Description: This security update resolves several privately reported vulnerabilities in Microsoft Server Message Block (SMB) Protocol. The vulnerabilities could allow remote code execution on affected systems. An attacker who successfully exploited these vulnerabilities could install programs; view, change, or delete data; or create new accounts with full user rights. 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. The security update addresses the vulnerabilities by validating the fields inside the SMB packets.
Update type: Moderate
Release date: January 13, 2008
Applies to: All
Knowledge base: http://support.microsoft.com/kb/958687
Comments: Here are the specifics on the vulnerabilities covered by this update: