When curl < 7.84.0 does FTP transfers secured by krb5, it handles message verification failures wrongly. This flaw makes it possible for a Man-In-The-Middle attack to go unnoticed and even allows it to inject data to the client.
http://seclists.org/fulldisclosure/2022/Oct/28
http://seclists.org/fulldisclosure/2022/Oct/41
https://hackerone.com/reports/1590071
https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html
https://security.gentoo.org/glsa/202212-01
https://security.netapp.com/advisory/ntap-20220915-0003/