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asp-auditor.pl
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asp-auditor.pl
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#!/usr/bin/perl
my $VERSION="[ASP Auditor v2.2]";
# ASP Auditor [BETA]
# Author david.kierznowski_at_gmail.com
# http://michaeldaw.org
#
# purpose: Look for common misconfigurations and information leaks in
# ASP.NET applications.
#
# usage: Run with no arguments for usage instructions.
#
# Changelog:
# --v2.2-- 20/Apr/07
# * Added additional support for Anti-XSS Validation detection.
# * Added ASP Source Directory Leak Check
# * Added Apr/07 ASP.NET XSS Detection
#
# --v2.1-- 25/Sep/06
# * GET /Trace.axd often leaks ASP.NET version when other methods fail.
# * Fixed "?" bug in JavaScript Validate test
# * Added Version into usage()
#
# --v2.0-- 16/Sep/06
# * Version plugin allowing specific ASP.NET versioning.
# * Version brute force capabilities using JavaScript validate
# directories.
# * Check if global ASP.NET validate is being used.
# * Added brute force function and option in usage()
#
# This tool is based on H D Moore's Dot Net Application Scanner
# Author: H D Moore <hdm@digitaloffense.net>
# url: http://www.digitaloffense.net/index.html?section=TOOLS
#
# This script includes libwhisker v1.6
# libwhisker copyright 2000,2001,2002 rfp.labs
# see comments after "package LW" for full headers
#
$|++;
use FindBin qw{$Bin};
##
# use strict; # the embedded libwhisker breaks this :(
##
##( Initialize Variables
my (%hin, %hout, %jar, %options);
my (@sorted, @unsorted, $prevkey);
##( Parse Arguments
my $target = shift() || usage();
my $bf = shift();
if ($target !~ /(^http:\/\/|^https:\/\/)/)
{
print STDERR "[*] Please specify the complete URL (ex: http://www.site.int/)\n\n";
exit(0);
}
my @target_vals = LW::utils_split_uri($target);
if ($target_vals[1] !~ /(^http$|^https$)/)
{
print STDERR "[*] Only http and https URL's are supported.\n";
usage();
}
##( Create HIN
my $hin = ConfigureRequest (@target_vals);
$hin->{'Content-type'} = "application/x-www-form-urlencoded";
$hin->{'Accept-Charset'} = "iso-8859-1,*,utf-8";
$hin->{'Accept'} = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*";
$hin->{'Accept-Language'} = "en";
$hin->{'Referer'} = $target;
$hin->{'User-Agent'} = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.0.3705)";
##( Start Execution
# ASP Versions for use in fingerprint function
my %aspver = (
"1.0.2204.21" => "Version 1.0 Public Beta 1 Nov 2000 ",
"1.0.2914.16" => "Version 1.0 Public Beta 2 Jun 2001 ",
"1.0.3512.0" => "Version 1.0 Pre-release RC3 (Visual Studio.NET 2002 RC3)",
"1.0.3705.0" => "Version 1.0 RTM (Visual Studio.NET 2002) Feb 2002 ",
"1.0.3705.209" => "Version 1.0 SP1 Mar 2002 ",
"1.0.3705.288" => "Version 1.0 SP2 Aug 2002 ",
"1.0.3705.6018" => "Version 1.0 SP3 Aug 2004",
"1.1.4322.510" => "Version 1.1 Final Beta Oct 2002 ",
"1.1.4322.573" => "Version 1.1 RTM (Visual Studio.NET 2003 / Windows Server 2003) Feb 2003 ",
"1.1.4322.2032" => "Version 1.1 SP1 Aug 2004",
