June 9, 2009
Microsoft Active Directory is prone to a remote code-execution vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the application. Successful exploits will completely compromise the affected computer. Failed attacks will cause denial-of-service conditions.
- Avaya Messaging Application Server
- Avaya Messaging Application Server MM 1.1
- Avaya Messaging Application Server MM 2.0
- Avaya Messaging Application Server MM 3.0
- Avaya Messaging Application Server MM 3.1
- Microsoft Windows 2000 Advanced Server SP4
- Microsoft Windows 2000 Datacenter Server SP4
- Microsoft Windows 2000 Server SP4
- Nortel Networks Self-Service - CCSS7
- Nortel Networks Self-Service CCXML
- Nortel Networks Self-Service MPS 100
- Nortel Networks Self-Service MPS 1000
- Nortel Networks Self-Service MPS 500
- Nortel Networks Self-Service Media Processing Server
- Nortel Networks Self-Service Peri Application
- Nortel Networks Self-Service Peri Workstation
- Nortel Networks Self-Service Speech Server
- Nortel Networks Self-Service VoiceXML
- Nortel Networks Self-Service WVADS
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 successful exploits.
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 NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Implement multiple redundant layers of security.
Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.
The vendor has released an advisory and updates. Please see the references for details.
Joshua J. Drake of VeriSign iDefense Labs
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