September 9, 2008
The Microsoft Windows Media Encoder 9 ActiveX control is prone to a buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied input.
An attacker can exploit this issue to execute arbitrary code in the context of an application using the affected ActiveX control (typically Internet Explorer). Failed attacks will likely cause denial-of-service conditions.
- HP Storage Management Appliance 2.1
- HP Storage Management Appliance I
- HP Storage Management Appliance II
- HP Storage Management Appliance III
- Microsoft Windows Media Encoder 9
- Microsoft Windows Media Encoder 9 x64
- Nortel Networks Media Processing Svr 100
- Nortel Networks Media Processing Svr 1000 Rel 3.0
- Nortel Networks Media Processing Svr 500 Rel 3.0
- Nortel Networks Multimedia Comm MCS5100
- Nortel Networks Self Service VoiceXML
- Nortel Networks Self-Service - CCSS7
- Nortel Networks Self-Service CCXML
- Nortel Networks Self-Service Peri Application
- Nortel Networks Self-Service Peri Workstation
- Nortel Networks Self-Service Speech Server
- Nortel Networks Self-Service WVADS
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.
Run all software as a nonprivileged user with minimal access rights.
To limit the potential damage that a successful exploit may achieve, run all nonadministrative software as a regular user with the least amount of privileges required to successfully operate.
Do not follow links provided by unknown or untrusted sources.
Do not follow links, visit websites, or open files that are provided by untrusted sources.
Set web browser security to disable the execution of script code or active content.
Since exploiting this issue may require that malicious script code be executed in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect websites that rely on the execution of browser-based script code.
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 to address this issue. Please see the references for more information.
Nguyen Minh Duc and Le Manh Tung with Bach Khoa Internetwork Security Center (BKIS) Hanoi University of Technology (Vietnam)
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