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VULNERABILITY - July 29, 2006

by Marianna Schmudlach / July 29, 2006 4:44 AM PDT

Microsoft Windows Server Message Block Protocol Remote Denial of Service Vulnerability

Advisory ID : FrSIRT/ADV-2006-3037
CVE ID : GENERIC-MAP-NOMATCH
Rated as : Moderate Risk
Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-07-28

Technical Description

A vulnerability has been identified in Microsoft Windows, which could be exploited by remote attackers to cause a denial of service. This flaw is due to NULL pointer dereference error in the server driver (srv.sys) when handling specially crafted SMB (Server Message Block) packets, which could be exploited by remote unauthenticated attackers to cause a vulnerable system to crash and display a blue screen, creating a denial of service condition.

Note : A fully functional exploit has been published.

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
Microsoft Windows Server 2003
Microsoft Windows Server 2003 Service Pack 1
Microsoft Windows Server 2003 (Itanium)
Microsoft Windows Server 2003 SP1 (Itanium)
Microsoft Windows Server 2003 x64 Edition

Solution

Restrict access to ports 135, 139, and 445.

The FrSIRT is not aware of any official supplied patch for this issue.

http://www.frsirt.com/english/advisories/2006/3037

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