# Set the target IP and port target_ip = "192.168.1.100" target_port = 21
The backdoor was introduced by the original vsftpd author, Chris Evans. Instead, malicious actors compromised the download tarball of vsftpd 2.0.8 on some mirror sites. The compromised source code contained a backdoor that allowed remote attackers to open a root shell on port 6200 when a specific username ( :) — yes, a smiley face — was used during FTP authentication. vsftpd 208 exploit github link
However, as with many vulnerabilities, the fix was not universally applied. Many systems were not updated, and the vulnerability remained unpatched. # Set the target IP and port target_ip = "192
The backdoor code is simple. When a user attempts to log in, the server checks the username. If the username ends with a smiley face emoticon :) , the server triggers the backdoor. However, as with many vulnerabilities, the fix was
The vulnerability in VSFTPD 2.3.4 was discovered by an anonymous researcher, who published a proof-of-concept exploit on GitHub. The exploit took advantage of a buffer overflow vulnerability in the VSFTPD server, which allowed an attacker to execute arbitrary code on the system.
vsftpd-backdoor-exploit (Daniel1234mata) : A detailed guide and script for exploiting the backdoor in a lab environment.
: Use Nmap to check if the version is vulnerable: nmap --script ftp-vsftpd-backdoor -p 21 .