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Improve check_web_enrollment function to identify ESC8 on HTTP/HTTPS #203

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Improve check_web_enrollment function to identify ESC8 on HTTP/HTTPS #203

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38 changes: 19 additions & 19 deletions certipy/commands/find.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,11 @@
import copy
import json
import os
import requests
import socket
import struct
import time
import urllib3
import zipfile
from collections import OrderedDict
from datetime import datetime
Expand Down Expand Up @@ -290,8 +292,12 @@ def find(self):
)

try:
web_enrollment = self.check_web_enrollment(ca)
web_enrollment = "Enabled" if web_enrollment else "Disabled"
for port in (80, 443):
web_enrollment = self.check_web_enrollment(ca, port)
web_enrollment = "Enabled" if web_enrollment else "Disabled"

if web_enrollment == "Enabled":
break
except Exception as e:
logging.warning(
"Failed to check Web Enrollment for CA %s: %s"
Expand Down Expand Up @@ -685,30 +691,24 @@ def output_bloodhound_data(
)
)

def check_web_enrollment(self, ca: LDAPEntry) -> bool:
def check_web_enrollment(self, ca: LDAPEntry, port) -> bool:
target_name = ca.get("dNSHostName")

target_ip = self.target.resolver.resolve(target_name)
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(self.target.timeout)

logging.debug("Connecting to %s:80" % target_ip)
sock.connect((target_ip, 80))
sock.sendall(
"\r\n".join(
["HEAD /certsrv/ HTTP/1.1", "Host: %s" % target_name, "\r\n"]
).encode()
channel = "http" if port == 80 else "https"
url = "%s://%s/certsrv" % (channel, target_ip)

logging.debug("Connecting to %s:%d" % (target_ip, port))
response = requests.head(
url, headers={ "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.2365.80" },
timeout=30, verify=False
)
resp = sock.recv(256)
sock.close()
head = resp.split(b"\r\n")[0].decode()

return " 404 " not in head
except ConnectionRefusedError:
return False
except socket.timeout:
return response.status_code == 401
except requests.exceptions.Timeout:
return False
except Exception as e:
logging.warning(
Expand Down