BID:1515

Microsoft Windows NT/2000 NetBIOS Release Vulnerability

Info

Microsoft Windows NT/2000 NetBIOS Release Vulnerability

Bugtraq ID:	1515
Class:	Design Error
CVE:
Remote:	Yes
Local:	Yes
Published:	Jul 27 2000 12:00AM
Updated:	Jul 27 2000 12:00AM
Credit:	Discovered by Sir Dystic <[email protected]> and publicized in a Microsoft Security Bulletin (MS00-047) on July 27, 2000.
Vulnerable:	Microsoft Windows NT Workstation 4.0 SP6a Microsoft Windows NT Workstation 4.0 SP6 Microsoft Windows NT Workstation 4.0 SP5 Microsoft Windows NT Workstation 4.0 SP4 Microsoft Windows NT Workstation 4.0 SP3 Microsoft Windows NT Workstation 4.0 SP2 Microsoft Windows NT Workstation 4.0 SP1 Microsoft Windows NT Workstation 4.0 Microsoft Windows NT Terminal Server 4.0 SP6 Microsoft Windows NT Terminal Server 4.0 SP5 Microsoft Windows NT Terminal Server 4.0 SP4 Microsoft Windows NT Terminal Server 4.0 SP3 Microsoft Windows NT Terminal Server 4.0 SP2 Microsoft Windows NT Terminal Server 4.0 SP1 Microsoft Windows NT Terminal Server 4.0 alpha Microsoft Windows NT Terminal Server 4.0 Microsoft Windows NT Server 4.0 SP6a + Avaya DefinityOne Media Servers + Avaya DefinityOne Media Servers + Avaya IP600 Media Servers + Avaya IP600 Media Servers + Avaya S3400 Message Application Server 0 + Avaya S8100 Media Servers 0 + Avaya S8100 Media Servers 0 Microsoft Windows NT Server 4.0 SP6 Microsoft Windows NT Server 4.0 SP5 Microsoft Windows NT Server 4.0 SP4 Microsoft Windows NT Server 4.0 SP3 Microsoft Windows NT Server 4.0 SP2 Microsoft Windows NT Server 4.0 SP1 Microsoft Windows NT Server 4.0 Microsoft Windows NT Enterprise Server 4.0 SP6a Microsoft Windows NT Enterprise Server 4.0 SP6 Microsoft Windows NT Enterprise Server 4.0 SP5 Microsoft Windows NT Enterprise Server 4.0 SP4 Microsoft Windows NT Enterprise Server 4.0 SP3 Microsoft Windows NT Enterprise Server 4.0 SP2 Microsoft Windows NT Enterprise Server 4.0 SP1 Microsoft Windows NT Enterprise Server 4.0 Microsoft Windows 2000 Server + Avaya DefinityOne Media Servers + Avaya IP600 Media Servers + Avaya S3400 Message Application Server 0 + Avaya S8100 Media Servers 0 Microsoft Windows 2000 Professional Microsoft Windows 2000 Advanced Server

Not Vulnerable:

Discussion

Microsoft Windows NT/2000 NetBIOS Release Vulnerability

An attacker can send the NetBIOS name service in a machine a NetBIOS Release message. That forces a receiving machine to place its name in conflict so that it will no longer be able to use it. This is the correct protocol behavior. MS's fix is to have a registry key that disables the NetBIOS name service from paying attention to these messages.

Exploit / POC

Microsoft Windows NT/2000 NetBIOS Release Vulnerability

Sir Dystic <[email protected]> has provided the following exploit:

Source - nbname.cpp
Binary - nbname.exe

/data/vulnerabilities/exploits/nbname.cpp
/data/vulnerabilities/exploits/nbname.exe

Solution / Fix

Microsoft Windows NT/2000 NetBIOS Release Vulnerability

Solution:
Microsoft has released the following patch which eliminates this vulnerability:

Microsoft Windows NT Enterprise Server 4.0