How to block ruby exec commands

Question

Does anybody know how to block/disable ruby exec commands? There are three commands that execute shell commands in ruby: exec, system, and %x() or ``. I want to block/disable these commands.

Answer 1

Try this out:

module Kernel
  remove_method :exec
  remove_method :system
  remove_method :`
end

It reopens the Kernel module and and remove the exec and system methods.