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  3. Microsoft Outlook Express Content Disposition Parsing Information Disclosure Vulnerability

Microsoft Outlook Express Content Disposition Parsing Information Disclosure Vulnerability

Risk

Medium

Date Discovered

June 12, 2007

Description

Outlook Express is prone to a cross-domain information-disclosure vulnerability. This vulnerability may let a malicious website access properties of a site in an arbitrary external domain in the context of the victim's browser. Attackers could exploit this issue to access sensitive information (such as cookies or passwords) that is associated with the external domain.

Technologies Affected

  • Microsoft Outlook Express 6.0
  • Microsoft Outlook Express 6.0 SP1
  • Microsoft Outlook Express 6.0 SP2
  • Microsoft Windows Mail

Recommendations

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

Ensure that all nonadministrative tasks, such as browsing the web and reading email, are performed as an unprivileged user with minimal access rights.

Do not follow links provided by unknown or untrusted sources.

Users should never visit sites of questionable integrity or follow links provided by unfamiliar or untrusted sources.

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

To limit exposure to this and other vulnerabilities, disable scripting and active content in the Internet Zone.

Disable any services that are not needed.

To limit email-based attack vectors for this and other vulnerabilities, disable support for HTML email in the email client.
The vendor has released an advisory to address this issue in supported applications. Please see the referenced advisory for details on obtaining the appropriate updates.

Credits

Yosuke Hasegawa of WASC is credited with the discovery of this vulnerability.
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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