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TorrentFlux file Script Insertion



TITLE:
TorrentFlux ?file? Script Insertion

CRITICAL:
Moderate

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
TorrentFlux 2.x

DESCRIPTION:
I have discovered a vulnerability in TorrentFlux, which can be exploited by 
malicious users to conduct script insertion attacks.

Input passed to the ?file? variable is not properly sanitised before being 
used. This can be exploited to insert arbitrary HTML and script code, which 
will be executed in an administrator?s browser session in context of an 
affected site when the ?Activity Log? is viewed. An example is attempting to 
login with an incorrect username or password. Where the username field of 
/login.php contains the arbitrary code.

The vulnerability has been confirmed in version 2.1. Other versions may also be 
affected.

SOLUTION:

Edit the source code to ensure that input is properly sanitised.

/admin.php

Line 338:

$output .= htmlentities($file, ENT_QUOTES); 

ORIGINAL ADVISORY:
http://www.stevenroddis.com.au/2006/10/17/torrentflux-file-script-insertion/