From: "postmodern (Hal Brodigan)" <postmodern.mod3@...>
Date: 2012-05-08T09:37:39+09:00
Subject: [ruby-core:44929] [ruby-trunk - Bug #6409][Open] public_send is easily bypassed


Issue #6409 has been reported by postmodern (Hal Brodigan).

----------------------------------------
Bug #6409: public_send is easily bypassed
https://bugs.ruby-lang.org/issues/6409

Author: postmodern (Hal Brodigan)
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-05-08 trunk 35584) [x86_64-linux]


=begin
(({public_send})) can easily be bypassed, by using it to call (({send})). (({public_send})) should explicitly not allow calling (({send})).

    class Test
      private

      def secret
        "top secret"
      end
    end

    t = Test.new

    t.public_send(:secret)
    # => NoMethodError: private method `secret' called for #<Test:0x0000000159b950>

    t.public_send(:send, :secret)
    # => "top secret"

    t.public_send(:send, :exec, "rm -rf ~")
=end


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