Vulnerability Note VU#939074

Microsoft Windows XP named pipe fails to restrict anonymous access

Original Release date: 08 Feb 2005 | Last revised: 10 Feb 2005


The Server service running on Microsoft Windows XP leaks authentication information.


The Server service (srvsvc.dll) is a component of the Server Message Block (SMB), and its follow-on, Common Internet File System (CIFS). These are network protocols that Windows uses to share files, printers, serial ports, and communicate between computers. If the Server service is running on Microsoft Windows XP, a remote attacker may be able to access it anonymously via a named pipe. In addition, if that attacker supplies the service with a specially crafted message, they will receive a response that may allow them to determine what other users are accessing a shared resource.

This vulnerability affects Microsoft Windows XP SP 1, Windows XP SP 2, and Windows XP 64-Bit Edition SP 1.


A remote, unauthenticated attacker may be able to access authentication information for users running Microsoft Windows XP.


Apply Patch

Microsoft has released Microsoft Security Bulletin MS05-007 to address this issue.

Disable the Computer Browser Service

Disabling the Computer service and restarting the affected system will help protect from remote attempts to exploit this vulnerability. Please see MS05-007 for details on how to disable the Computer Browser service.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Microsoft CorporationAffected-08 Feb 2005
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This vulnerability was reported in Microsoft Security Bulletin MS05-007. Microsoft credits Jean-Baptiste Marchand with providing information regarding this issue.

This document was written by Jeff Gennari based on information provided in Microsoft Security Bulletin MS05-007.

Other Information

  • CVE IDs: CAN-2005-0051
  • Date Public: 08 Feb 2005
  • Date First Published: 08 Feb 2005
  • Date Last Updated: 10 Feb 2005
  • Severity Metric: 4.86
  • Document Revision: 57


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