An arbitrary file copy vulnerability in mod_copy in ProFTPD up to 1.3.5b allows for remote code execution and information disclosure without authentication, a related issue to CVE-2015-3306.
https://www.debian.org/security/2019/dsa-4491
https://tbspace.de/cve201912815proftpd.html
https://security.gentoo.org/glsa/201908-16
https://seclists.org/bugtraq/2019/Aug/3
https://lists.debian.org/debian-lts-announce/2019/08/msg00006.html
https://github.com/proftpd/proftpd/pull/816
https://cert-portal.siemens.com/productcert/pdf/ssa-940889.pdf
http://www.securityfocus.com/bid/109339
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00004.html