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Microsoft Internet Explorer Web Folder Behaviors Cross-Domain Scripting Vulnerability

Risk
High

Date Discovered
08-09-2005

Description
Microsoft Internet Explorer is prone to a security vulnerability that may let a Web page execute malicious script code in the context of an arbitrary domain or browser security zone. This issue is the result of a security flaw in the browser security model when handling URIs when a Web folder view is rendered.

If exploited to access a foreign domain, this could allow script code embedded in a malicious Web page to access the properties of another site that the victim of the attack may trust. This would likely be exploited to steal credentials or sensitive information from the victim. The issue could also be exploited to execute arbitrary code by running malicious script code in a browser security zone with lowered security settings, such as the Local Machine, Trusted Sites or Intranet zone. Code execution would occur in the context of the currently logged in user.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released August 11, 2005.

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 August 11, 2005.

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 August 25, 2005.

Platforms Affected
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Server
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Terminal Services
Microsoft Windows 2000 Terminal Services SP1
Microsoft Windows 2000 Terminal Services SP2
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows 98SE
Microsoft Windows ME
Microsoft Windows NT Enterprise Server 4.0
Microsoft Windows NT Enterprise Server 4.0 SP1
Microsoft Windows NT Enterprise Server 4.0 SP2
Microsoft Windows NT Enterprise Server 4.0 SP3
Microsoft Windows NT Enterprise Server 4.0 SP4
Microsoft Windows NT Enterprise Server 4.0 SP5
Microsoft Windows NT Enterprise Server 4.0 SP6
Microsoft Windows NT Enterprise Server 4.0 SP6a
Microsoft Windows NT Server 4.0
Microsoft Windows NT Server 4.0 SP1
Microsoft Windows NT Server 4.0 SP2
Microsoft Windows NT Server 4.0 SP3
Microsoft Windows NT Server 4.0 SP4
Microsoft Windows NT Server 4.0 SP5
Microsoft Windows NT Server 4.0 SP6
Microsoft Windows NT Server 4.0 SP6a
Microsoft Windows NT Terminal Server 4.0
Microsoft Windows NT Terminal Server 4.0 SP1
Microsoft Windows NT Terminal Server 4.0 SP2
Microsoft Windows NT Terminal Server 4.0 SP3
Microsoft Windows NT Terminal Server 4.0 SP4
Microsoft Windows NT Terminal Server 4.0 SP5
Microsoft Windows NT Terminal Server 4.0 SP6
Microsoft Windows NT Workstation 4.0
Microsoft Windows NT Workstation 4.0 SP1
Microsoft Windows NT Workstation 4.0 SP2
Microsoft Windows NT Workstation 4.0 SP3
Microsoft Windows NT Workstation 4.0 SP4
Microsoft Windows NT Workstation 4.0 SP5
Microsoft Windows NT Workstation 4.0 SP6
Microsoft Windows NT Workstation 4.0 SP6a
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 Home
Microsoft Windows XP Professional

Components Affected
Microsoft Internet Explorer 5.0.1 SP4
Microsoft Internet Explorer 5.0.1 SP3
Microsoft Internet Explorer 5.0.1 SP2
Microsoft Internet Explorer 5.0.1 SP1
Microsoft Internet Explorer 5.0.1
Microsoft Internet Explorer 5.5 SP2
Microsoft Internet Explorer 5.5 SP1
Microsoft Internet Explorer 5.5
Microsoft Internet Explorer 6.0 SP2
Microsoft Internet Explorer 6.0 SP1
Microsoft Internet Explorer 6.0

Recommendations
Run all client software as a non-privileged user with minimal access rights.
All non-administrative tasks, such as browsing the Web and reading email, should be performed as an unprivileged user with minimal access rights.

Do not follow links provided by unknown or untrusted sources.
Users should avoid visiting Web sites of questionable integrity or following links provided by an unfamiliar or untrusted source.

Set web browser security to disable the execution of script code or active content.
Disabling support for scripting and active content in the Internet Zone may limit exposure to this and other vulnerabilities.

Microsoft has released fixes to address supported versions of the software. Fixes for Internet Explorer on Windows 98/98SE/ME may be obtained through Windows Update.


Microsoft Internet Explorer 5.0.1 SP4:

Microsoft Patch Cumulative Security Update for Internet Explorer 5.01 for Windows 2000 Service Pack 4 (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=194E0EE7-919C-4A8B-AD8D-01A4FE771942&displaylang=en

Microsoft Internet Explorer 5.0.1 SP3:
Microsoft Internet Explorer 5.0.1 SP2:
Microsoft Internet Explorer 5.0.1 SP1:
Microsoft Internet Explorer 5.0.1:
Microsoft Internet Explorer 5.5 SP2:
Microsoft Internet Explorer 5.5 SP1:
Microsoft Internet Explorer 5.5:
Microsoft Internet Explorer 6.0 SP2:
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows XP Service Pack 2 (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=648B6F0E-1695-44E5-826A-43406DF4858E&displaylang=en

Microsoft Internet Explorer 6.0 SP1:
Microsoft Patch Cumulative Security Update for Internet Explorer 6 Service Pack 1 for Windows XP/2000 (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=68300B15-1CF9-45FB-875E-2EF6D2FBC9ED&displaylang=en

Microsoft Internet Explorer 6.0:
Microsoft Patch Cumulative Security Update for Internet Explorer Microsoft Windows Server 2003 (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=0B96EC3-E954-423A-9AB0-5712B9F14637&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows Server 2003 Itanium 64-bit (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=C24D3738-213A-41B8-84A3-2842B34D7B10&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows Server 2003 x64-bit Edition (KB896727)
http://www.microsoft.com/downloads/details.aspx?familyid=F2D544E7-33F5-4A65-A574-15495B05B883&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows XP Professional x64-bit Edition (KB8967
http://www.microsoft.com/downloads/details.aspx?familyid=1181BC67-0A1D-4A06-99AC-5B2BC6DFE0F6&displaylang=en

References
Source: Microsoft Security Bulletin MS05-038
URL: http://www.microsoft.com/technet/security/Bulletin/MS05-038.mspx

Credits
This issue was announced by Microsoft.


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