"1.1.4322.2300" => "Version 1.1 Post-SP1 (Windows Server 2003 SP1) Mar 2005",
"1.2.21213.-1" => "Version 1.2 (Whidbey pre-Alpha build) ",
"1.2.30703.27" => "Version 1.2 (Whidbey Alpha, PDC 2004) Nov 2003 ",
"2.0.40301.9" => "Version 2.0 (Whidbey CTP, WinHEC 2004) Mar 2004 ",
"2.0.40426.16" => "Version 2.0 (Whidbey CTP, TechEd US 2004) May 2004",
"2.0.40607.16" => "Version 2.0 (Visual Studio.NET 2005 Beta 1, TechEd Europe 2004) Jun 2004",
"2.0.40607.42" => "Version 2.0 (SQL Server Yukon Beta 2) Jul 2004",
"2.0.40607.85" => "Version 2.0 (Visual Studio.NET 2005 Beta 1, Team System Refresh) Aug 2004 ",
"2.0.40903.0" => "Version 2.0 (Whidbey CTP, Visual Studio Express) Oct 2004",
"2.0.41115.19" => "Version 2.0 (Visual Studio.NET 2005 Beta 1, Team System Refresh) Dec 2004",
"2.0.50110.28" => "Version 2.0 (Visual Studio.NET 2005 CTP, Professional Edition) Feb 2005",
"2.0.50215.44" => "Version 2.0 (Visual Studio.NET 2005 Beta 2, Visual Studio Express Beta 2) Apr 2005",
"2.0.50601.0" => "Version 2.0 (Visual Studio.NET 2005 CTP) Jun 2005",
"2.0.50215.322" => "Version 2.0 (Beta 2, WinFX) Sep 2005",
"2.0.50727.07" => "Version 2.0 (Visual Studio.NET 2005 CTP) Aug 2005",
"2.0.50727.26" => "Version 2.0 (Visual Studio.NET 2005 RC / SQL Server 2005 CTP) Sep 2005",
"2.0.50727.42" => "Version 2.0 RTM (Visual Studio.NET 2005 RTM / SQL Server 2005 RTM) Nov 2005",
);
# end of aspver hash
print STDERR "[*] Sending initial probe request...\n";
my $init_req = 0;
while ($init_req < 2)
{
# perform a normal GET request to the target URL
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
# process the response message
LW::cookie_read(\%jar, \%hout);
foreach my $c (keys(%jar))
{
if ($jar{$c}->[0] eq '')
{
# blank value, often this cookie is set to a null value on the
# login page of an asp.net app using Forms Authentication, so
# we should save this for future attacks
push @{$options{"AuthCookies"}}, $c;
print STDERR "[*] Possible authentication cookie: $c\n";
}
}
# look for the asp.net session handler cookie
if ($jar{"ASP.Net_Session"}) { $options{"Sessions"}++ }
# Save the asp.net version number if it is available
if ($hout{"X-AspNet-Version"}) { $options{"ADNVersion"} = $hout{"X-AspNet-Version"} }
# Save the server name while we are at it
if ($hout{"Server"}) { $options{"Server"} = $hout{"Server"} }
if ($hout{'whisker'}->{'data'} =~ m/\_\_VIEWSTATE\" value=\"([^\"]*)\" \/\>/)
{
my $VSR = LW::decode_base64($1);
$options{"ViewState"}++;
if ($VSR =~ m/^t<(.[0-9]{4,15});/) { $options{"VSPageID"} = $1 }
}
if ($hout{'whisker'}->{'code'} == 302 && $hout{'whisker'}->{'data'} =~ m/href=\'([^\']*)/)
{
my $loc = $1;
$hin->{'whisker'}->{'uri'} = $loc;
print STDERR "[*] Recieved a redirect response to $loc...\n";
if ($loc =~ m/\/\((.{1,32})\)\//)
{
$options{"CookielessSessions"}++;
$options{"CookielessSessionValue"} = $1;
}
# give it one more change to give us a real page
$init_req++;
} else {
# the first request was just fine, exit the loop
$init_req+=2;
}
}
# test the View State
if ($options{"ViewState"} && $options{"VSPageID"})
