Bug 877628 - (CVE-2012-5841) CVE-2012-5841 Mozilla: Improper security filtering for cross-origin wrappers (MFSA 2012-100)
CVE-2012-5841 Mozilla: Improper security filtering for cross-origin wrappers ...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20121120,repor...
: Security
Depends On:
Blocks: 873088
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Reported: 2012-11-17 06:38 EST by Huzaifa S. Sidhpurwala
Modified: 2013-01-16 12:05 EST (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-01-16 12:05:28 EST
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Description Huzaifa S. Sidhpurwala 2012-11-17 06:38:30 EST
Mozilla developer Bobby Holley reported that security wrappers filter at the time of property access, but once a function is returned, the caller can use this function without further security checks. This affects cross-origin wrappers, allowing for write actions on objects when only read actions should be properly allowed. This can lead to cross-site scripting (XSS) attacks.

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/mfsa2012-100.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Bobby Holley as the original reporter.
Comment 1 errata-xmlrpc 2012-11-20 16:51:44 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5

Via RHSA-2012:1483 https://rhn.redhat.com/errata/RHSA-2012-1483.html
Comment 2 errata-xmlrpc 2012-11-20 17:12:18 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:1482 https://rhn.redhat.com/errata/RHSA-2012-1482.html

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