Preface: Quite a number of people think that Mainframe computer no longer exist anymore. However they are still alive.

Background: A 3270 Emulator is a terminal emulator that duplicates the functions of an IBM 3270 mainframe computer terminal on a PC or similar microcomputer.

Vulnerability details: There is Missing SSL Certificate Validation in the pw3270 terminal emulator before version 5.1.

Impact: TLS/SSL certificate validation flaw, leading to attackers in a MitM position being able to affect confidentiality, integrity and availability of traffic between the client and host, including credentials used.

Remedy: Upgrade to version 5.1. For more information, please visit the following URL – https://pkgs.org/download/pw3270