{
print STDERR "[*] Testing the View State...\n";
# send a request with an invalid (null key) ViewState
$hin->{'whisker'}->{'method'} = "POST";
$hin->{'whisker'}->{'data'} = '__VIEWSTATE=' . LW::encode_str2uri(LW::encode_base64("t<" . $options{"VSPageID"} . ";t<p<l<;>;l<187;>>;;>;>"));
SendRequest($hin, \%hout);
if ($hout{'whisker'}->{'code'} == 302)
{
$options{"CustomErrors"} = "On";
if ($hout{'whisker'}->{'data'} =~ m/href=\'(.*)\?aspxerrorpath=/)
{
$options{"ErrorHandler"} = $1;
}
}
if ($hout{'whisker'}->{'data'} =~ /viewable on remote machines/)
{
$options{"CustomErrors"} = "RemoteOnly";
}
if ($hout{'whisker'}->{'data'} =~ /the view.*state is invalid for this page/i)
{
$options{"CustomErrors"} = "Off";
$options{"ViewStateMac"} = "True";
}
# newer versions of asp.net do not allow the MAC to be disabled
if ($hout{'whisker'}->{'data'} =~ /key cannot be null or empty/i)
{
$options{"CustomErrors"} = "Off";
$options{"ViewStateMac"} = "False";
}
}
my $orig_uri = $hin->{'whisker'}->{'uri'};
# request a non-existent file and parse the error message
# the aspxerrorpath argument prevents us from being redirected
# and shows us the application name and directory for the url
# some systems also disclose the drive path in HTML comments (stack trace)
print STDERR "[*] Sending path discovery request...\n";
my $fake_uri = $orig_uri;
my $fake_asp = "FAQ$$.aspx";
if ($fake_uri =~ m/(.*)\//) { $fake_uri = $1 }
$fake_uri .= "/$fake_asp?aspxerrorpath=/";
$hin->{'whisker'}->{'uri'} = $fake_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
if ($hout{'whisker'}->{'data'} =~ m/Server Error in \'(.*)\' Application/) { $options{"Application"} = $1 }
if ($hout{'whisker'}->{'data'} =~ m/FileNotFoundException.*([A-Z]:.*)\\$fake_asp/i) { $options{"FilePath"} = $1 }
# this version is more granular than the one provided by the http header
if ($hout{'whisker'}->{'data'} =~ m/ASP.NET Version:([0-9].*)/) { $options{"ADNVersion"} = $1 }
# Requesting <script>...</script> will cause .NET validate to cry
# if enabled.
print STDERR "[*] Sending ASP.NET validate discovery request...\n";
my $fake_uri = $orig_uri;
# This is not really required.
#my $fake_asp = "FAQ$$.aspx?<script>FAQ$$</script>";
my $fake_asp = "?<script>alert(1)</script>";
if ($fake_uri =~ m/(.*)\//) { $fake_uri = $1 }
$fake_uri .= "/$fake_asp";
$hin->{'whisker'}->{'uri'} = $fake_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
if ($hout{'whisker'}->{'data'} =~ m/for security reasons|A potentially dangerous/) { $options{"ASPValidate"} = "ASP.NET Anti-XSS Library Enabled." }
if ($hout{'whisker'}->{'data'} =~ m/(c:\\windows.*)\<b/i) { $options{"ASPDirLeak"} = "Source File Dir Leak: $1" }
print STDERR "[*] Sending ASP.NET Apr/07 XSS Check\n";
my $fake_uri = $orig_uri;
my $fake_asp = "?<//STYLE=x:e/**/xpression(alert('asp-audit'))>";
if ($fake_uri =~ m/(.*)\//) { $fake_uri = $1 }
$fake_uri .= "/$fake_asp";
#print $fake_uri;
$hin->{'whisker'}->{'uri'} = $fake_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
