This update for proftpd fixes the following issues:

proftpd was updated to version 1.3.6c.

Security issues fixed:

- CVE-2020-9272: Fixed an out-of-bounds read in mod_cap (bsc#1164572).
- CVE-2020-9273: Fixed a potential memory corruption caused by an interruption of the data transfer channel (bsc#1164574).