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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Windows XP Named Pipe Validation Error Lets Remote Users Obtain Information
SecurityTracker Alert ID:  1013112
SecurityTracker URL:  http://securitytracker.com/id/1013112
CVE Reference:   CVE-2005-0051   (Links to External Site)
Date:  Feb 8 2005
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): XP SP1 and SP2
Description:   A vulnerability was reported in Microsoft Windows XP in the processing of named pipes. A remote user can determine certain usernames on the target system.

The vendor reported that the software does not properly validate authentication information when a remote user establishes an anonymous logon by using a named pipe connection. A remote user can send specially crafted requests to determine the usernames for user accounts that have an open connection to a share resource.

The vendor credits Jean-Baptiste Marchand of Herve Schauer Consultants with reporting this flaw.

Impact:   A remote user can determine the user names for users that have an open connection to an available shared resource.
Solution:   The vendor has issued the following fixes:

Microsoft Windows XP Service Pack 1 and Microsoft Windows XP Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?FamilyId=B8C867C2-B7CD-4E2F-90E0-169B2C7125DC

Microsoft Windows XP 64-Bit Edition Service Pack 1 (Itanium):

http://www.microsoft.com/downloads/details.aspx?FamilyId=2F68945E-EEB8-42BC-A8AD-0D3991204889

A restart is not required.

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms05-007.mspx (Links to External Site)
Cause:   Access control error

Message History:   None.


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