html/cgi-bin/ids.cgi

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2007-2015  IPFire Team  <info@ipfire.org>                     #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 use strict;
  23
  24 # enable only the following on debugging purpose
  25 #use warnings;
  26 #use CGI::Carp 'fatalsToBrowser';
  27 use File::Copy;
  28
  29 require '/var/ipfire/general-functions.pl';
  30 require "${General::swroot}/lang.pl";
  31 require "${General::swroot}/header.pl";
  32
  33 my %color = ();
  34 my %mainsettings = ();
  35 &General::readhash("${General::swroot}/main/settings", \%mainsettings);
  36 &General::readhash("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \%color);
  37
  38 my %snortsettings=();
  39 my %checked=();
  40 my %selected=();
  41 my %netsettings=();
  42 our $errormessage = '';
  43 our $results = '';
  44 our $tempdir = '';
  45 our $url='';
  46 &General::readhash("${General::swroot}/ethernet/settings", \%netsettings);
  47
  48 &Header::showhttpheaders();
  49
  50 $snortsettings{'ENABLE_SNORT'} = 'off';
  51 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
  52 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
  53 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
  54 $snortsettings{'ACTION'} = '';
  55 $snortsettings{'RULES'} = '';
  56 $snortsettings{'OINKCODE'} = '';
  57 $snortsettings{'INSTALLDATE'} = '';
  58 $snortsettings{'FILE'} = '';
  59
  60 &Header::getcgihash(\%snortsettings, {'wantfile' => 1, 'filevar' => 'FH'});
  61
  62 my $snortrulepath = "/etc/snort/rules";
  63 my $restartsnortrequired = 0;
  64 my %snortrules;
  65 my $rule = '';
  66 my $table1colour = '';
  67 my $table2colour = '';
  68 my $var = '';
  69 my $value = '';
  70 my $tmp = '';
  71 my $linkedrulefile = '';
  72 my $border = '';
  73 my $checkboxname = '';
  74
  75 ## Grab all available snort rules and store them in the snortrules hash.
  76 #
  77 # Open snort rules directory and do a directory listing.
  78 opendir(DIR, $snortrulepath) or die $!;
  79         # Loop through the direcory.
  80         while (my $file = readdir(DIR)) {
  81
  82                 # We only want files.
  83                 next unless (-f "$snortrulepath/$file");
  84
  85                 # Ignore empty files.
  86                 next if (-z "$snortrulepath/$file");
  87
  88                 # Use a regular expression to find files ending in .rules
  89                 next unless ($file =~ m/\.rules$/);
  90
  91                 # Ignore files which are not read-able.
  92                 next unless (-R "$snortrulepath/$file");
  93
  94                 # Call subfunction to read-in rulefile and add rules to
  95                 # the snortrules hash.
  96                 &readrulesfile("$file");
  97         }
  98
  99 closedir(DIR);
 100
 101 if ($snortsettings{'OINKCODE'} ne "") {
 102         $errormessage = $Lang::tr{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
 103 }
 104
 105 if (!$errormessage) {
 106         if ($snortsettings{'RULES'} eq 'subscripted') {
 107                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 108         } elsif ($snortsettings{'RULES'} eq 'registered') {
 109                 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
 110         } elsif ($snortsettings{'RULES'} eq 'community') {
 111                 $url=" https://www.snort.org/rules/community";
 112         } else {
 113                 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
 114         }
 115
 116         if ($snortsettings{'ACTION'} eq $Lang::tr{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
 117                 &General::writehash("${General::swroot}/snort/settings", \%snortsettings);
 118                 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
 119                 {
 120                         system ('/usr/bin/touch', "${General::swroot}/snort/enable");
 121                 } else {
 122                         unlink "${General::swroot}/snort/enable";
 123                 }
 124                 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
 125                 {
 126                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
 127                 } else {
 128                         unlink "${General::swroot}/snort/enable_green";
 129                 }
 130                 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
 131                 {
 132                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
 133                 } else {
 134                         unlink "${General::swroot}/snort/enable_blue";
 135                 }
 136                 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
 137                 {
 138                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
 139                 } else {
 140                         unlink "${General::swroot}/snort/enable_orange";
 141                 }
 142                 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
 143                 {
 144                         system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
 145                 } else {
 146                         unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
 147                 }
 148
 149                 system('/usr/local/bin/snortctrl restart >/dev/null');
 150         }
 151
 152         # INSTALLMD5 is not in the form, so not retrieved by getcgihash
 153         &General::readhash("${General::swroot}/snort/settings", \%snortsettings);
 154
 155         if ($snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 156                 my @df = `/bin/df -B M /var`;
 157                 foreach my $line (@df) {
 158                         next if $line =~ m/^Filesystem/;
 159                         my $return;
 160
 161                         if ($line =~ m/dev/ ) {
 162                                 $line =~ m/^.* (\d+)M.*$/;
 163                                 my @temp = split(/ +/,$line);
 164                                 if ($1<300) {
 165                                         $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
 166                                 } else {
 167                                         if ( $snortsettings{'ACTION'} eq $Lang::tr{'download new ruleset'}) {
 168                                                 &downloadrulesfile();
