#VERSION,2.03
# $Id: nikto_apacheusers.plugin 300 2010-02-01 21:02:40Z 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:
# Apache user enumeration
###############################################################################
sub nikto_apacheusers_init
{
   my $id =
   {
      name         => "apacheusers",
      full_name    => "Apache Users",
      author       => "Sullo",
      description  => "Checks whether we can enumerate usernames directly from the web server",
      scan_method  => \&nikto_apacheusers,
      copyright    => "2008 CIRT Inc."
   };
   return $id;
}

sub nikto_apacheusers
{
   my ($mark) = @_;
   (my $RES, $CONTENT) = nfetch($mark, "/~root", "GET", "", "", "", "apacheusers: known user");

   $CONTENT = char_escape($CONTENT);
   if ($CONTENT =~ /forbidden/i)    # good on "root"
   {
      (my $RES, $CONTENT) = nfetch($mark, "/~" . LW2::utils_randstr(8), "GET", "", "", "", "apacheusers: invalid user");

      $CONTENT = char_escape($CONTENT);
      if ($CONTENT !~ /forbidden/i)    # Good, it gave an error instead of forbidden
      {
         add_vulnerability($mark, "Enumeration of users is possible by requesting ~username (responds with 'Forbidden' for users, 'not found' for non-existent users).", 999999, 637, "GET", "/~root");
      }
   }
}

1;