Technical Information

Brief overview of the risk:
The vulnerability could allow elevation of privilege if an attacker runs a specially crafted application on an affected system. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerability.

Detailed Information on the risk:

An elevation of privilege vulnerability exists in the WebDAV kernel-mode driver (mrxdav.sys) when it fails to properly validate and enforce impersonation levels. An attacker who successfully exploited this vulnerability could bypass impersonation-level security and gain elevated privileges on a targeted system, which could allow them to intercept WebDAV requests for files from any server (including corporate SharePoint sites) and redirect those file requests to return any, potentially malicious, files of the attackerÆs choosing.

Further information on this exploit is available at : MS15-008

Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows 8 for 32-bit Systems
Windows 8 for x64-based Systems
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
Windows Server 2012