Date Discovered April 12, 2011
Description Microsoft Windows is prone to a remote code-execution vulnerability that affects the Microsoft Server Message Block (SMB) protocol software.
A remote attacker can exploit this issue to execute code with SYSTEM-level privileges. Failed exploit attempts will likely cause denial-of-service conditions.
Block external access at the network boundary, unless external parties require service. If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to
only trusted computers and networks might greatly reduce the likelihood of exploitation.
Deploy network intrusion detection systems to monitor network traffic for malicious activity. Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include explained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
The vendor released an advisory and updates. Please see the references for details.
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