Vulnerability Note VU#146896

Gear Software CD DVD Filter driver privilege escalation vulnerability

Original Release date: 07 Oct 2008 | Last revised: 07 Oct 2008


The Gear Software CD DVD Filter driver contains a privilege escalation vulnerability, which can allow an attacker to gain SYSTEM privileges.


Gear Software provides a driver called CD DVD Filter, which is provided by GEARAspiWDM.sys. This driver is used by multiple CD/DVD recording applications. The Gear Software CD DVD Filter driver allows unlimited calls to IoAttachDevice from a user-space application. By making multiple calls to IoAttachDevice, an attacker may be able to exploit an integer overflow in the Microsoft Windows kernel to execute code with SYSTEM privileges.


An attacker may be able to execute code with SYSTEM privileges.


Apply an update

This issue is addressed in GEAR driver version 4.001.7, which provides GEARAspiWDM.sys version This version of the CD DVD Filter driver limits the number of IoAttachDevice calls that can be made. Please check with your software vendor for updates that contains this fixed driver. If no update is available, the stand-alone driver from GEAR may be installed.

Apple iTunes users should install iTunes 8.0, as specified in the About the security content of iTunes 8.0 document.

Symantec customers using Norton 360, Norton Ghost, Norton Save and Restore, Backup Exec System Recovery, and Symantec LiveState Recovery should apply an update, as specified in the Symantec Security Advisory SYM08-017.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Apple Computer, Inc.Affected13 Mar 200807 Oct 2008
GEAR Software, Inc. Affected13 Mar 200807 Oct 2008
Symantec, Inc.Affected13 Mar 200807 Oct 2008
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



Thanks to Ruben Santamarta of Wintercore for reporting this vulnerability by way of the Microsoft Security Response Center.

This document was written by Will Dormann.

Other Information

  • CVE IDs: CVE-2008-3636
  • Date Public: 07 Oct 2008
  • Date First Published: 07 Oct 2008
  • Date Last Updated: 07 Oct 2008
  • Severity Metric: 5.67
  • Document Revision: 13


If you have feedback, comments, or additional information about this vulnerability, please send us email.