# Not testing a great deal.
# we send: <//STYLE=x:e/**/xpression(alert('asp-audit'))>
if ($hout{'whisker'}->{'data'} =~ m/\<\/\/STYLE=x.*asp-audit/) {
$options{"ASPXSSBypass1"} = "ASP XSS Bypass 1 Successful (http://michaeldaw.org/news/news-030407/)" }
# determine if tracing is enabled by sending a request for
# trace.axd in the application root and parsing the response.
print STDERR "[*] Sending application trace request...\n";
if (! $options{"Application"})
{
$fake_uri = $orig_uri;
if ($fake_uri =~ m/(.*)\//) { $fake_uri = $1 }
$fake_uri .= "/trace.axd";
} else {
$fake_uri = $options{"Application"} . "/trace.axd";
if ($options{"CookielessSessions"})
{
$fake_uri = "/(" . $options{"CookielessSessionValue"} . ")$fake_uri";
}
}
$fake_uri =~ s/\/\//\//;
$hin->{'whisker'}->{'uri'} = $fake_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
if ($hout{'whisker'}->{'data'} =~ m/Server Error in \'(.*)\' Application/) { $options{"Application"} = $1 }
if ($hout{'whisker'}->{'data'} =~ /viewable on remote machines/) { $options{"AppTrace"} = "LocalOnly" }
if ($hout{'whisker'}->{'data'} =~ /Application Trace/) { $options{"AppTrace"} = "Enabled" }
# DK: Added 25/Sep/06. Grab ADN Version if its available - this often works when other tests fail.
if (! $options{"ADNVersion"} && $hout{"X-AspNet-Version"}) { $options{"ADNVersion"} = $hout{"X-AspNet-Version"} }
if ($hout{'whisker'}->{'data'} =~ m/ASP.NET Version:([0-9].*)/) { $options{"ADNVersion"} = $1 }
# request a .REM extension with a file name consisting of
# the DOS 'NUL' special device name and parse the response
if ((! $options{"CustomErrors"} || ! $options{"ADNVersion"}) )
{
print STDERR "[*] Sending null remoter service request...\n";
if (! $options{"Application"})
{
$fake_uri = $orig_uri;
if ($fake_uri =~ m/(.*)\//) { $fake_uri = $1 }
$fake_uri .= "/NUL.REM";
} else {
$fake_uri = $options{"Application"} . "/NUL.REM";
if ($options{"CookielessSessions"})
{
$fake_uri = "/(" . $options{"CookielessSessionValue"} . ")$fake_uri";
}
}
$fake_uri =~ s/\/\//\//;
$hin->{'whisker'}->{'uri'} = $fake_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
# <= windows 2000
if ($hout{'whisker'}->{'data'} =~ m/be viewed by browsers running on the local server/i) { $options{"CustomErrors"} = "On" }
# >= windows 2003
if ($hout{'whisker'}->{'data'} =~ m/get more info turn on customErrors/i) { $options{"CustomErrors"} = "On" }
# <= windows 2000 customErrors=Off
if ($hout{'whisker'}->{'data'} =~ m/invalid file name for monitoring/i) { $options{"CustomErrors"} = "Off" }
if ($hout{'whisker'}->{'data'} =~ m/System.ArgumentNullException/i) { $options{"CustomErrors"} = "Off" }
#if ($hout{'whisker'}->{'data'} =~ m/No receiver registered/i) { $options{"CustomErrors"} = "Unknown" }
# Save the asp.net version number if it is available
if (! $options{"ADNVersion"} && $hout{"X-AspNet-Version"}) { $options{"ADNVersion"} = $hout{"X-AspNet-Version"} }
if ($hout{'whisker'}->{'data'} =~ m/ASP.NET Version:([0-9].*)/) { $options{"ADNVersion"} = $1 }
# print $hout{'whisker'}->{'data'};
}
# generate the report
print "\n[ .NET Configuration Analysis ]\n\n";
foreach (keys(%options))
{
print " " . (" " x (13 - length($_))) . $_ . "\t-> " . $options{$_} . "\n";
