08:37 UTC 
Mozilla developer Bobby Holley found that same-compartment security wrappers (SCSW) can be bypassed by passing them to another compartment. Cross-compartment wrappers often do not go through SCSW, but have a filtering policy built into them. When an object is wrapped cross-compartment, the SCSW is stripped off and, when the object is read read back, it is not known that SCSW was previously present, resulting in a bypassing of SCSW. This could result in untrusted content having access to the XBL that implements browser functionality.

Reference:
http://www.mozilla.org/security/announce/2012/mfsa2012-49.html

Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Mozilla developer Bobby Holley as the original reporter of this issue.
Comment 1 errata-xmlrpc 2012-07-17 18:57:51 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1089 https://rhn.redhat.com/errata/RHSA-2012-1089.html
Comment 2 errata-xmlrpc 2012-07-17 19:28:16 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1088 https://rhn.redhat.com/errata/RHSA-2012-1088.html