netkit telnetd is a server implementation of the Telnet protocol which comes with many Linux and Unix operating systems.
An unbounded read and write condition in the
**nextitem** function allows remote attackers to execute arbitrary commands on the server.
Apply a fix from the operating system vendor when available or disable the Telnet service.
Exploit works on Fedora 31 netkit-telnet-0.17 with SELinux disabled.