Donato Ferrante


Application: GWeb HTTP Server
http://freshmeat.net/projects/gweb/

Version: 0.6

Bug: directory traversal bug

Author: Donato Ferrante
e-mail: fdonato@autistici.org
web: www.autistici.org/fdonato


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1. Description
2. The bug
3. The code
4. The Fix



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1. Description:
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Vendor's Description:

"GWeb is a project to develop an HTTP server using Java, making it
small and portable. It will run on any system running the Java
Runtime Environment."


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2. The bug:
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The program doesn't check for malicious patterns like "/../", so an
attacker is able to see and download all the files on the remote
system simply using a browser.



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3. The code:
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To test the vulnerability:

http://[host]/../../../../../../windows/system.ini

or:

http://[host]/../someFile



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4. The Fix:
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No fix.
The vendor has not answered to my signalations.

If you want, you can use my following little patch, that should fix
the bug for this version of GWeb HTTP Server:

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