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Microsoft Messenger Service Buffer Overrun Vulnerability

Risk
High

Date Discovered
10-15-2003

Description
Microsoft Messenger Service is prone to a remotely exploitable buffer overrun vulnerability. This is due to insufficient bounds checking of messages before they are passed to an internal buffer. Exploitation could result in a denial of service or in execution of malicious code in Local System context, potentially allowing for full system compromise.

Symantec ManHunt 3.0
Users of Symantec Manhunt 3.0 can update to the latest Security Update to detect attempts to exploit this vulnerability. Click here for more information.

Norton Internet Security / Norton Internet Security Professional
An update for these products to detect attempts to exploit this vulnerability was released on October 22, 2003. Users of these products should run LiveUpdate to ensure protection against this threat.

Symantec Enterprise Firewall 7.0.x and Symantec VelociRaptor 1.5
By default, Symantec's full application inspection firewall technology protects against this Microsoft vulnerability by blocking UDP broadcast packets, RPC port 135 and NetBIOS ports (137-> 139). For Windows-based firewalls, unique initial and ongoing system hardening protects the firewall operating system itself, which includes disabling the Microsoft Messenger Service, preventing any attempts to exploit this vulnerability.

Symantec Client Firewall
An update for Symantec Client Firewall to detect attempts to exploit this vulnerability was released on October 21, 2003. Symantec Client Firewall users should run LiveUpdate to ensure protection against this threat.

Symantec Client Security
An update for Symantec Client Security to detect attempts to exploit this vulnerability was released on October 21, 2003. Symantec Client Security users should run LiveUpdate to ensure protection against this threat.

Symantec Gateway Security 1.0
An update for Symantec Gateway Security to detect attempts to exploit this vulnerability is available. Symantec Gateway Security users should run LiveUpdate to ensure protection against this threat.
Symantec's full application inspection firewall:
By default, Symantec's full application inspection firewall technology protects against this Microsoft vulnerability by blocking UDP broadcast packets, RPC port 135 and NetBIOS ports (137-> 139).

Symantec Host IDS 4.1
Symantec Host IDS 4.1 Agents for Windows NT/XP/2000 trigger the "Agent Error Message" Warning event when attempts to exploit this vulnerability are detected.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released October 16, 2003.

Symantec Enterprise Security Manager
Symantec Enterprise Security Manager™ posted an update to the OS Patch Policy that detects and reports systems that are not patched against this vulnerability. Click here for the advisory released October 16, 2003.

Components Affected
Microsoft Windows 2000 Advanced Server SP4
Microsoft Windows 2000 Advanced Server SP3
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server SP4
Microsoft Windows 2000 Datacenter Server SP3
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional SP4
Microsoft Windows 2000 Professional SP3
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server SP4
Microsoft Windows 2000 Server SP3
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server
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 NT Server 4.0 SP6a
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 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
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 Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Datacenter Edition 64-bit
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Enterprise Edition 64-bit
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP 64-bit Edition SP1
Microsoft Windows XP 64-bit Edition
Microsoft Windows XP 64-bit Edition Version 2003
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional

Recommendations
Block external access at the network boundary, unless service is required by external parties.
Restrict external access to all ports and services that are not explicitly intended to be accessible by remote parties. This will help to limit exposure to this and other latent vulnerabilities. If appropriate, firewalls should also be deployed on individual systems to restrict access.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy network intrusion detection systems (NIDS) to monitor network traffic for any suspicious or anomalous activity. This could help to detect exploitation attempts or malicious activity that may occur as a result of successful exploitation.

Disable any services that are not needed.
Disable the Windows Messenger Service if it is not explicitly required. Disabling the service should be followed by a reboot.

Microsoft has released updates to address this issue.


