Microsoft Windows XP named pipe fails to restrict anonymous access

Overview

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

Description

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.

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Impact

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

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Solution

Apply Patch

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

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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.

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Vendor Information

939074

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Updated: February 08, 2005

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see Microsoft Security Bulletin MS05-007.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23939074 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.microsoft.com/technet/security/Bulletin/MS05-007.mspx&gt;
• <http://support.microsoft.com/?kbid=188001&gt;

Acknowledgements

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:	CVE-2005-0051
Severity Metric:	4.86 Date Public: