def send_callback(): callback_url = 'file:///proc/self/environ' with open(callback_url, 'w') as f: f.write('EVENT_OCCURRED')
This file is a goldmine for privilege escalation or information disclosure because it often contains: callback-url-file-3A-2F-2F-2Fproc-2Fself-2Fenviron
To understand how the exploit works, we can break the string down into its two core components: the application parameter and the targeted system file. callback-url-file-3A-2F-2F-2Fproc-2Fself-2Fenviron