(Pwn2Own) Microsoft Internet Explorer CSS Memory Corruption Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the handling of CSS stylesheets. The issue lies in the failure to properly clone the properties within a stylesheet that is referenced multiple times. An attacker can leverage this vulnerability to execute code under the context of the current process.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/en-us/library/security/ms14-037.aspx
Disclosure Timeline
- 2014-03-11 - Vulnerability reported to vendor
- 2014-07-09 - Coordinated public release of advisory
Credit
VUPEN
