October 13, 2009
Microsoft Windows Media Runtime is prone to a remote memory-corruption vulnerability. An attacker can exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition.
- Microsoft Audio Compression Manager
- Microsoft DirectShow WMA Voice Codec
- Microsoft Windows Media Audio Voice Decoder
- Nortel Networks CallPilot 201i
- Nortel Networks CallPilot 202i
- Nortel Networks CallPilot 702t
- Nortel Networks CallPilot 703t
- Nortel Networks Contact Center - TAPI Server
- Nortel Networks Contact Center Express
- Nortel Networks Contact Center Manager
- Nortel Networks Contact Center Multimedia
- 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
- Nortel Networks Symposium Express Contact Center 4.2
Run all software as a nonprivileged user with minimal access rights.
To lessen the potential damage that successful exploits may achieve, run all software as a nonadministrative user with the least amount of privileges required to successfully operate.
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 a successful exploit.
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.
Do not following links, visit websites, or open files that are provided by untrusted sources.
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.
Microsoft has released an advisory along with fixes. Please see the references for details.
Vinay Anantharaman of Adobe Systems, Inc.
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