Module: Msf::Exploit::Java

Defined in:
lib/msf/core/exploit/java.rb

Instance Method Summary collapse

Instance Method Details

#build_jar(output_jar, in_files) ⇒ Object 


132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'lib/msf/core/exploit/java.rb', line 132

def build_jar(output_jar, in_files)
  if output_jar.class != "".class || in_files.class != [].class
    raise RuntimeError, "Building a jar requires an output_jar and an Array of in_files."
  end

  # Add paths
  in_files	= in_files.map { |file| File.join(datastore['JavaCache'], file) }

  create_jar_klass = Rjb::import('javaCompile.CreateJarFile')
  file_class	 = Rjb::import('java.io.File')

  file_out_jar	= file_class.new_with_sig('Ljava.lang.String;', File.join(datastore['JavaCache'], output_jar) )
  files_in	= Array.new

  in_files.each { |file| files_in << file_class.new_with_sig('Ljava.lang.String;', file) }
  create_jar_klass._invoke('createJarArchive', 'Ljava.io.File;[Ljava.io.File;', file_out_jar, files_in)
end

#compile(classnames, codez, compile_options = nil) ⇒ Object 


88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
 
# File 'lib/msf/core/exploit/java.rb', line 88

def compile(classnames, codez, compile_options=nil)
  if !@rjb_loaded or !@jvm_init
    raise RuntimeError, "Could not load rjb and/or the JVM: " + @java_error.to_s
  end

  if !compile_options.is_a?(Array) && compile_options
    raise RuntimeError, "Compiler options must be of type Array."
  end

  compile_options = [] if compile_options.nil?

  # Create the directory if it doesn't exist
  Dir.mkdir(datastore['JavaCache']) if !File.exist? datastore['JavaCache']

  # For compatibility, some exploits need to have the target and source version
  # set to a previous JRE version.
  std_compiler_opts = [ "-target", "1.3", "-source", "1.3", "-d", datastore['JavaCache'] ]

  compile_options += std_compiler_opts

  java_compiler_klass = Rjb::import('javaCompile.CompileSourceInMemory')

  # If we were passed arrays
  if classnames.class == [].class && codez.class == [].class
    # default compile class
    begin
    # Same as java_compiler_klass.CompileFromMemory(	String[] classnames,
    #						String[] codez, String[] compilerOptions)
      success = java_compiler_klass._invoke('CompileFromMemory',
        # Signature explained: [ means array, Lpath.to.object; means object
        # Thus, this reads as call the method with 3 String[] args.
        '[Ljava.lang.String;[Ljava.lang.String;[Ljava.lang.String;',
        classnames, codez, compile_options)
    rescue Exception => e
      print_error "Received unknown error: " + e
    end
  else
    raise RuntimeError, "The Java mixin received unknown argument-type combinations and cannot continue."
  end
  if !success
    raise RuntimeError, "Compile failed."
  end
end

#init_jvm(jvmoptions = nil) ⇒ Object 


45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/msf/core/exploit/java.rb', line 45

def init_jvm(jvmoptions = nil)
  if (not ENV['JAVA_HOME'])
    raise RuntimeError, 'JAVA_HOME is not set'
  end

  toolsjar = File.join(ENV['JAVA_HOME'], "lib", "tools.jar")
  if (not File.exist? toolsjar)
    raise RuntimeError, 'JAVA_HOME does not point to a valid JDK installation.'
  end

  # Instantiate the JVM with a classpath pointing to the JDK tools.jar
  # and our javatoolkit jar.
  classpath  = File.join(Msf::Config.data_directory, "exploits", "msfJavaToolkit.jar")
  classpath += ":" + toolsjar
  classpath += ":" + datastore['ADDCLASSPATH'] if datastore['ADDCLASSPATH']

  Rjb::load(classpath, jvmargs=[])

  @jvm_init = true
end

#initialize(info = {}) ⇒ Object 


24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/msf/core/exploit/java.rb', line 24

def initialize(info = {})
  super

  register_advanced_options(
    [
      OptString.new( 'JavaCache', 	[true, 'Java cache location',
        File.join(Msf::Config.config_directory, "javacache")]),
      OptString.new( 'AddClassPath', 	[false, 'Additional java classpath', nil]),
    ], self.class)

  begin
    require 'rjb'
    @rjb_loaded = true
    init_jvm
  rescue ::Exception => e
    @rjb_loaded = false
    @jvm_init   = false
    @java_error  = e
  end
end

#query_jvm ⇒ Object 


66
67
68
 
# File 'lib/msf/core/exploit/java.rb', line 66

def query_jvm
  return @jvmInit
end

#save_to_file(classnames, codez, location) ⇒ Object 


70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
 
# File 'lib/msf/core/exploit/java.rb', line 70

def save_to_file(classnames, codez, location)
  path = File.join( Msf::Config.install_root, "external", "source", location )

  if not File.exist? path
    Dir.mkdir(path)
  end

  i = 0
  classnames.each { |fil|
    file = File.join( path, fil + ".java")
    fp   = File.open( file, "wb" )
    print_status "Writing #{fil} to " + file
    fp.puts codez[i]
    i += 1
    fp.close
  }
end

#sign_jar(cert_cn, unsiged_jar, signed_jar, cert_alias = "signFiles", msf_keystore = "msfkeystore", msf_store_pass = "msfstorepass", msf_key_pass = "msfkeypass") ⇒ Object

www.defcon.org/images/defcon-17/dc-17-presentations/defcon-17-valsmith-metaphish.pdf


153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
 
# File 'lib/msf/core/exploit/java.rb', line 153

def sign_jar(cert_cn, unsiged_jar, signed_jar, cert_alias="signFiles", msf_keystore="msfkeystore",
    msf_store_pass="msfstorepass", msf_key_pass="msfkeypass")

  # Dependent on $JAVA_HOME/lib/tools.jar that comes with the JDK.
  signer_klass 	= Rjb::import('javaCompile.SignJar')

  # Check if the keystore exists from previous run.  If it does, delete it.
  msf_keystore	= File.join(datastore['JavaCache'], msf_keystore)
  File.delete msf_keystore if File.exist? msf_keystore

  # Rjb pukes on a CN with a comma in it so bad that it crashes to shell
  # and turns input echoing off.  Simple fix for this ugly bug is
  # just to get rid of commas which kinda sucks but whatever.  See #1543.
  keytool_opts	= [
    "-genkey", "-alias", cert_alias, "-keystore", msf_keystore,
    "-storepass", msf_store_pass, "-dname", "CN=#{cert_cn.gsub(",",'')}",
    "-keypass", "msfkeypass"
  ]

  # Build the cert keystore
  signer_klass._invoke('KeyToolMSF','[Ljava.lang.String;',keytool_opts)

  jarsigner_opts	= [
    "-keystore", msf_keystore, "-storepass", msf_store_pass,
    "-keypass", msf_key_pass, "-signedJar",
    File.join(datastore['JavaCache'], signed_jar), 	 # Signed Jar
    File.join(datastore['JavaCache'], unsiged_jar),  # Input Jar we're signing
    cert_alias  # The cert we're using
  ]
  signer_klass._invoke('JarSignerMSF','[Ljava.lang.String;',jarsigner_opts)

  # There are warnings in the source for KeyTool/JarSigner warning that security providers
  # are not released, and if you are calling .main(foo) from another app, you need to release
  # them manually.  This is not done here, and should Rjb be used for anything in the future,
  # this may need to be cleaned up.
end