Norton.com > Viruses & Risks > Microsoft XML Core Services Transfer Encoding Cross Domain Information Disclosure Vulnerability

Microsoft XML Core Services Transfer Encoding Cross Domain Information Disclosure Vulnerability

Risk

Medium

Date Discovered

November 11, 2008

Description

Microsoft XML Core Services (MSXML) is prone to a cross-domain information-disclosure vulnerability because the application fails to properly enforce the same-origin policy. An attacker can exploit this issue to harvest potentially sensitive information from a web page in another domain. Information obtained may aid in further attacks.

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
  • HP Storage Management Appliance 2.1
  • IBM Rational AppScan Enterprise 5.2
  • IBM Rational AppScan Enterprise 5.5 Fix Pack 1
  • IBM Rational AppScan Enterprise 5.5.0.2
  • IBM Rational AppScan Enterprise 5.6
  • IBM Rational AppScan Enterprise 8.0.0
  • IBM Rational AppScan Enterprise 8.0.0.1
  • IBM Rational AppScan Enterprise 8.0.1
  • IBM Rational AppScan Enterprise 8.0.1.1
  • IBM Rational AppScan Enterprise 8.5
  • IBM Rational AppScan Enterprise 8.5.0.1
  • IBM Rational AppScan Enterprise 8.6
  • IBM Rational AppScan Enterprise 8.6.0.0
  • IBM Rational AppScan Enterprise 8.6.0.1
  • IBM Rational AppScan Enterprise 8.6.0.2
  • IBM Rational Policy Tester 5.6
  • IBM Rational Policy Tester 8.0
  • IBM Rational Policy Tester 8.5
  • IBM Rational Policy Tester 8.5.0.1
  • IBM Rational Policy Tester 8.5.0.2
  • IBM Rational Policy Tester 8.5.0.4
  • Microsoft Windows 7 for 32-bit Systems
  • Microsoft Windows 7 for x64-based Systems
  • Microsoft Windows Server 2008 for Itanium-based Systems R2
  • Microsoft Windows Server 2008 for x64-based Systems R2
  • Microsoft XML Core Services 3.0
  • Microsoft XML Core Services 4.0
  • Microsoft XML Core Services 5.0
  • Microsoft XML Core Services 6.0
  • Nortel Networks CallPilot 1005R
  • Nortel Networks CallPilot 201I
  • Nortel Networks CallPilot 600R
  • Nortel Networks CallPilot 703T
  • Nortel Networks Contact Center - TAPI Server
  • Nortel Networks Contact Center Express
  • Nortel Networks Contact Center Manager
  • Nortel Networks Contact Center Manager Server
  • Nortel Networks Contact Center NCC
  • Nortel Networks Self Service VoiceXML
  • 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 WVADS
  • Nortel Networks Symposium Agent

Recommendations

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

When possible, run all software as a user with minimal privileges and limited access to system resources. Use additional precautions such as restrictive environments to insulate software that may potentially handle malicious content.

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.

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.

Set web browser security to disable the execution of script code or active content.

Since a successful exploit of this issue requires malicious code to execute in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.
Microsoft has released an advisory along with fixes to address this issue. Please see the references for more information.

Credits

Stefano Di Paola of Minded Security

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