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Microsoft Windows Media Runtime 'wmspdmod.dll' Speech Codec Remote Code Execution Vulnerability

Risk

High

Date Discovered

October 13, 2009

Description

Microsoft Windows Media Runtime is prone to a remote code-execution vulnerability because it fails to properly bounds-check user-supplied input. 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.

Technologies Affected

  • Microsoft Audio Compression Manager
  • Microsoft DirectShow WMA Voice Codec
  • Microsoft Windows Media Audio Voice Decoder
  • Microsoft Windows Media Player 10.0
  • Microsoft Windows Media Player 11
  • Nortel Networks CallPilot 1002rp
  • Nortel Networks CallPilot 200i
  • Nortel Networks CallPilot 201i
  • Nortel Networks CallPilot 702t
  • Nortel Networks CallPilot 703t
  • 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 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

Recommendations

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.

Credits

Ivan Fratric of Zero Day Initiative and Jun Xie of McAfee Avert Labs
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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