September 8, 2009
Microsoft Windows is prone to a remote memory-corruption vulnerability that arises when an affected Windows component handles a malicious ASF file. Successful exploits may allow attackers to execute arbitrary code with the privileges of the currently logged-in user. Failed attacks will cause denial-of-service conditions.
- Microsoft Windows Media Format 11
- Microsoft Windows Media Format 9.0
- Microsoft Windows Media Format 9.5
- Microsoft Windows Media Format 9.5 x64
- Microsoft Windows Media Services 2008
- Microsoft Windows Media Services 9.1
- Nortel Networks CallPilot 1002rp
- Nortel Networks CallPilot 1005r
- Nortel Networks CallPilot 201i
- Nortel Networks CallPilot 202i
- Nortel Networks CallPilot 600r
- Nortel Networks CallPilot 703t
- Nortel Networks Contact Center - Symposium Agent
- Nortel Networks Contact Center - TAPI Server
- Nortel Networks Contact Center Administration
- Nortel Networks Contact Center Express
- Nortel Networks Contact Center Manager Server
- Nortel Networks Contact Center NCC
- 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 Peri Application
- Nortel Networks Self-Service Peri Workstation
- Nortel Networks Self-Service Speech Server
- Nortel Networks Self-Service VoiceXML
- Nortel Networks Self-Service WVADS
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
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.
Do not accept or execute files from untrusted or unknown sources.
To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.
Do not follow links provided by unknown or untrusted sources.
To reduce the likelihood of successful exploits, never visit sites of questionable integrity or follow links provided by unfamiliar or untrusted sources.
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.
Peter Winter-Smith of NGS Software
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