Windows CSRSS Security Feature Bypass Vulnerability

A security feature bypass vulnerability exists in Microsoft Windows when the Client-Server Run-time Subsystem (CSRSS) fails to properly manage process tokens in memory. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows manages process tokens in memory.