 169                                                 sleep(3);
 170                                                 $return = `cat /var/tmp/log 2>/dev/null`;
 171
 172                                         }
 173
 174                                         if ($return =~ "ERROR") {
 175                                                 $errormessage = "<br /><pre>".$return."</pre>";
 176                                         } else {
 177                                                 system("/usr/local/bin/oinkmaster.pl -v -s -u file:///var/tmp/snortrules.tar.gz -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules >>/var/tmp/log 2>&1 &");
 178                                                 sleep(2);
 179                                         }
 180                                 }
 181                         }
 182                 }
 183         }
 184 }
 185
 186 $checked{'ENABLE_SNORT'}{'off'} = '';
 187 $checked{'ENABLE_SNORT'}{'on'} = '';
 188 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
 189 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
 190 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
 191 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
 192 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
 193 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
 194 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
 195 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
 196 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
 197 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
 198 $selected{'RULES'}{'nothing'} = '';
 199 $selected{'RULES'}{'community'} = '';
 200 $selected{'RULES'}{'emerging'} = '';
 201 $selected{'RULES'}{'registered'} = '';
 202 $selected{'RULES'}{'subscripted'} = '';
 203 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
 204
 205 &Header::openpage($Lang::tr{'intrusion detection system'}, 1, '');
 206
 207 ### Java Script ###
 208 print <<END
 209 <script>
 210         // Tiny java script function to show/hide the rules
 211         // of a given category.
 212         function showhide(tblname) {
 213                 \$("#" + tblname).toggle();
 214         }
 215 </script>
 216 END
 217 ;
 218
 219 &Header::openbigbox('100%', 'left', '', $errormessage);
 220
 221 ###############
 222 # DEBUG DEBUG
 223 # &Header::openbox('100%', 'left', 'DEBUG');
 224 # my $debugCount = 0;
 225 # foreach my $line (sort keys %snortsettings) {
 226 # print "$line = $snortsettings{$line}<br />\n";
 227 # $debugCount++;
 228 # }
 229 # print "&nbsp;Count: $debugCount\n";
 230 # &Header::closebox();
 231 # DEBUG DEBUG
 232 ###############
 233
 234 if ($errormessage) {
 235         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 236         print "<class name='base'>$errormessage\n";
 237         print "&nbsp;</class>\n";
 238         &Header::closebox();
 239 }
 240
 241 my $return = `pidof oinkmaster.pl -x`;
 242 chomp($return);
 243 if ($return) {
 244         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 245         print <<END;
 246         <table>
 247                 <tr><td>
 248                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 249                         <td>
 250                                 $Lang::tr{'snort working'}
 251                 <tr><td colspan='2' align='center'>
 252                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 253                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 254                         </form>
 255                 <tr><td colspan='2' align='left'><pre>
 256 END
 257         my @output = `tail -20 /var/tmp/log`;
 258         foreach (@output) {
 259                 print "$_";
 260         }
 261         print <<END;
 262                         </pre>
 263                 </table>
 264 END
 265         &Header::closebox();
 266         &Header::closebigbox();
 267         &Header::closepage();
 268         exit;
 269         refreshpage();
 270 }
 271
 272 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 273 print <<END
 274 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 275 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 276 END
 277 ;
 278 if ($netsettings{'BLUE_DEV'} ne '') {
 279   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 280 }
 281 if ($netsettings{'ORANGE_DEV'} ne '') {
 282   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 283 }
 284   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 285
 286 print <<END
 287 </td></tr>
 288 <tr>
 289         <td><br><br></td>
 290 </tr>
 291 <tr>
 292         <td><b>$Lang::tr{'ids rules update'}</b></td>
 293 </tr>
 294 <tr>
 295         <td><select name='RULES'>
 296                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 297                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 298                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 299                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 300                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 301                         </select>
 302         </td>
 303 </tr>
 304 <tr>
 305         <td><br />
 306                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 307                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 308         </td>
 309 </tr>
 310 <tr>
 311         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 312 </tr>
 313 <tr>
 314         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 315 END
 316 ;
 317 if ( -e "/var/tmp/snortrules.tar.gz"){
 318         my @Info = stat("/var/tmp/snortrules.tar.gz");
 319         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 320 }
 321 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 322
 323 print <<END
 324 </tr>
 325 </table>
 326 <br><br>
 327 <table width='100%'>
 328 <tr>
 329         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 330 </tr>
 331 </table>
 332 </form>
 333 END
 334 ;
 335
 336 if ($results ne '') {
 337         print "$results";
 338 }
 339
 340 &Header::closebox();
 341
 342 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 343         # Output display table for rule files
 344         print "<table width='100%'>\n";
 345
 346         # Local variable required for java script to show/hide
 347         # rules of a rulefile.
