Vulnerability Note VU#311619

Overview

Microsoft Server Message Block (SMB) may crash upon receipt of a crafted SMB_COM_TRANSACTION packet requesting a NetServerEnum3 transaction. Attackers can use this vulnerability to cause a denial of service.

Description

SMB is a protocol for sharing data and resources between computers, included in many versions of Microsoft Windows. SMB may crash if it receives a crafted SMB_COM_TRANSACTION packet requesting a NetServerEnum2 transaction. If either the 'Max Param Count' field or 'Max Data Count' field of the packet is set to zero (0), the destination SMB host will crash with a blue screen. This vulnerability can be exploited by both local and remote attackers.

Impact

Remote attackers can cause a denial of service. Attackers may also be able to execute arbitrary code, though this has not been demonstrated or proven.

Solution

Apply a patch For more information, see: http://www.microsoft.com/technet/treeview/?url=/technet/security/bulletin/MS02-045.asp

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Microsoft Corporation	Affected	15 Jul 2002	23 Aug 2002

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

References

• http://www.microsoft.com/technet/treeview/?url=/technet/security/bulletin/MS02-045.asp

Credit

Thanks to Ivan Arce of CORE Security Technologies for reporting this vulnerability.

This document was written by Shawn Van Ittersum.

Other Information

• CVE IDs: Unknown
• Date Public: 22 Aug 2002
• Date First Published: 23 Aug 2002
• Date Last Updated: 26 Aug 2002
• Severity Metric: 0.87
• Document Revision: 9