}
# Match ADNVersion with aspver hash
if ($options{"ADNVersion"}) {
# Credits to MacGyveR (macgyver@thedumbterminal.co.uk) for multi-platform chomp.
# This confuzzled me for almost an hour.
$options{"ADNVersion"} =~ s/\n|\r$//g;
my $ADN = $options{"ADNVersion"};
print "\n";
while ( my ($version, $data) = each(%aspver) )
{
# print $version . " " . $ADN . "\n";
if ($version =~ /$ADN/)
{
print "\tmatches\t-> $version $data\n";
}
}
}
print "\n";
if ($bf =~ /-bf/) {
# JavaScript validate brute force version check.
print STDERR "[*] Sending brute force discovery requests...\n";
# Get rid of duplicate asp vers
while ( my ($key, $value) = each(%aspver) )
{
if ($key =~ /(\d)\.(\d)\.(\d+)/)
{
my $key = $1 . $2 . $3;
push (@unsorted, $key);
push (@unsorted, "\n");
}
}
foreach my $key (sort { $a <=> $b } @unsorted)
{
push (@sorted, $key . "\n") unless ($key =~ /$prevkey/);
$prevkey = $key;
}
# print @sorted;
foreach my $line (@sorted) {
if ($line =~ /(\d)(\d)(\d+)/)
{
my $newver = $1 . "_" . $2 . "_" . $3;
my $bf_uri = $orig_uri;
if ($bf_uri =~ m/(.*)\//) { $bf_uri = $1 }
$bf_uri .= "/aspnet_client/system_web/$newver";
$hin->{'whisker'}->{'uri'} = $bf_uri;
$hin->{'whisker'}->{'method'} = "GET";
SendRequest($hin, \%hout);
$hin->{'whisker'}->{'uri'} = $orig_uri;
if ($hout{'whisker'}->{'data'} =~ /Virtual Directory|has moved (.*)\d{1}.\d{1}.\d+/) { $options{"JSValidate"} = "1" } else { $options{"JSValidate"} = 0}
# print $hout{'whisker'}->{'data'};
$newver =~ s/\_/\./g;
# print $options{"JSValidate"} . "\n";
print "\tFound -> $bf_uri \n" if ($options{"JSValidate"} =~ /1/);
}
}
}
# disconnect the session
LW::http_reset();
##( All Done, Exit
exit(0);
##( Begin Subroutines
#
#
sub usage
{
print "\n$VERSION\n";
print "Usage: $0 [http://target/app/file.aspx] (opts)
(opts)
-bf brute force ASP.NET version using JS Validate
directories.\n\n";
exit(1);
}
sub CheckLW {
# require libwhisker-1.6 or newer
if ($LW::VERSION =~ /^(0|1\.[0-5]$)/) {
print STDERR "Error: Please upgrade to libwhisker 1.6 or newer.\n";
exit(1);
}
}
sub SendRequest {
my ($hin, $hout) = @_;
LW::http_fixup_request($hin);
if (LW::http_do_request($hin,$hout)) {
print 'ERROR: ', $hout{'whisker'}->{'error'}, "\n";
print $hout{'whisker'}->{'data'}, "\n";
exit(0);
} else {
return $hout;
}
}
sub ConfigureRequest {
my @target_vals = @_;
my %hin = ();
my $hin = \%hin;
LW::http_init_request($hin);
##( Set the URI
$hin{'whisker'}->{'uri'} = $target_vals[0];
##( Set the Host
$hin{'whisker'}->{'host'} = $target_vals[2];
##( Set the Port
$hin{'whisker'}->{'port'} = $target_vals[3];
##( Configure SSL and Default Port
if ($target_vals[1] eq "https")
{
$hin{'whisker'}->{'ssl'} = 1;
$hin{'whisker'}->{'save_ssl_info'} = 1;
if ( ($target_vals[3] + 0 ) == 0) { $hin{'whisker'}->{'port'} = 443; }
} else {
if ( ($target_vals[3] + 0 ) == 0) { $hin{'whisker'}->{'port'} = 80; }
}
##( Configure HTTP Authentication
if ($target_vals[6] && $target_vals[7])
{
LW::auth_set_header('basic', \%hin, $target_vals[6], $target_vals[7]);
}
return $hin;
}
# libwhisker v1.6
# libwhisker is a collection of routines used by whisker
#
# libwhisker copyright 2000,2001,2002 rfp.labs
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
#
# More information can be found at http://www.wiretrip.net/rfp/
# Libwhisker mailing list and resources are also available at
# http://sourceforge.net/projects/whisker/
#
package LW;
use 5.004;
$LW::VERSION = "1.6";
####### external module tests ###################################
BEGIN
{
## LW module manager stuff ##
%LW::available = ();
$LW::LW_HAS_SOCKET = 0;
$LW::LW_HAS_SSL = 0;
$LW::LW_SSL_LIB = 0;
$LW::LW_NONBLOCK_CONNECT = 0;
## binary helper - may contain functions substituted further down ##
eval "use LW::bin"; # do we have libwhisker binary helpers?
