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Microsoft Windows Embedded Web Font Buffer Overflow Vulnerability

Risk
High

Date Discovered
01-10-2006

Description
Microsoft Windows is susceptible to a remotely exploitable buffer overflow vulnerability. This issue is due to a failure of the software to properly bounds check user-supplied input prior to copying it to an insufficiently sized memory buffer.

This issue allows remote attackers to execute arbitrary machine code in the context of the vulnerable software on the targeted user's computer.

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 January 11, 2006.

Symantec Enterprise Security Manager Network Assessment Module
Symantec Enterprise Security Manager Network Assessment Module detects and reports this vulnerability. Click here for the advisory released January 18, 2006.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released January 11, 2006.

Symantec NetRecon
Symantec NetRecon detects and reports this vulnerability. Click here for the advisory released March 22, 2006.

Platforms Affected
Avaya DefinityOne Media Servers
Avaya IP600 Media Servers
Avaya S3400 Message Application Server
Avaya S8100 Media Servers

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 98
Microsoft Windows 98SE
Microsoft Windows ME
Microsoft Windows Server 2003 Datacenter Edition SP1
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Datacenter Edition 64-bit SP1
Microsoft Windows Server 2003 Datacenter Edition 64-bit
Microsoft Windows Server 2003 Datacenter x64 Edition
Microsoft Windows Server 2003 Enterprise Edition SP1
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Enterprise Edition 64-bit SP1
Microsoft Windows Server 2003 Enterprise Edition 64-bit
Microsoft Windows Server 2003 Enterprise x64 Edition
Microsoft Windows Server 2003 Standard Edition SP1
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Standard x64 Edition
Microsoft Windows Server 2003 Web Edition SP1
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP Home SP2
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP Media Center Edition SP2
Microsoft Windows XP Media Center Edition SP1
Microsoft Windows XP Media Center Edition
Microsoft Windows XP Professional SP2
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Tablet PC Edition SP2
Microsoft Windows XP Tablet PC Edition SP1
Microsoft Windows XP Tablet PC Edition

Recommendations
Do not accept communications that originate from unknown or untrusted sources.
Do not follow links, or open email from unknown or untrusted sources.

Implement multiple redundant layers of security.
An attacker's ability to exploit this vulnerability to execute arbitrary code may be hindered through the use of various memory protection schemes. Where possible, implement the use of non-executable and randomly mapped memory segments.

Modify default configuration files, to disable any unwanted behaviour.
As exploitation requires users to view HTML content, disabling HTML rendering in email clients may mitigate the possibility of remote exploitation. Disabling HTML content in email clients may reduce their functionality.

Run all software as a non-privileged user with minimal access rights.
Non-administrative software should be run as a non-administrative user with the minimal amount of privileges required to successfully operate. This will limit the potential damage that successful exploitation may achieve.

Fixes are available:


Microsoft Windows 2000 Advanced Server SP4:

Microsoft Patch Security Update for Windows 2000 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=DC6C2FE8-3C81-4661-994B-4146775BF590

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 Patch Security Update for Windows 2000 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=DC6C2FE8-3C81-4661-994B-4146775BF590

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 Windows 2000 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=DC6C2FE8-3C81-4661-994B-4146775BF590

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 Patch Security Update for Windows 2000 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=DC6C2FE8-3C81-4661-994B-4146775BF590

Microsoft Windows 2000 Server SP3:
Microsoft Windows 2000 Server SP2:
Microsoft Windows 2000 Server SP1:
Microsoft Windows 2000 Server :
Microsoft Windows 98 :
Microsoft Windows 98SE :
Microsoft Windows ME :
Microsoft Windows Server 2003 Datacenter Edition SP1:
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Datacenter Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Datacenter Edition 64-bit SP1:
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5
Microsoft Upgrade Security Update for Windows Server 2003 for Itanium-based systems (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=E39D2E29-8934-4AA1-844D-11EFA57D9CC5

Microsoft Windows Server 2003 Datacenter Edition 64-bit :
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5
Microsoft Upgrade Security Update for Windows Server 2003 for Itanium-based systems (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=E39D2E29-8934-4AA1-844D-11EFA57D9CC5

Microsoft Windows Server 2003 Datacenter x64 Edition :
Microsoft Upgrade Windows Server x64 Edition (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=80B05C56-5BCE-4262-8142-AF0D8A7BC388

Microsoft Windows Server 2003 Enterprise Edition SP1:
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Enterprise Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Enterprise Edition 64-bit SP1:
Microsoft Upgrade Security Update for Windows Server 2003 for Itanium-based systems (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=E39D2E29-8934-4AA1-844D-11EFA57D9CC5

Microsoft Windows Server 2003 Enterprise Edition 64-bit :
Microsoft Upgrade Security Update for Windows Server 2003 for Itanium-based systems (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=E39D2E29-8934-4AA1-844D-11EFA57D9CC5

Microsoft Windows Server 2003 Enterprise x64 Edition :
Microsoft Upgrade Windows Server x64 Edition (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=80B05C56-5BCE-4262-8142-AF0D8A7BC388

Microsoft Windows Server 2003 Standard Edition SP1:
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Standard Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Standard x64 Edition :
Microsoft Upgrade Windows Server x64 Edition (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=80B05C56-5BCE-4262-8142-AF0D8A7BC388

Microsoft Windows Server 2003 Web Edition SP1:
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows Server 2003 Web Edition :
Microsoft Patch Security Update for Windows Server 2003 (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=5FC12654-486F-45BF-8D34-BDF0998869C5

Microsoft Windows XP Home SP2:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Home SP1:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Home :
Microsoft Windows XP Media Center Edition SP2:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Media Center Edition SP1:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Media Center Edition :
Microsoft Windows XP Professional SP2:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Professional SP1:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Professional :
Microsoft Windows XP Professional x64 Edition :
Microsoft Upgrade Security Update for Windows XP x64 Edition (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=1990B2CF-AE88-4849-AEAB-3F833969E197

Microsoft Windows XP Tablet PC Edition SP2:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Tablet PC Edition SP1:
Microsoft Patch Security Update for Windows XP (KB908519)
http://www.microsoft.com/downloads/details.aspx?familyid=6DAEA2AF-3723-4CDF-B5BD-B21AC75B5243

Microsoft Windows XP Tablet PC Edition :

References
Source: Microsoft Security Bulletin MS06-002
URL: http://www.microsoft.com/technet/security/Bulletin/MS06-002.mspx

Source: Microsoft Windows Update
URL: http://www.microsoft.com/Windowsupdate

Source: Windows 2000 Homepage
URL: http://www.microsoft.com/windows2000/

Source: Windows XP Homepage
URL: http://www.microsoft.com/windowsxp/default.asp

Credits
eEye Digital Security reported this issue to the vendor.


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