Microsoft Security Advisory for Internet Explorer Exploit

Systems Affected

* Microsoft Internet Explorer 7

* Microsoft Internet Explorer 8

* Microsoft Internet Explorer 9

Overview

An unpatched use-after-free vulnerability in Microsoft Internet Explorer versions 7, 8, and 9 is being exploited in the wild.

Microsoft has released Security Advisory 2757760 with mitigation techniques.

Description

Microsoft Internet Explorer versions 7, 8, and 9 are susceptible to a use-after-free vulnerability. This vulnerability is being actively exploited in the wild. At this time, there is no patch available for this vulnerability. End-users can mitigate the vulnerability by using Microsoft's Enhanced Mitigation Experience Toolkit.

Additional mitigation advice is available in the MSRC blog post:

"Microsoft Releases Security Advisory 2757760" and US-CERT Vulnerability Note VU#480095.

Impact

A remote, unauthenticated attacker could execute arbitrary code, cause a denial of service, or gain unauthorized access to your files or system.

Solution

US-CERT recommends Internet Explorer users read Microsoft Security Advisory 2757760 and apply mitigation techniques such as using the Microsoft Enhanced Mitigation Experience Toolkit.

References

* Microsoft Security Advisory (2757760)

<http://technet.microsoft.com/en-us/security/advisory/2757760>

* MSRC Blog: Microsoft Releases Security Advisory 2757760

<http://blogs.technet.com/b/msrc/archive/2012/09/17/microsoft-releases-security-advisory-2757760.aspx>

* Download Microsoft EMET 3.0

<http://www.microsoft.com/en-us/download/details.aspx?id=29851>

* US-CERT Vulnerability Note VU#480095

<http://www.kb.cert.org/vuls/id/480095>