February 8, 2005
A remote information disclosure vulnerability affects Microsoft Windows. This issue is due to a failure of the application to securely store potentially sensitive system information. An attacker may leverage this issue to disclose the user names of all users connected to a network share, potentially facilitating further attacks against affected computers.
- Microsoft Windows XP 64-bit Edition
- Microsoft Windows XP 64-bit Edition SP1
- Microsoft Windows XP Home
- Microsoft Windows XP Home SP1
- Microsoft Windows XP Home SP2
- Microsoft Windows XP Media Center Edition
- Microsoft Windows XP Media Center Edition SP1
- Microsoft Windows XP Media Center Edition SP2
- Microsoft Windows XP Professional
- Microsoft Windows XP Professional SP1
- Microsoft Windows XP Professional SP2
- Microsoft Windows XP Tablet PC Edition
- Microsoft Windows XP Tablet PC Edition SP1
- Microsoft Windows XP Tablet PC Edition SP2
Block external access at the network boundary, unless external parties require service.
If possible, block external access to the affected computer. Permit access for trusted or internal networks and computers only. This includes blocking external access to TCP ports 139 and 445.
Disallow anonymous access to services. Permit access for trusted individuals only.
By limiting access to network shares to trusted users only, exposure to this issue can be limited.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
It is possible that some attacks resulting from this vulnerability may be detected by network intrusion detection systems (NIDS). Audit all applicable logs on a regular basis.
Microsoft has released updates to address this issue on supported platforms.
Jean-Baptiste Marchand is credited with the discovery of this issue.
© 1995- 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 firstname.lastname@example.org.
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 email@example.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.