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Category:   Application (Generic)  >   Microsoft Client Service for NetWare (CSNW) Vendors:   Microsoft
Microsoft Client Service for Netware Buffer Overflows Let Remote Users Execute Arbitrary Code and Crash the System
SecurityTracker Alert ID:  1017224
SecurityTracker URL:  http://securitytracker.com/id/1017224
CVE Reference:   CVE-2006-4688, CVE-2006-4689   (Links to External Site)
Date:  Nov 14 2006
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Microsoft Client Service for Netware. A remote user can execute arbitrary code on the target system. A remote user can cause denial of service conditions on the target system.

A remote user can send specially crafted data to trigger a buffer overflow and execute arbitrary code on the target system [CVE-2006-4688]. The code will run with the privileges of the target service.

A remote user can also send specially crafted data to trigger a flaw in the driver and cause the target system to stop responding [CVE-2006-4689]. On Windows Server 2003, only a remote authenticated user can exploit this denial of service vulnerability.

This product is also known as the Gateway Service for NetWare on Windows 2000 Servers.

Microsoft credits Peter Winter-Smith of NGS Software and Sam Arun Raj of McAfee with reporting the code execution vulnerability and Sam Arun Raj with reporting the denial of service vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.

A remote user can cause the target system to stop responding.

Solution:   The vendor has issued the following fixes:

Microsoft Windows 2000 Service Pack 4:

http://www.microsoft.com/downloads/details.aspx?FamilyId=3cf0b0d1-ff07-40ac-a6ac-44dc4a54f91e

Microsoft Windows XP Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?FamilyId=2f54258f-1071-467b-80a2-e4dbfc050667

Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?FamilyId=W2K3

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms06-066.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms06-066.mspx (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (2000), Windows (2003), Windows (XP)

Message History:   None.


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