if ($@) { $LW::available{'LW::bin'} = $LW::bin::VERSION; }
## encode subpackage ##
eval "require MIME::Base64";
if ($@)
{
*encode_base64 = \&encode_base64_perl;
*decode_base64 = \&decode_base64_perl;
}
else
{
# MIME::Base64 typically has faster C versions
$LW::available{'mime::base64'} = $MIME::Base64::VERSION;
*encode_base64 = \&MIME::Base64::encode_base64;
*decode_base64 = \&MIME::Base64::decode_base64;
}
## md5 subpackage ##
eval "require MD5";
if ( !$@ ) { $LW::available{'md5'} = $MD5::VERSION; }
## http subpackage ##
eval "use Socket"; # do we have socket support?
if ($@) { $LW::LW_HAS_SOCKET = 0; }
else
{
$LW::LW_HAS_SOCKET = 1;
$LW::available{'socket'} = $Socket::VERSION;
}
if ($LW::LW_HAS_SOCKET)
{
eval "use Net::SSLeay"; # do we have SSL support?
if ($@) { $LW::LW_HAS_SSL = 0; }
else
{
$LW::LW_HAS_SSL = 1;
$LW::LW_SSL_LIB = 1;
$LW::available{'net::ssleay'} = $Net::SSLeay::VERSION;
Net::SSLeay::load_error_strings();
Net::SSLeay::SSLeay_add_ssl_algorithms();
Net::SSLeay::randomize();
}
if ( !$LW::LW_HAS_SSL )
{
eval "use Net::SSL"; # different SSL lib
if ($@) { $LW::LW_HAS_SSL = 0; }
else
{
$LW::LW_HAS_SSL = 1;
$LW::LW_SSL_LIB = 2;
$LW::available{'net::ssl'} = $Net::SSL::VERSION;
}
}
## non-blocking IO ##
if ( $^O !~ /Win32/ )
{
eval "use POSIX qw(:errno_h :fcntl_h)"; # better
if ( !$@ )
{
$LW::LW_NONBLOCK_CONNECT = 1;
}
}
} # if($LW_HAS_SOCKET)
} # BEGIN
####### package variables #######################################
## crawl subpackage ##
%LW::crawl_config = (
'save_cookies' => 0,
'reuse_cookies' => 1,
'save_offsites' => 0,
'follow_moves' => 1,
'url_limit' => 1000,
'use_params' => 0,
'params_double_record' => 0,
'skip_ext' => '.gif .jpg .gz .mp3 .swf .zip ',
'save_skipped' => 0,
'save_referrers' => 0,
'do_head' => 0,
'callback' => 0,
'slashdot_bug' => 1,
'normalize_uri' => 1,
'source_callback' => 0
);
@LW::crawl_urls = ();
%LW::crawl_server_tags = ();
%LW::crawl_referrers = ();
%LW::crawl_offsites = ();
%LW::crawl_cookies = ();
%LW::crawl_forms = ();
%LW::crawl_temp = ();
# this idea/structure was taken from HTML::LinkExtor.pm,
# copyright 2000 Gisle Aas and Michael A. Chase
%LW::crawl_linktags = (
'a' => 'href',
'applet' => [qw(codebase archive code)],
'area' => 'href',
'base' => 'href',
'bgsound' => 'src',
'blockquote' => 'cite',
'body' => 'background',
'del' => 'cite',
'embed' => [qw(src pluginspage)],
'form' => 'action',
'frame' => [qw(src longdesc)],
'iframe' => [qw(src longdesc)],
'ilayer' => 'background',
'img' => [qw(src lowsrc longdesc usemap)],
'input' => [qw(src usemap)],
'ins' => 'cite',
'isindex' => 'action',
'head' => 'profile',
'layer' => [qw(background src)],
'link' => 'href',
'object' => [qw(codebase data archive usemap)],
'q' => 'cite',
'script' => 'src',
'table' => 'background',
'td' => 'background',
'th' => 'background',
'xmp' => 'href',
);
## forms subpackage ##
@LW::forms_found = ();
%LW::forms_current = ();
## http subpackage ##
my $SOCKSTATE = 0;
my $TIMEOUT = 10; # default
my ( $STATS_REQS, $STATS_SYNS ) = ( 0, 0 );
my ( $LAST_HOST, $LAST_INET_ATON, $LAST_SSL ) = ( '', '', 0 );
my ( $OUTGOING_QUEUE, $INCOMING_QUEUE ) = ( '', '' );
my ( $SSL_CTX, $SSL_THINGY );
my %http_host_cache = ();
