Bug 1342900 (CVE-2016-2833)

Summary:	CVE-2016-2833 Mozilla: Java applets bypass CSP protections (MFSA 2016-60)
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anemec, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2016-06-09 03:11:56 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1335788

Description Huzaifa S. Sidhpurwala 2016-06-06 04:21:50 UTC

Mozilla engineer Matt Wobensmith reported that Content Security Policy (CSP) does not block the loading of cross-domain Java applets when specified by policy. This is because the Java applet is loaded by the Java plugin, which then mediates all network requests without checking against CSP. This could allow a malicious site to manipulate content through a Java applet to bypass CSP protections, allowing for possible cross-site scripting (XSS) attacks. 


External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-60.html


Acknowledgements:

Name: the Mozilla project
Upstream: Matt Wobensmith

Statement:

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

Comment 1 Andrej Nemec 2016-06-08 11:59:33 UTC

This issue is now public at:

https://www.mozilla.org/en-US/security/advisories/mfsa2016-60/