Windows Redirected Drive Buffering System Elevation of Privilege Vulnerability

An elevation of privilege vulnerability exists in the Windows redirected drive buffering system (rdbss.sys) when the operating system improperly handles specific local calls within Windows 7 for 32-bit systems. When this vulnerability is exploited within other versions of Windows it can cause a denial of service, but not an elevation of privilege.

To exploit this vulnerability, a low-level authenticated attacker could run a specially crafted application.

The security update addresses the vulnerability by correcting how rdbss.sys handles these local calls.