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CVE Number Vulnerability Product Severity Date
MS11-081 Cumulative Security Update for Internet Explorer (2586448) Internet Explorer Critical 12-10-2011

Technical Information

Brief overview of the risk:
This security update resolves eight privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the local user.
Detailed Information on the risk:

A remote code execution vulnerability exists in the way that Internet Explorer accesses a dereferenced memory address. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the logged-on user.

K7 products  detect attempts to exploit this vulnerability (CVE-2011-1999) as Exploit (00305a851).

We have not seen instances of this exploit in the wild so far.

Further information on this exploit is available at : MS11-081

Affected Software

Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Internet Explorer 9