A zero-day vulnerability has been disclosed within a 3rd party driver included with Windows XP/2003 installations. This vulnerability allows a non-privileged user to elevate his or her privileges to Ring0 level, leading to a fully compromised host. The first report of this vulnerability described that exploits have been seen in-the-wild.
Because of certain information included with the originally vulnerability disclosure, other researchers were able to identity the vulnerable driver and identify vulnerable code within that driver. Following the identification, it only took 24 hours before a fully-functional proof-of-concept was released. Considering that this vulnerbility has been used for active exploitation, and the new disclosure of technical exploitation details, it is expected that this vulnerability will be utilized in widespread fashion for malware and targeted attacks.
The vulnerable driver, while developed by Macrovision, is included by default in the following installations:
- Windows XP
- Windows 2003
BeyondTrust Prevention and Detection:
BeyondTrust's Blink® Personal Edition protects from this vulnerability.
BeyondTrust's Blink® Professional Edition protects from this vulnerability.
BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.
At this moment, the best form of mitigation is to disallow restricted-access users interactive logon credentials to mission-critical hosts.
Links:Original Vulnerability Disclosure
Technical Details Published
Vulnerability Demonstration Video
Microsoft Security Advisory (944653)