Public exploits available
On this page
Windows Media Encoder 9 Series installs an ActiveX control named wmex.dll. The control was marked as Safe for Scripting (SFS). However, this control was never intended to be instantiated in Internet Explorer. An attacker could host a specially crafted Web site that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the Web site. This can also include compromised Web sites and Web sites that accept or host user-provided content or advertisements. These Web sites could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites.
An attacker who successfully exploited this vulnerability could run arbitrary code on a user’s system. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system.
Technical details (analysis)
A remote code execution vulnerability exists in the WMEX.DLL ActiveX control installed by Windows Media Encoder 9 Series.
Microsoft Windows 2000 Service Pack 4
Microsoft Windows XP Service Pack 2 and Windows XP Service Pack 3
Microsoft Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2
Microsoft Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
Microsoft Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2
Microsoft Windows Vista and Windows Vista Service Pack 1
Microsoft Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1
Microsoft Windows Server 2008 for 32-bit Systems
Microsoft Windows Server 2008 for x64-based Systems
Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems
Windows Server 2008 for Itanium-based Systems
Release Date: 2009-08-06T00:00:00
Known false positives
No known false positives at this time.
Prevent WMEX.DLL from running in Internet Explorer