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Microsoft Windows Shell and Web View Three Vulnerabilities
Secunia Advisory: SA17168
Release Date: 2005-10-11
Last Update: 2005-11-21
Popularity: 13,624 views

Critical:
Moderately critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

OS:Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP Embedded
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional

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CVE reference:CVE-2005-2117
CVE-2005-2118
CVE-2005-2122


Description:
Three vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious people to compromise a user's system.

1) A boundary error exists in CSRSS when handling the properties associated a ".lnk" (shortcut) file of a console application. This can be exploited to cause a buffer overflow and allows arbitrary code execution when the user opens a specially-crafted ".lnk" file with an overly long font name property.

2) A boundary error exists in Windows Explorer when handling the properties associated with a ".lnk" file of a console application. This can be exploited to cause a buffer overflow via a specially-crafted ".lnk" file with an overly long font name property.

Successful exploitation allows arbitrary code with the privileges of the user viewing the properties of the ".lnk" file.

3) An error exists in the way Windows Explorer sanitises HTML characters embedded in certain file fields when allowing a file to be previewed in the Web View. This can be exploited in script injection attacks to execute arbitrary script code with privileges of the user viewing the malicious file.

Solution:
Apply patches.

Microsoft Windows 2000 (requires Service Pack 4):
http://www.microsoft.com/downloads/de...=1F063C4A-B0BF-49C6-928B-F1F076C69612

Microsoft Windows XP (requires Service Pack 1 or Service Pack 2):
http://www.microsoft.com/downloads/de...=F7241DEB-9E2D-401A-9D71-10ACAB4450AF

Microsoft Windows XP Professional x64 Edition:
http://www.microsoft.com/downloads/de...=594AD01B-F333-4C56-9C12-D1A8B82F2A6E

Microsoft Windows XP Embedded (with SP2):
http://www.microsoft.com/downloads/de...=e7b6d199-7607-44a8-96fd-5a2386427bd9

Microsoft Windows XP Embedded (with SP1):
http://www.microsoft.com/downloads/de...=47633799-2103-4fc2-b63d-a9581a2d2f2d

Microsoft Windows Server 2003 (with or without Service Pack 1):
http://www.microsoft.com/downloads/de...=1A4FCFDE-E549-4078-A180-076A23CB8BB7

Microsoft Windows Server 2003 (Itanium) (with or without SP 1):
http://www.microsoft.com/downloads/de...=3BA63AF8-3D36-4F3C-BFEE-11B62572AF73

Microsoft Windows Server 2003 x64 Edition:
http://www.microsoft.com/downloads/de...=994B14B4-EE98-4B61-BDBE-CA5C20094855

Provided and/or discovered by:
The vendor credits the following:
1-2) Cesar Cerrudo of Argeniss
3) Brett Moore of security-assessment.com

Changelog:
2005-10-12: Added link to US-CERT vulnerability note.
2005-10-20: Added information from Cesar Cerrudo. Updated "Description" and "Original Advisory" sections.
2005-11-21: Added patch information for Windows XP Embedded.

Original Advisory:
MS05-049 (KB900725):
http://www.microsoft.com/technet/security/Bulletin/MS05-049.mspx

Argeniss:
http://www.argeniss.com/research/MSBugPaper.pdf

Other References:
US-CERT VU#922708
http://www.kb.cert.org/vuls/id/922708


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