April 14, 2009
Microsoft DirectX is prone to a remote code-execution vulnerability because the DirectShow component fails to properly handle compressed media files. Successfully exploiting this issue allows remote attackers to execute arbitrary code in the context of the user running the application that uses DirectX. Failed exploit attempts will result in a denial-of-service condition.
- 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 DirectX 8.1
- Microsoft DirectX 9.0
- Microsoft DirectX 9.0 a
- Microsoft DirectX 9.0 c
- Microsoft DirectX 9.0b
- Nortel Networks CallPilot 1002rp
- Nortel Networks CallPilot 1005r
- Nortel Networks CallPilot 201i
- Nortel Networks CallPilot 600r
- Nortel Networks CallPilot 703t
- Nortel Networks Contact Center - Symposium Agent
- Nortel Networks Contact Center - TAPI Server
- Nortel Networks Contact Center
- Nortel Networks Contact Center Administration
- Nortel Networks Contact Center Express
- Nortel Networks Contact Center Manager Server
- Nortel Networks Contact Center NCC
- 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 Peri Application
- Nortel Networks Peri Workstation
- 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
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 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.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
The vendor has released an advisory along with fixes. Please see the references for details.
Piotr Bania of Kryptos Logic
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