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Microsoft IIS "500-100.asp" Source Code Disclosure
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Secunia Advisory:
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SA16548
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Release Date:
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2005-08-23
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Last Update:
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2005-09-08
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Critical:
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Less critical
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Impact:
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Exposure of sensitive information
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Where:
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From remote
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Solution Status:
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Vendor Workaround
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| Software: | Microsoft Internet Information Services (IIS) 5.x
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| | CVE reference: | CVE-2005-2678 (Secunia mirror)
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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 gain knowledge of potentially sensitive information.
The vulnerability is caused due the "500-100.asp" script making assumptions based on the user-controlled "SERVER_NAME" variable. This can be exploited to gain knowledge of script contents when an error is encountered via a specially crafted HTTP request.
The vulnerability has been confirmed in IIS 5.1 and has also been reported in version 5.0. Version 6.0 is reportedly not affected.
Solution:
The vendor recommends modifying the 500-100.asp error page manually, or removing the "All Unassigned" binding for all sites and specify required host names (see KB906910 for details).
Provided and/or discovered by:
Inge Henriksen
Changelog:
2005-08-24: Updated advisory.
2005-08-25: Added CVE reference.
2005-09-08: Removed version 6.0 as affected, added link to KB906910 and updated "Solution" section.
Original Advisory:
http://ingehenriksen.blogspot.com/200...te-iis-5x-and-iis-60-server-name.html
Microsoft (KB906910):
http://support.microsoft.com/kb/906910
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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