Technical Information

Brief overview of the risk:
This security update resolves three privately reported vulnerabilities in Windows Print Spooler. The most severe vulnerability could allow remote code execution if an affected server received a specially crafted RPC request. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed.
Detailed Information on the risk:
A remote code execution vulnerability exists in the Windows Print Spooler that could allow a remote, unauthenticated attacker to execute arbitrary code on an affected system. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts. Further information on this exploit is available at : MS09-022