TITLE:
Microsoft Windows WINS "Name" Validation Vulnerability

SECUNIA ADVISORY ID:
SA13466

VERIFY ADVISORY:
http://secunia.com/advisories/13466/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From local network

OPERATING SYSTEM:
Microsoft Windows 2000 Advanced Server
http://secunia.com/product/21/
Microsoft Windows 2000 Datacenter Server
http://secunia.com/product/1177/
Microsoft Windows 2000 Server
http://secunia.com/product/20/
Microsoft Windows NT 4.0 Server
http://secunia.com/product/18/
Microsoft Windows NT 4.0 Server, Terminal Server Edition
http://secunia.com/product/19/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/

DESCRIPTION:
Kostya Kortchinsky has reported two vulnerabilities in Microsoft
Windows, allowing malicious people to compromise a vulnerable
system.

1) The vulnerability is caused due to an unchecked buffer in the
handling of the "Name" parameter from certain packets. This can be
exploited to cause a buffer overflow and lead to execution of
arbitrary code.

2) This update also fixes a previously described vulnerability, for
more information:
SA13328

SOLUTION:
Apply patches.

Microsoft Windows NT Server 4.0 (requires Service Pack 6a):
http://www.microsoft.com/downloads/details.aspx?FamilyId=38E9DB8C-5C43-4E9A-9DC9-97C2686A45F1

Microsoft Windows NT Server 4.0 Terminal Server Edition (requires
Service Pack 6):
http://www.microsoft.com/downloads/details.aspx?FamilyId=D7AB3F6F-26FE-4AE8-A07A-481D772D03A6

Microsoft Windows 2000 Server (requires Service Pack 3 or Service
Pack 4):
http://www.microsoft.com/downloads/details.aspx?FamilyId=40146B52-5546-489E-857E-01FE1EF709B2

Microsoft Windows Server 2003:
http://www.microsoft.com/downloads/details.aspx?FamilyId=10836F38-A38B-47D5-B87B-18D8E26EEFAA

Microsoft Windows Server 2003 64-Bit Edition:
http://www.microsoft.com/downloads/details.aspx?FamilyId=06CF9E85-C66D-4A7D-B2EB-99DE9423B60F

PROVIDED AND/OR DISCOVERED BY:
Kostya Kortchinsky, CERT Renater

ORIGINAL ADVISORY:
MS04-045 (KB870763):
http://www.microsoft.com/technet/security/bulletin/ms04-045.mspx

OTHER REFERENCES:
SA13328:
http://secunia.com/advisories/13328/

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