Vsftpd 2.0.8 Exploit

Improper handling of certain "glob" expressions (like * or ? ) in STAT commands can trigger excessive CPU and memory usage, leading to a service crash. The Infamous 2.3.4 Backdoor Comparison

There is no major academic paper specifically titled for an exploit in , as this version is generally considered stable and secure. Most high-level research and "helpful papers" focus on the infamous vsftpd 2.3.4 backdoor (CVE-2011-2523), which is frequently used in cybersecurity education and Capture The Flag (CTF) challenges like "Stapler".

use exploit/unix/ftp/vsftpd_234_backdoor set RHOSTS <target-ip> set RPORT 21 run vsftpd 2.0.8 exploit

When a user connects to the backdoored VSFTPD 2.0.8 server and provides a username ending with the sequence :) (colon + closing parenthesis), the server does treat it as a normal login attempt.

VSFTPD (Very Secure FTP Daemon) is one of the most popular FTP servers for Unix-like systems, including Linux and BSD. Its claim to fame is being the default FTP server for Ubuntu, Red Hat, and CentOS. Improper handling of certain "glob" expressions (like * or

Version 2.0.8 does not contain this malicious code, as the backdoor was injected into source archives much later, in July 2011.

Unlike the high-profile version 2.3.4, version 2.0.8 is generally considered secure in its default state. However, its age makes it vulnerable to legacy issues and improper configuration: Most high-level research and "helpful papers" focus on

Once you find the open port (e.g., 6209):