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#VERSION,2.03
# $Id: nikto_auth.plugin 632 2011-02-19 02:49:31Z sullo $
###############################################################################
# Copyright (C) 2004 CIRT, Inc.
#
# 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; version 2
# of the License only.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
###############################################################################
# PURPOSE:
# Search content for known bad strings
###############################################################################
sub nikto_auth_init {
my $id = { name => 'auth',
full_name => 'Guess authentication',
author => 'Sullo/Deity',
description => 'Attempt to guess authentication realms',
hooks => {
start => { method => \&nikto_auth_load,
weight => 1,
},
postfetch => { method => \&nikto_auth,
weight => 19,
cond => '$result->{whisker}->{code} eq 401',
},
prefetch => { method => \&nikto_auth_pre,
weight => 19,
},
},
copyright => "2010 CIRT Inc"
};
use vars qw/$REALMS/;
return $id;
}
# Load up the database as soon as we can
sub nikto_auth_load {
$REALMS = init_db("db_realms");
if (defined $CLI{'hostauth'}) {
my @x = split(/:/, $CLI{'hostauth'});
my $HOSTAUTH = { nikto_id => "700500",
realm => (defined $x[2]) ? $x[2] : '@ANY',
password => $x[1],
id => $x[0],
message => "Credentials provided by CLI.",
};
unshift(@{$REALMS}, $HOSTAUTH);
}
}
# Prefetch method can only set a default if it exists, since we don't have
# any returned 401 header. This may mean we send auth headers when they are not
# required, but it shouldn't matter. It also means if there are multiple realms
# the postfetch method will keep changing default...
sub nikto_auth_pre {
my ($mark, $parameters, $request, $result) = @_;
if ($mark->{'realms'}{'default'}{'authtype'} ne '') {
LW2::auth_set($mark->{'realms'}{'default'}{'authtype'},
$request,
$mark->{'realms'}{'default'}{'id'},
$mark->{'realms'}{'default'}{'password'});
$request->{'whisker'}->{'allow_short_reads'} = 1;
LW2::http_fixup_request($request);
}
return $request, $result;
}
# Split up www-authenticate to realm and method
sub split_auth_header {
my $header = $_[0] || return;
my ($realm, $authtype);
my @authenticate = split(/=/, $header);
if ($authenticate[0] =~ /^ntlm/i) {
$realm = $authtype = 'NTLM';
}
else {
$realm = $authenticate[1];
$realm =~ s/^\"//;
$realm =~ s/\".*$//;
if ($authenticate[0] =~ /^basic/i) {
$authtype = 'basic';
}
elsif ($authenticate[0] =~ /^digest/i) {
$authtype = 'digest';
}
}
return $realm, $authtype;
}
# Actual authentication and retry takes place here.
# User-supplied credentials will be tried first if present
sub nikto_auth {
my ($mark, $parameters, $request, $result) = @_;
my ($authtype) = 'basic';
my ($body) = $result->{'whisker'}->{'data'};
my ($uri) = $result->{'whisker'}->{'uri'};
my ($method) = $result->{'whisker'}->{'method'} || "GET";
my ($realm, $save_auth);
unless (defined $result->{'www-authenticate'}) {
nprint("+ ERROR: No authentication header defined: $uri");
return $request, $result;
}
my ($realm, $authtype) = split_auth_header($result->{'www-authenticate'});
# did we already test this realm?
if (exists $mark->{'realms'}{$realm}{'status'}) {
return $request, $result;
}
# Save to revert
$save_auth = $result{'www-authenticate'};
nprint("+ $uri - Requires Authentication for realm '$realm'")
if ($OUTPUT{'show_auth'} || $uri =~ /^$CLI{'root'}\/?$/);
# Now we have this we can try guessing the password
foreach my $entry (@{$REALMS}) {
return if $mark->{'terminate'};
unless ($realm =~ /$entry->{'realm'}/i || $entry->{'realm'} eq '@ANY') { next; }
if ($result->{'www-authenticate'} =~ /^ntlm/i) {
$authtype = 'ntlm';
}
# Set up LW hash
LW2::auth_set($authtype, $request, $entry->{'id'}, $entry->{'password'});
# Patch to fix short reads
$request->{'whisker'}->{'allow_short_reads'} = 1;
LW2::http_fixup_request($request);
sleeper();
LW2::http_do_request_timeout($request, $result); # test auth
$COUNTERS{'totalrequests'}++;
dump_var("Auth Request", $request);
dump_var("Auth Response", $result);
$mark->{'realms'}{$realm}{'status'} = 0;
$mark->{'realms'}{$realm}{'id'} = $entry->{'id'};
$mark->{'realms'}{$realm}{'password'} = $entry->{'password'};
$mark->{'realms'}{$realm}{'authtype'} = $authtype;
if ($result{'www-authenticate'} =~ /^ntlm/i) {
# NTLM is different...
my @ntlm_x = split(/ /, $result{'www-authenticate'});
if ($#ntlm_x == 1) {
sleeper();
$request->{'whisker'}->{'allow_short_reads'} = 1;
LW2::http_fixup_request($request);
LW2::http_do_request_timeout(\%request, \%result);
$COUNTERS{'totalrequests'}++;
}
}
if ($result->{'www-authenticate'} eq '' && !defined $result->{'whisker'}->{'error'}) {
unless ($entry->{'checked'} == 1) {
my $message;
if ($entry->{'message'} eq "Credentials provided by CLI.") {
$message =
"Successfully authenticated to realm '$realm' with user-supplied credentials.";
}
elsif ($entry->{'id'} eq '' && $entry->{'password'} eq '') {
$message =
"Blank credentials found at $request{whisker}->{uri}, $entry->{'realm'}: $entry->{'msg'}.";
}
else {
$message =
"Default account found for '$realm' at $request->{'whisker'}->{'uri'} (ID '$entry->{'id'}', PW '$entry->{'password'}'). $entry->{message}.";
}
add_vulnerability($mark, $message, $entry->{tid}, 0, "GET",
$request{whisker}->{uri}, $result);
# Mark it successful
$entry->{'checked'} = 1;
$mark->{'realms'}{$realm}{'status'} = 1;
$mark->{'realms'}{'default'} = $mark->{'realms'}{$realm};
last;
}
}
else {
$result->{'www-authenticate'} = $save_auth;
}
}
LW2::auth_unset(\%request);
return $request, $result;
}
1;
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