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Guestserver "message" Script Insertion Vulnerability
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Secunia Advisory:
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SA13795
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Release Date:
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2005-01-12
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Last Update:
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2006-01-30
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Popularity:
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5,688 views
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Critical:
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Moderately critical
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Impact:
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Cross Site Scripting
Exposure of system information
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | Guestserver 4.x
Guestserver 5.x
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| CVE reference: | CVE-2005-4222
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Description:
SmOk3 has discovered a vulnerability in Guestserver, which can be exploited by malicious people to conduct script insertion attacks.
Input passed to the "message" parameter is not properly sanitised before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious guestbook entry is viewed.
It is reportedly also possible to disclose the full path to "guestserver.cgi" by accessing it with an invalid "user" parameter.
The vulnerability has been confirmed in version 4.13 and has also been reported in version 5. Other versions may also be affected.
Solution:
Set "guestbook.strip_html" to "1" in "guestbook.config" (not default setting).
Provided and/or discovered by:
SmOk3
Changelog:
2005-12-13: Added Guestserver 4.x as affected. Updated "Description" and "Solution" sections.
2006-01-30: Added CVE reference.
Original Advisory:
http://www.systemsecure.org/public/ss10012005.txt
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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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