Bug 863617 - (CVE-2012-3985) CVE-2012-3985 Mozilla: Continued access to initial origin after setting document.domain can lead to XSS attacks (MFSA 2012-76)
CVE-2012-3985 Mozilla: Continued access to initial origin after setting docum...
Status: CLOSED NOTABUG
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=20121009,repor...
: Security
Depends On:
Blocks: 852611
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Reported: 2012-10-06 00:45 EDT by Huzaifa S. Sidhpurwala
Modified: 2016-03-04 06:15 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2012-10-06 00:47:54 EDT
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Description Huzaifa S. Sidhpurwala 2012-10-06 00:45:37 EDT
Security researcher Collin Jackson reported a violation of the HTML5 specifications for document.domain behavior. Specified behavior requires pages to only have access to windows in a new document.domain but the observed violation allowed pages to retain access to windows from the page's initial origin in addition to the new document.domain. This could potentially 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.

Reference:
http://www.mozilla.org/security/announce/2012/mfsa2012-76.html

Acknowledgements:
Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Collin Jackson as the original reporter.
Comment 1 Huzaifa S. Sidhpurwala 2012-10-06 00:47:54 EDT
Statement:

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

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