Package: vsftpd Version: version 3.0.3
Description: It seems vsftpd blocks/hang if you use a PAM module which call a subprocess like pam_exec. See this thread on StackExchange, which also claim the CentOS package have fixed the bug. https://askubuntu.com/questions/406486/vsftpd-hanging-when-using-pam-exec-or-pam-script#answer-778448
