Exploit:Win32/MS08067.gen!A is a generic detection for code that attempts to exploit a vulnerability in SVCHOST.EXE. If the vulnerability is successfully exploited, it could allow remote code execution when file sharing is enabled.
On targeted hosts running Windows 2003, XP, 2000 or NT, this remote attack may be performed by an unauthenticated user. Successful exploitation of the vulnerability on systems with default installations of Windows Vista and Windows Server 2008 require authentication due to protections introduced as part of user access control (UAC) that enforce additional levels of integrity.