This update resolves three reported vulnerabilities in Server Message Block Version 2 (SMBv2) -- one publicly disclosed and two in private. Successful exploitation of the said vulnerabilities could lead to different results, including remote code execution.
This update correctly validates the fields inside SMBv2 packets, which corrects the way SMB handles the command value in SMB packets and the way SMB parses specially crafted SMB packets.
Installing standard firewall protection is advised to help protect networks from attacks.
Trend Micro Deep Security shields the following vulnerabilities using the specified rules. Trend Micro customers using OfficeScan with the Intrusion Defense Firewall plugin are also protected from attacks using these vulnerabilities.
|Microsoft Bulletin ID||Vulnerability ID||Rule Number & Title||Deep Security Pattern Version||Deep Security Pattern Release Date|
|MS09-050||CVE-2009-2526||1003761 - SMBv2 Infinite Loop Vulnerability||09-030||Oct 14, 2009|
|MS09-050||CVE-2009-2532||1003712 - Windows Vista SMB 2.0 Negotiate Protocol Request Remote||09-027||Sep 9, 2009|
|MS09-050||CVE-2009-3103||1003712 - Windows Vista SMB 2.0 Negotiate Protocol Request Remote||09-027||Sep 9, 2009|