The Microsoft Office Snapshot Viewer ActiveX control contains a race condition, which can allow a remote, unauthenticated attacker to download arbitrary files to arbitrary locations.
Microsoft Snapshot Viewer is a viewer for snapshots created with Microsoft Access. Snapshot Viewer is available as an ActiveX control, which is provided by snapview.ocx, or as a stand-alone application. Snapshot Viewer is provided with Office 2000, Office XP, and Office 2003, and it may also be installed on a system that does not have Microsoft Office. By design, the Snapshot Viewer ActiveX control can download a specified file to a temporary location, giving it a temporary name. However, a race condition in the control can allow an attacker to download files to arbitrary locations with arbitrary file names.
We have received reports of active exploitation of this vulnerability. Exploit code for this vulnerability is publicly available.
By convincing a victim to view an HTML document (web page, HTML email, or email attachment), an attacker could download arbitrary files to a vulnerable system within the security context of the user running IE. These files could contain code that could be executed through other means. The user may click the file inadvertently, or the file may be placed in a sensitive location, such as the Windows Startup folder where it will automatically execute the next time the user logs onto the system.
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This document was written by Will Dormann.
|Date First Published:||2008-07-07|
|Date Last Updated:||2008-08-12 18:09 UTC|