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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2006-0114
Multiple Vulnerabilities in Client Service for NetWare

Original Issue Date:November 15, 2006

Severity Rating: LOW

Systems Affected

  • Microsoft Windows 2000 Service Pack 4
  • Microsoft Windows XP Service Pack 2
  • Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1

    • Overview

    Multiple vulnerabilities exist in Client Service for NetWare CSNW that could allow an attacker who successfully exploited one of these vulnerabilities to take complete control of the affected system.

    Description

    1. Memory Corruption Vulnerability in Client Service for NetWare ( CVE-2006-4688   )

    This is a remote code execution vulnerability caused by an unchecked buffer in Client Service for NetWare. An attacker who successfully exploited this vulnerability could remotely take complete control of an affected system with full user rights.

    NOTE: Windows XP Home Edition is not vulnerable to this issue. An attacker would need to be an authenticated user with valid logon credentials in order to successfully carry out an attack on Windows Server 2003 and Windows Server 2003 Service Pack 1.



    2. Denial of Service Vulnerability in NetWare Driver ( CVE-2006-4689   )

    This is a Denial of Service Vulnerability caused by an unchecked buffer in the Client Service for NetWare. An attacker who exploited this vulnerability could cause the affected system to stop responding and automatically restart.

    NOTE: Windows XP Home Edition Service Pack 2 and Windows XP Media Center Edition 2005 are not vulnerable to this issue. An attacker would need to be an authenticated user with valid logon credentials in order to successfully carry out an attack on Windows Server 2003 and Windows Server 2003 Service Pack 1.



    Workaround

    • Remove the Client Service for NetWare if you do not need it.
    • Block TCP ports 139 and 445 at the firewall
    • Use a personal firewall
    • Enable advanced TCP/IP filtering
    • Block the affected ports by using IPSec

    Solution

    Apply appropriate updates as mentioned in the Microsoft Security Bulletin MS06-066

    NOTE: This update replaces MS005-046 on Windows XP Service Pack 2 only.

    Vendor Information


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

    References

    Secunia
    http://secunia.com/advisories/22866/

    Security Focus
    http://www.securityfocus.com/bid/20984/info
    http://www.securityfocus.com/bid/21023/info

    Security Tracker
    http://www.securitytracker.com/alerts/2006/Nov/1017224.html

    FrSirt
    http://www.frsirt.com/english/advisories/2006/4504

    CVE Name
    CVE-2006-4688
    CVE-2006-4689

    Disclaimer

    The information provided herein is on "as is" basis, without warranty of any kind.

    Contact Information

    Email: info@cert-in.org.in
    Phone: +91-11-2436857

    Postal address

    Indian Computer Emergency Response Team (CERT-In)
    Ministry of Electronics and Information Technology
    Government of India
    Electronics Niketan
    6, CGO Complex, Lodhi Road,
    New Delhi - 110 003
    India

     
    Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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