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Microsoft Windows XP IIS URL Request Handling Vulnerability
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Secunia Advisory:
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SA18106
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Release Date:
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2005-12-19
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Last Update:
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2007-07-10
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Popularity:
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21,800 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | Microsoft Windows XP Professional
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| Software: | Microsoft Internet Information Services (IIS) 5.x
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Binary Analysis:
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BA177 :: Available for 1 Credit 
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| CVE reference: | CVE-2005-4360
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Description:
Inge Henriksen has discovered a vulnerability in Microsoft Internet Information Services (IIS), which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
The vulnerability is caused due to a boundary error in the Internet Information Services 5.1 URL parser and can be exploited via a specially crafted URL request.
Example:
http://[host]/[dir]/.dll/%01~0
Successful exploitation requires that "[dir]" is a virtual directory configured with "Scripts & Executables" execution permissions.
NOTE: IIS will automatically restart after a crash.
Solution:
Apply patches.
Microsoft Internet Information Services (IIS) 5.1:
http://www.microsoft.com/downloads/de...=fccbfe90-f838-47df-8310-352e2fb47132
Provided and/or discovered by:
Originally reported as a DoS by Inge Henriksen.
Additional information provided to Microsoft by Watchfire.
Changelog:
2007-07-10: Added additional information about code execution vector. Updated "Solution" section.
Original Advisory:
MS07-041 (KB939373):
http://www.microsoft.com/technet/security/Bulletin/MS07-041.mspx
Inge Henriksen:
http://ingehenriksen.blogspot.com/2005/12/microsoft-iis-remote-dos-dll-url.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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