# order is following:
# [0] - SOCKET
# [1] - $SOCKSTATE
# [2] - INET_ATON
# [3] - $SSL_CTX
# [4] - $SSL_THINGY
# [5] - $OUTGOING_QUEUE
# [6] - $INCOMING_QUEUE
# [7] - $STATS_SYNS
# [8] - $STATS_REQS
my $Z; # array ref to current host specs
=pod
=head1 ++ Sub package: anti-ids
The anti-ids sub package implements management routines for various
rewriting/encoding in order to evade intrusion detection systems.
=cut
########################################################################
=pod
=head1 - Function: LW::anti_ids
Params: \%hin, $modes
Return: nothing
LW::anti_ids computes the proper anti-ids encoding/tricks specified by
$modes, and sets up %hin in order to use those tricks. Valid modes
are (the mode numbers are the same as those found in whisker 1.4):
1 - Encode some of the characters via normal URL encoding
2 - Insert directory self-references (/./)
3 - Premature URL ending (make it appear the request line is done)
4 - Prepend a long random string in the form of "/string/../URL"
5 - Add a fake URL parameter
6 - Use a tab instead of a space as a request spacer
7 - Change the case of the URL around (works against Windows and Novell)
8 - Change normal seperators ('/') to Windows version ('\')
9 - Session splicing (sending data in multiple packets)
You can set multiple modes by setting the string to contain all the modes
desired; i.e. $modes="146" will use modes 1, 4, and 6.
=cut
sub anti_ids
{
my ( $rhin, $modes ) = ( shift, shift );
my ( @T, $x, $c, $s, $y );
my $ENCODED = 0;
my $W = $$rhin{'whisker'};
return if ( !( defined $rhin && ref($rhin) ) );
# in case they didn't do it already
$$rhin{'whisker'}->{'uri_orig'} = $$rhin{'whisker'}->{'uri'};
# note: order is important!
# mode 9 - session splicing
if ( $modes =~ /9/ )
{
$$rhin{'whisker'}->{'ids_session_splice'} = 1;
}
# mode 4 - prepend long random string
if ( $modes =~ /4/ )
{
$s = '';
if ( $$W{'uri'} =~ m#^/# )
{
$y = &utils_randstr;
$s .= $y while ( length($s) < 512 );
$$W{'uri'} = "/$s/.." . $$W{'uri'};
}
}
# mode 7 - (windows) random case sensitivity
if ( $modes =~ /7/ )
{
@T = split( //, $$W{'uri'} );
for ( $x = 0 ; $x < ( scalar @T ) ; $x++ )
{
if ( ( rand() * 2 ) % 2 == 1 )
{
$T[$x] = uc( $T[$x] );
}
}
$$W{'uri'} = join( '', @T );
}
# mode 2 - directory self-reference (/./)
if ( $modes =~ /2/ )
{
$$W{'uri'} =~ s#/#/./#g;
}
# mode 8 - windows directory separator (\)
if ( $modes =~ /8/ )
{
$$W{'uri'} =~ s#/#\\#g;
$$W{'uri'} =~ s#^\\#/#;
$$W{'uri'} =~ s#^(http|file|ftp|nntp|news|telnet):\\#$1://#;
$$W{'uri'} =~ s#\\$#/#;
}
# mode 1 - random URI (non-UTF8) encoding
if ( $modes =~ /1/ )
{
if ( $ENCODED == 0 )
{
$$W{'uri'} = encode_str2ruri( $$W{'uri'} );
$ENCODED = 1;
}
}
# mode 5 - fake parameter
if ( $modes =~ /5/ )
{
( $s, $y ) = ( &utils_randstr, &utils_randstr );
$$W{'uri'} = "/$s.html%3f$y=/../$$W{'uri'}";
}
# mode 3 - premature URL ending
if ( $modes =~ /3/ )
{
$s = &utils_randstr;
$$W{'uri'} = "/%20HTTP/1.1%0D%0A%Accept%3A%20$s/../..$$W{'uri'}";
}
# mode 6 - TAB as request spacer
if ( $modes =~ /6/ )
{
$$W{'req_spacer'} = "\t";
}
} # end anti_ids
=pod
=head1 ++ Sub package: auth
The auth sub package implements HTTP authentication routines.
