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Vulnerability in the Microsoft Client Service for Netware (MS05-046)

Attack ID: CPAI-2005-138
Publish Date:
Last Update:
Category: Remote Code Execution
Vulnerable Systems: Windows 2000
Windows 2003
Windows NT4
Windows XP
Windows XP SP2
Source: Microsoft Security Bulletin MS05-046
Description:

Microsoft's Client Service for Netware provides connectivity infrastructure for Novel Netware systems. A buffer overflow vulnerability was detected in several Microsoft Windows operating systems that have Client Service for NetWare installed.

Severity:
Details: The vulnerability is due to a buffer overflow error in the Microsoft Client for Netware Service that does not properly handle specially crafted requests.
Attack Detection:

Users of VPN-1 NG with Application Intelligence R55W, users of VPN-1 NGX R60 and users of InterSpect will identify the attack by the following log entries:

Attack Name: MS-RPC over CIFS violation
Attack Information: MS-RPC over CIFS - Detected Microsoft Client Service for NetWare Vulnerability (MS05-046)

Users of VPN-1 NG with Application Intelligence R55 will identify rule 99450 on the SmartView Tracker screen.  

Solution:

Users of VPN-1 NG with Application Intelligence R55 and R55W, users of VPN-1 NGX R60 and users of InterSpect should update their SmartDefense by clicking Online Update (R55 - Update Now) in the SmartDashboard General window.

The Update protects against this vulnerability by blocking malformed Microsoft Client Service for NetWare messages.

To enable the protection:

1. On the SmartDefense tree, click MS-RPC > MS-RPC over CIFS.
2. Enable Block Client Service for NetWare Vulnerability (MS05-046)


3. Install security policy on all modules.
 

Industry Reference: CAN-2005-1985
Additional Information:

This update also includes:

Microsoft DTC protection (MS05-051) - CPAI-2005-140 
Microsoft uPnP protection (MS05-047) - CPAI-2005-139  
Microsoft Windows LSASS Protection - CPAI-2005-136