Bug 1342894 (CVE-2016-2825)

Summary: CVE-2016-2825 Mozilla: Partial same-origin-policy through setting location.host through data: URI (MFSA 2016-54)
Product: [Other] Security Response Reporter: Huzaifa S. Sidhpurwala <huzaifas>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: security-response-team
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2016-06-09 03:10:54 UTC Type: ---
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Bug Blocks: 1335788    

Description Huzaifa S. Sidhpurwala 2016-06-06 04:12:09 UTC 
Security researcher Armin Razmdjou reported that the location.host property can be set to an arbitrary string after creating an invalid data: URI. This allows for a bypass of some same-origin policy protections. This issue is mitigated by the data: URI in use and any same-origin checks for http: or https: are still enforced correctly. As a result cookie stealing and other common same-origin bypass attacks are not possible. 


External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-54.html


Acknowledgements:

Name: the Mozilla project
Upstream:  Armin Razmdjou

Statement:

This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.