1. /
  2. Security Response/
  3. Microsoft JScript Scripting Engine Keyword Arguments Remote Code Execution Vulnerability

Microsoft JScript Scripting Engine Keyword Arguments Remote Code Execution Vulnerability

Risk

High

Date Discovered

September 8, 2009

Description

Microsoft JScript is prone to a remote code-execution vulnerability because it fails to adequately handle user-supplied input. Attackers can leverage this issue by enticing unsuspecting users to view a malicious webpage. Successful exploits would allow arbitrary code to run with the privileges of the currently logged-in user.

Technologies Affected

  • 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 JScript 5.1
  • Microsoft JScript 5.6
  • Microsoft JScript 5.7
  • Microsoft JScript 5.8
  • Nortel Networks CallPilot 1002rp
  • Nortel Networks CallPilot 1005r
  • Nortel Networks CallPilot 201i
  • Nortel Networks CallPilot 202i
  • 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

Recommendations

Run all software as a nonprivileged user with minimal access rights.

To limit the potential damage that successful exploits may achieve, run all nonadministrative software as an unprivileged user.

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 may indicate exploit attempts or activity that results from successful exploits.

Do not follow links provided by unknown or untrusted sources.

Attackers can exploit this vulnerability by enticing a user to visit a malicious website. Do not follow links provided by sources of questionable integrity. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Set web browser security to disable the execution of JavaScript.

Since exploiting this issue allows malicious script code to run 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.

Do not open email messages from unknown or untrusted individuals.

Attackers could exploit this vulnerability through HTML email messages. Do not accept any email from sources of questionable integrity.
The vendor has released a security advisory and fixes. Please see the references for details.

Credits

Wushi of team509 working with Zero Day Initiative
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.

Threat Intelligence

Subscribe
Follow the Threat Intelligence Twitter feed
STAR Antimalware Protection Technologies
Internet Security Threat Report, Volume 17
Symantec DeepSight Screensaver