vsftpd -v
Because the backdoor was intentionally inserted into the source code on the master site (not by the original author), it was removed within days of discovery. For modern users, the "fix" involves ensuring you are not using the compromised version: vsftpd 208 exploit github fix
netstat -tulpn | grep :21 ps aux | grep vsftpd vsftpd -v Because the backdoor was intentionally inserted
system("/bin/sh"); exit(0);
: Most modern distributions have patched versions. Use sudo apt update && sudo apt install vsftpd on Ubuntu/Debian or sudo yum update vsftpd on CentOS/RHEL. vsftpd 208 exploit github fix
Because this was a supply-chain attack on the source code, the primary "fix" is to ensure you are not running the compromised 2.3.4 version. 1. Upgrade Immediately