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>> Microsoft Windows Workstation Service "NetrWkstaUserEnum()" Denial of Service Issue

Title : Microsoft Windows Workstation Service "NetrWkstaUserEnum()" Denial of Service Issue
VUPEN ID : VUPEN/ADV-2006-5142
CVE ID : CVE-2006-6723
Rated as : Moderate Risk 
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-12-26


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format  Receive VUPEN Security notifications by SMS 

A vulnerability has been identified in Microsoft Windows, which could be exploited by attackers to cause a denial of service. This issue is due to an error in the Workstation Service that does not properly handle specially crafted "NetrWkstaUserEnum()" requests, which could be exploited by attackers to cause a vulnerable service to crash or exhaust all available memory resources, creating a denial of service condition.

Affected Products

Microsoft Windows 2000 Service Pack 4
Microsoft Windows XP Service Pack 1
Microsoft Windows XP Service Pack 2
Microsoft Windows XP Professional x64 Edition

Solution

Block ports 139 and 445 at the firewall.

VUPEN Security is not aware of any vendor-supplied patch.

References

http://www.vupen.com/english/advisories/2006/5142

Credits

Vulnerability reported by h07

ChangeLog

2006-12-26 : Initial release

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