Vsftpd 208 Exploit Github Link -

: If a user attempts to log in with a username that ends in a "smiley face" sequence — — the server immediately spawns a shell listening on TCP port 6200 root privileges

: If you suspect a server is compromised, scan for an open listener on port 6200. Manual Test : telnet 21 USER user:) PASS password Use code with caution. Copied to clipboard vsftpd 208 exploit github link

In July 2011, an unknown attacker compromised the master download server for vsftpd and replaced the legitimate source code for version 2.3.4 with a backdoored version. The developer, Chris Evans, had famously designed vsftpd (which stands for "Very Secure FTP Daemon") to be impenetrable, making the irony of a supply chain hack particularly sharp. How the Backdoor Works (The "Smiley Face" Exploit) : If a user attempts to log in