Bug 1039420 (CVE-2013-5612)

Summary: CVE-2013-5612 Mozilla: Character encoding cross-origin XSS attack (MFSA 2013-106)
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: jhorak, jkurik, security-response-team, stransky
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: 2013-12-12 04:15:39 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 1030244    

Description Huzaifa S. Sidhpurwala 2013-12-09 04:15:02 UTC 
Security researcher Masato Kinugawa discovered that if a web page is missing character set encoding information it can inherit character encodings across navigations into another domain from an earlier site. Only same-origin inheritance is allowed according to the HTML5 specification. This issue allows an attacker to add content that will be interpreted one way on the victim site, but which may then behave differently, evading cross-site scripting (XSS) filtering, when forced into an unexpected character set. Web site authors should always explicitly declare a character encoding to avoid similar issues.

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.



External Reference:

http://www.mozilla.org/security/announce/2013/mfsa2013-106.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Masato Kinugawa as the original reporter.
Comment 1 errata-xmlrpc 2013-12-11 05:28:02 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5

Via RHSA-2013:1812 https://rhn.redhat.com/errata/RHSA-2013-1812.html
Comment 2 errata-xmlrpc 2013-12-11 17:27:34 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 5

Via RHSA-2013:1823 https://rhn.redhat.com/errata/RHSA-2013-1823.html