June 9, 2009
Microsoft Windows RPC Marshalling Engine is prone to a remote code-execution vulnerability.
An attacker can exploit this issue by sending a specially crafted RPC request to an affected computer.
Successfully exploiting this issue will allow the attacker to execute arbitrary code with full system rights, completely compromising affected computers. Failed exploit attempts will likely result in a denial-of-service condition.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS/NIPS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from a successful exploit.
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. Host-based intrusion-prevention systems may also help prevent exploits.
Vendor advisory and updates are available. Please see the references for details.
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