Microsoft Windows 2000 Advanced Server SP4:

Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Advanced Server SP3:
Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Advanced Server SP2:
Microsoft Patch Security Update for Microsoft Windows 2000 Service Pack 2: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=A0061377-1683-4C13-9527-5534F6C7CF85&displaylang=en

Microsoft Windows 2000 Advanced Server SP1:
Microsoft Windows 2000 Advanced Server :
Microsoft Windows 2000 Datacenter Server SP4:
Microsoft Windows 2000 Datacenter Server SP3:
Microsoft Windows 2000 Datacenter Server SP2:
Microsoft Windows 2000 Datacenter Server SP1:
Microsoft Windows 2000 Datacenter Server :
Microsoft Windows 2000 Professional SP4:
Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Professional SP3:
Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Professional SP2:
Microsoft Patch Security Update for Microsoft Windows 2000 Service Pack 2: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=A0061377-1683-4C13-9527-5534F6C7CF85&displaylang=en

Microsoft Windows 2000 Professional SP1:
Microsoft Windows 2000 Professional :
Microsoft Windows 2000 Server SP4:
Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Server SP3:
Microsoft Patch Security Update for Microsoft Windows 2000: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=99F1B40D-906A-4945-A021-4B494CCCBDE0&displaylang=en

Microsoft Windows 2000 Server SP2:
Microsoft Patch Security Update for Microsoft Windows 2000 Service Pack 2: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=A0061377-1683-4C13-9527-5534F6C7CF85&displaylang=en

Microsoft Windows 2000 Server SP1:
Microsoft Windows 2000 Server :
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 NT Server 4.0 SP6a:
Microsoft Patch Security Update for Microsoft Windows NT Server 4.0: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=B1949456-996A-485A-9A28-79FD79F26A1B&displaylang=en

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 Terminal Server 4.0 SP6:
Microsoft Patch Security Update for Microsoft Windows NT Server Terminal Server Edition: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=64AB4B66-1A6E-4264-93A8-26CDB98B05A8&displaylang=en

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:
Microsoft Windows NT Workstation 4.0 SP6a:
Microsoft Patch Security Update for Microsoft Windows NT Workstation 4.0: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=7597FCF4-6615-4074-9E46-A17D808ED38D&displaylang=en

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 Server 2003 Datacenter Edition :
Microsoft Windows Server 2003 Datacenter Edition 64-bit :
Microsoft Windows Server 2003 Enterprise Edition :
Microsoft Patch Security Update for Microsoft Windows Server 2003: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=1DF106F3-7EC4-4EB0-9143-C1E3C9E2F5F8&displaylang=en

Microsoft Windows Server 2003 Enterprise Edition 64-bit :
Microsoft Patch Security Update for Microsoft Windows Server 2003 64-bit Edition: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=8B990946-84C8-4C91-899C-5A44EC13174E&displaylang=en

Microsoft Windows Server 2003 Standard Edition :
Microsoft Patch Security Update for Microsoft Windows Server 2003: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=1DF106F3-7EC4-4EB0-9143-C1E3C9E2F5F8&displaylang=en

Microsoft Windows Server 2003 Web Edition :
Microsoft Patch Security Update for Microsoft Windows Server 2003: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=1DF106F3-7EC4-4EB0-9143-C1E3C9E2F5F8&displaylang=en

Microsoft Windows XP 64-bit Edition SP1:
Microsoft Windows XP 64-bit Edition :
Microsoft Patch Security Update for Microsoft Windows XP 64-bit Edition: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=2BE95254-4C65-4CA5-80A5-55FDF5AA2296&displaylang=en

Microsoft Windows XP 64-bit Edition Version 2003 :
Microsoft Patch Security Update for Microsoft Windows Server 2003 64-bit Edition: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=8B990946-84C8-4C91-899C-5A44EC13174E&displaylang=en

Microsoft Windows XP Home SP1:
Microsoft Patch Security Update for Microsoft Windows XP: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=F02DA309-4B0A-4438-A0B9-5B67414C3833&displaylang=en

Microsoft Windows XP Home :
Microsoft Windows XP Professional SP1:
Microsoft Patch Security Update for Microsoft Windows XP: KB828035
http://www.microsoft.com/downloads/details.aspx?FamilyId=F02DA309-4B0A-4438-A0B9-5B67414C3833&displaylang=en

Microsoft Windows XP Professional :

References
Source: Microsoft Security Bulletin MS03-043
URL: http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-043.asp

Credits
Discovery is credited to The Last Stage of Delirium Research Group.


Copyright (c) 2003 by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from symsecurity@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.

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