VUPEN Security Research - Google Chrome Clipboard Format Processing Sandbox Escape (Pwn2Own)
Website : http://www.vupen.com Twitter : http://twitter.com/vupen I. BACKGROUND --------------------- "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 --------------------- 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 --------------------------- Google Chrome versions prior to 33.0.1750.154 IV. SOLUTION ---------------- Upgrade to Chrome version version 33.0.1750.154. V. CREDIT -------------- 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 ----------------------------- 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