 348         my $rulesetcount = 1;
 349
 350         # Loop over each rule file
 351         foreach my $rulefile (sort keys(%snortrules)) {
 352                 my $rulechecked = '';
 353
 354                 # Check if rule file is enabled
 355                 if ($snortrules{$rulefile}{"State"} eq 'Enabled') {
 356                         $rulechecked = 'CHECKED';
 357                 }
 358
 359                 # Table and rows for the rule files.
 360                 print"<tr>\n";
 361                 print"<td class='base' width='5%'>\n";
 362                 print"<input type='checkbox' name='SNORT_RULE_$rulefile' $rulechecked>\n";
 363                 print"</td>\n";
 364                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 365                 print"<td class='base' width='5%' align='right'>\n";
 366                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 367                 print"</td>\n";
 368                 print"</tr>\n";
 369
 370                 # Rows which will be hidden per default and will contain the single rules.
 371                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 372                 print"<td colspan='3'>\n";
 373
 374                 # Local vars
 375                 my $lines;
 376                 my $rows;
 377                 my $col;
 378
 379                 # New table for the single rules.
 380                 print "<table width='100%'>\n";
 381
 382                 # Loop over rule file rules
 383                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 384                         # Local vars
 385                         my $ruledefchecked = '';
 386
 387                         # If 2 rules have been displayed, start a new row
 388                         if (($lines % 2) == 0) {
 389                                 print "</tr><tr>\n";
 390
 391                                 # Increase rows by once.
 392                                 $rows++;
 393                         }
 394
 395                         # Colour lines.
 396                         if ($rows % 2) {
 397                                 $col="bgcolor='$color{'color20'}'";
 398                         } else {
 399                                 $col="bgcolor='$color{'color22'}'";
 400                         }
 401
 402                         # Set rule state
 403                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'Enabled') {
 404                                 $ruledefchecked = 'CHECKED';
 405                         }
 406
 407                         # Create rule checkbox and display rule description
 408                         print "<td class='base' width='5%' align='right' $col>\n";
 409                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 410                         print "</td>\n";
 411                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 412
 413                         # Increment rule count
 414                         $lines++;
 415                 }
 416
 417                 # If do not have a second rule for row, create empty cell
 418                 if (($lines % 2) != 0) {
 419                         print "<td class='base'></td>";
 420                 }
 421
 422                 # Close display table
 423                 print "</tr></table></td></tr>";
 424
 425                 # Finished whith the rule file, increase count.
 426                 $rulesetcount++;
 427         }
 428
 429         # Close display table
 430         print "</table>";
 431
 432 print <<END
 433 <table width='100%'>
 434 <tr>
 435         <td width='100%' align='right'><input type='submit' name='ACTION' value='$Lang::tr{'update'}'>
 436                 &nbsp; <!-- space for future online help link -->
 437         </td>
 438 </tr>
 439 </table>
 440 END
 441 ;
 442 &Header::closebox();
 443
 444 &Header::closebigbox();
 445 &Header::closepage();
 446
 447 sub refreshpage {
 448         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 449                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 450         &Header::closebox();
 451 }
 452
 453 sub downloadrulesfile {
 454         my $peer;
 455         my $peerport;
 456
 457         unlink("/var/tmp/log");
 458
 459         unless (-e "${General::swroot}/red/active") {
 460                 $errormessage = $Lang::tr{'could not download latest updates'};
 461                 return undef;
 462         }
 463
 464         my %proxysettings=();
 465         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 466
 467         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 468                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 469         }
 470
 471         if ($peer) {
 472                 system("wget -r --proxy=on --proxy-user=$proxysettings{'UPSTREAM_USER'} --proxy-passwd=$proxysettings{'UPSTREAM_PASSWORD'} -e http_proxy=http://$peer:$peerport/ -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 473         } else {
 474                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 475         }
 476 }
 477
 478 sub readrulesfile ($) {
 479         my $rulefile = shift;
 480
 481         # Open rule file and read in contents
 482         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 483
 484         # Store file content in an array.
 485         my @lines = <RULEFILE>;
 486
 487         # Close file.
 488         close(RULEFILE);
 489
 490         # Loop over rule file contents
 491         foreach my $line (@lines) {
 492                 # Remove whitespaces.
 493                 chomp $line;
 494
 495                 # Skip blank  lines.
 496                 next if ($line =~ /^\s*$/);
 497
 498                 # Local vars.
 499                 my $sid;
 500                 my $msg;
 501
 502                 # Gather rule sid and message from the ruleline.
 503                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 504                         $msg = $1;
 505                         $sid = $2;
 506
 507                         # Check if a rule has been found.
 508                         if ($sid && $msg) {
 509                                 # Add rule to the snortrules hash.
 510                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 511
 512                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 513                                 if ($line =~ /^\#/) {
 514                                         # If yes, the rule is disabled.
 515                                         $snortrules{$rulefile}{$sid}{'State'} = "Disabled";
 516                                 } else {
 517                                         # Otherwise the rule is enabled.
 518                                         $snortrules{$rulefile}{$sid}{'State'} = "Enabled";
 519                                 }
 520                         }
 521                 }
 522         }
 523 }