From e846bf82e8b9994f032b541446e805434ff6b780 Mon Sep 17 00:00:00 2001
From: Yan <yans@yancomm.net>
Date: Mon, 24 Feb 2025 01:39:03 -0700
Subject: [PATCH] udp1

---
 intercepting-communication/module.yml         |  4 +++
 intercepting-communication/sniff-cookie/run   |  1 -
 intercepting-communication/udp-1/.init        |  1 +
 .../udp-1/DESCRIPTION.md                      |  1 +
 intercepting-communication/udp-1/run          | 33 +++++++++++++++++++
 5 files changed, 39 insertions(+), 1 deletion(-)
 create mode 120000 intercepting-communication/udp-1/.init
 create mode 100644 intercepting-communication/udp-1/DESCRIPTION.md
 create mode 100755 intercepting-communication/udp-1/run

diff --git a/intercepting-communication/module.yml b/intercepting-communication/module.yml
index 43171c53..8fd934b7 100644
--- a/intercepting-communication/module.yml
+++ b/intercepting-communication/module.yml
@@ -29,6 +29,10 @@ challenges:
   name: TCP
 - id: level-11
   name: TCP Handshake
+- id: udp-1
+  name: UDP
+  visibility:
+    start: "2029-11-04T13:00:00-07:00"
 - id: level-12
   name: ARP
 - id: level-13
diff --git a/intercepting-communication/sniff-cookie/run b/intercepting-communication/sniff-cookie/run
index 39572475..1e078490 100755
--- a/intercepting-communication/sniff-cookie/run
+++ b/intercepting-communication/sniff-cookie/run
@@ -3,7 +3,6 @@
 import requests
 import random
 import psutil
-import socket
 import string
 import flask
 import time
diff --git a/intercepting-communication/udp-1/.init b/intercepting-communication/udp-1/.init
new file mode 120000
index 00000000..ea4ba499
--- /dev/null
+++ b/intercepting-communication/udp-1/.init
@@ -0,0 +1 @@
+../.init
\ No newline at end of file
diff --git a/intercepting-communication/udp-1/DESCRIPTION.md b/intercepting-communication/udp-1/DESCRIPTION.md
new file mode 100644
index 00000000..5c5c2517
--- /dev/null
+++ b/intercepting-communication/udp-1/DESCRIPTION.md
@@ -0,0 +1 @@
+You've used TCP, 
diff --git a/intercepting-communication/udp-1/run b/intercepting-communication/udp-1/run
new file mode 100755
index 00000000..6e41ca4e
--- /dev/null
+++ b/intercepting-communication/udp-1/run
@@ -0,0 +1,33 @@
+#!/usr/bin/exec-suid --real -- /usr/bin/python -I
+
+import psutil
+import socket
+import os
+
+from dojjail import Host, Network
+
+flag = open("/flag").read()
+parent_process = psutil.Process(os.getppid())
+
+class ServerHost(Host):
+    def entrypoint(self):
+        server_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        server_socket.bind(("0.0.0.0", 31337))
+        while True:
+            try:
+                client_message, (client_host, client_port) = server_socket.recvfrom(1024)
+                while True:
+                    if not client_message:
+                        break
+                    if client_message == "Hello, World!\n":
+                        server_socket.sendto(flag.encode(), (client_host, client_port))
+                        break
+            except ConnectionError:
+                continue
+
+user_host = Host("ip-10-0-0-1", privileged_uid=parent_process.uids().effective)
+server_host = ServerHost("ip-10-0-0-2")
+network = Network(hosts={user_host: "10.0.0.1", server_host: "10.0.0.2"}, subnet="10.0.0.0/24")
+network.run()
+
+user_host.interactive(environ=parent_process.environ())