Updated proftpd package fixes security vulnerabilities:
It was discovered that the mod_copy module of ProFTPD, a FTP/SFTP/FTPS server, performed incomplete permission validation for the CPFR/CPTO commands (CVE-2019-12815).
It was discovered that due to incorrect handling of overly long commands, a remote unauthenticated user could trigger a denial-of-service by reaching an endless loop (CVE-2019-18217).