VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Internet Explorer. The vulnerability is caused by a memory corruption error in the IE broker process when copying certain data, which could be exploited by remote attackers to bypass IE Protected Mode sandbox and execute arbitrary code with Medium integrity permissions…. VUPEN Vulnerability Research Team discovered a critical vulnerability in Microsoft Internet Explorer. The vulnerability is caused by a memory corruption error in the IE broker process when copying certain data, which could be exploited by remote attackers to bypass IE Protected Mode sandbox and execute arbitrary code with Medium integrity permissions.

Read more http://packetstormsecurity.com/files/123031/VUPEN-msiepmsb.txt