VUPEN Security Research - Google Chrome Clipboard Format Processing
Sandbox Escape (Pwn2Own)
Website : http://www.vupen.com
Twitter : http://twitter.com/vupen
I. BACKGROUND
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"Google Chrome is a freeware web browser developed by Google. Chrome
version 28 and beyond uses the WebKit fork Blink. As of 2013,
StatCounter estimates that Google Chrome has a 39% worldwide usage
share of web browsers" (Wikipedia).
II. DESCRIPTION
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VUPEN Vulnerability Research Team discovered a critical vulnerability
in Google Chrome.
The vulnerability is caused by an input validation error within the
"Clipboard::WriteData()" function that does not restrict the value of
the "format" parameter, which could be exploited to escape Chrome's
sandbox and achieve code execution with Medium integrity level.
III. AFFECTED PRODUCTS
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Google Chrome versions prior to 33.0.1750.154
IV. SOLUTION
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Upgrade to Chrome version version 33.0.1750.154.
V. CREDIT
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This vulnerability was discovered by VUPEN Security.
VI. ABOUT VUPEN Security
---------------------------
VUPEN is the leading provider of defensive and offensive cyber security
intelligence and advanced zero-day research. All VUPEN's vulnerability
intelligence results exclusively from its internal and in-house R&D
efforts conducted by its team of world-class researchers.
VUPEN Solutions: http://www.vupen.com/english/services/
VII. REFERENCES
----------------------
http://googlechromereleases.blogspot.com/2014/03/stable-channel-update_14.html
VIII. DISCLOSURE TIMELINE
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2013-12-19 - Vulnerability Discovered by VUPEN Security
2014-03-13 - Vulnerability Reported to Google/ZDI During Pwn2Own 2014
2014-03-14 - Vulnerability Fixed by Google
2014-03-26 - Public disclosure