VUPEN Security Research - Microsoft Internet Explorer CSS @import Memory Corruption (Pwn2Own 2014)
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"Microsoft Internet Explorer is a web browser developed by Microsoft and included as part of the Microsoft Windows line of operating systems with more than 60% of the worldwide usage share of web browsers." (Wikipedia)
VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Internet Explorer.
The vulnerability is caused by a use-after-free vulnerability when manipulating CSS @import statements through "addImport()" or "removeImport()", which could be exploited by attackers to leak arbitrary memory or execute arbitrary code via a malicious web page.
Microsoft Internet Explorer 11 Microsoft Internet Explorer 10 Microsoft Internet Explorer 9
Apply MS14-037 security update.
This vulnerability was discovered by 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.
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2014-01-24 - Vulnerability Discovered by VUPEN Security 2014-03-14 - Vulnerability Reported to ZDI / Microsoft During Pwn2Own 2014 2014-07-08 - Vulnerability Fixed by Microsoft 2014-07-16 - Public disclosure