bugtraq - Re: [badroot security] AutoIndex PHP Script: XSS vulnerability

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Message-ID: <42CB09C4.1050303@mybox.it>
Date: Tue, 05 Jul 2005 22:29:24 +0000
From: mozako <mozako@...ox.it>
To: bugtraq@...urityfocus.com
Subject: Re: [badroot security] AutoIndex PHP Script: XSS vulnerability

Sorry for distraction errors.
This is the correct ADV:

_______________________________________________________

BADROOT SECURITY GROUP
Security Advisory 2005-#0x07
http://www.badroot.org
irc.us.azzurra.org ~ #badroot
_______________________________________________________

Authors .......  mozako feat shen139
Date ..........  05-07-2005
Product .......  AutoIndex PHP Script
Type ..........  Cross Site Scripting (XSS) vulnerability

o Description:
=============================
AutoIndex PHP Script is a simply website directory indexer and file 
manager.

o Vulnerability Description:
=============================
287    [...]
288    $search = (isset($_GET['search']) ? $_GET['search'] : '');
289    $search_mode = (isset($_GET['searchMode']) ? $_GET['searchMode'] 
: '');
290    [...]

At line 289 AutoIndex PHP Script doesn't validate '$_GET' variable 
($search).
Consequently, a remote user can create an specially crafted
URL that would execute arbitrary code in a user's browser within
the trust relationship between the browser and the server.

o Products:
=============================
    - AutoIndex PHP Script v. 1.5.2 (tested)

o Solution:
=============================
Sanitize html source before writing it with a simply htmlspecialchars(...).

o Proof of concept:
=============================
http://www.vuln-site.org/index.php?search='>%3Cscript%3Ealert%28%27owned%27%29%3Blocation.href%3D%27http%3A%2F%2Fwww.badroot.org%27%3B%3C%2Fscript%3E&dir=&searchMode= 

Original ADV: http://www.badroot.org/advisories/SA0x07