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.
Donato Ferrante
Application: Yawcam
http://www.yawcam.com
Version: 0.2.5
Bug: directory traversal
Date: 21-Apr-2005
Author: Donato Ferrante
e-mail: fdonato (at) autistici (dot) org [email concealed]
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:
"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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