Bug 1342900 – CVE-2016-2833 Mozilla: Java applets bypass CSP protections (MFSA 2016-60)

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Bug 1342900 - (CVE-2016-2833) CVE-2016-2833 Mozilla: Java applets bypass CSP protections (MFSA 2016-60)

Summary:	CVE-2016-2833 Mozilla: Java applets bypass CSP protections (MFSA 2016-60)

Status:	CLOSED NOTABUG

Aliases:	CVE-2016-2833

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=moderate,public=20160607,repor...
Keywords:	Security

Depends On:
Blocks:	1335788
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Reported:	2016-06-06 00:21 EDT by Huzaifa S. Sidhpurwala
Modified:	2016-06-08 23:11 EDT (History)
CC List:	2 users (show)

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Last Closed:	2016-06-08 23:11:56 EDT
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Description Huzaifa S. Sidhpurwala 2016-06-06 00:21:50 EDT

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 07:59:33 EDT

This issue is now public at:

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

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