=cut
########################################################################
=pod
=head1 - Function: LW::auth_brute_force
Params: $auth_method, \%hin, $user, \@passwords [, $domain]
Return: $first_valid_password, undef if error/none found
Perform a HTTP authentication brute force against a server (host and URI
defined in %hin). It will try every password in the password array for
the given user. The first password (in conjunction with the given user)
that doesn't return HTTP 401 is returned (and the brute force is stopped
at that point). $domain is optional, and is only used for NTLM auth.
=cut
sub auth_brute_force
{
my ( $auth_method, $hrin, $user, $pwordref, $dom ) = @_;
my ( $P, %hout );
return undef if ( !defined $auth_method || length($auth_method) == 0 );
return undef if ( !defined $user || length($user) == 0 );
return undef if ( !( defined $hrin && ref($hrin) ) );
return undef if ( !( defined $pwordref && ref($pwordref) ) );
map {
( $P = $_ ) =~ tr/\r\n//d;
auth_set_header( $auth_method, $hrin, $user, $P, $dom );
return undef if ( http_do_request( $hrin, \%hout ) );
return $P if ( $hout{'whisker'}->{'http_resp'} ne 401 );
} @$pwordref;
return undef;
}
########################################################################
=pod
=head1 - Function: LW::auth_set_header
Params: $auth_method, \%hin, $user, $password [, $domain]
Return: nothing (modifies %hin)
Set the appropriate authentication header in %hin.
NOTE: right now only BASIC and NTLM are supported.
=cut
sub auth_set_header
{
my ( $method, $href, $user, $pass, $domain ) = ( lc(shift), @_ );
return if ( !( defined $href && ref($href) ) );
return if ( !defined $user || !defined $pass );
if ( $method eq 'basic' )
{
$$href{'Authorization'} =
'Basic ' . encode_base64( $user . ':' . $pass, '' );
}
if ( $method eq 'proxy-basic' )
{
$$href{'Proxy-Authorization'} =
'Basic ' . encode_base64( $user . ':' . $pass, '' );
}
if ( $method eq 'ntlm' )
{
my $o = ntlm_new( $user, $pass, $domain );
$$href{'whisker'}->{'ntlm_obj'} = $o;
$$href{'whisker'}->{'ntlm_step'} = 0;
$$href{'Authorization'} = 'NTLM ' . ntlm_client($o);
}
}
########################################################################
=pod
=head1 - Function: LW::do_auth
Params: $auth_method, \%hin, $user, $password [, $domain]
Return: nothing (modifies %hin)
This is an alias for auth_set_header().
=cut
sub do_auth
{
goto &auth_set_header;
}
=pod
=head1 ++ Sub package: bruteurl
The bruteurl sub package is used to perform a brute-force of HTTP
requests on an array of string components.
=cut
=pod
=head1 - Function: LW::bruteurl
Params: \%hin, $pre, $post, \@values_in, \@values_out
Return: Nothing (adds to @out)