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 print <<END
 220 <style type="text/css">
 221 <!--
 222 .section {
 223         border: groove;
 224 }
 225 .row1color {
 226         border: ridge;
 227         background-color: $color{'color22'};
 228 }
 229 .row2color {
 230         border: ridge;
 231         background-color: $color{'color20'};
 232 }
 233 .rowselected {
 234         border: double #FF0000;
 235         background-color: #DCDCDC;
 236 }
 237 -->
 238 </style>
 239 END
 240 ;
 241
 242 &Header::openbigbox('100%', 'left', '', $errormessage);
 243
 244 ###############
 245 # DEBUG DEBUG
 246 # &Header::openbox('100%', 'left', 'DEBUG');
 247 # my $debugCount = 0;
 248 # foreach my $line (sort keys %snortsettings) {
 249 # print "$line = $snortsettings{$line}<br />\n";
 250 # $debugCount++;
 251 # }
 252 # print "&nbsp;Count: $debugCount\n";
 253 # &Header::closebox();
 254 # DEBUG DEBUG
 255 ###############
 256
 257 if ($errormessage) {
 258         &Header::openbox('100%', 'left', $Lang::tr{'error messages'});
 259         print "<class name='base'>$errormessage\n";
 260         print "&nbsp;</class>\n";
 261         &Header::closebox();
 262 }
 263
 264 my $return = `pidof oinkmaster.pl -x`;
 265 chomp($return);
 266 if ($return) {
 267         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
 268         print <<END;
 269         <table>
 270                 <tr><td>
 271                                 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />&nbsp;
 272                         <td>
 273                                 $Lang::tr{'snort working'}
 274                 <tr><td colspan='2' align='center'>
 275                         <form method='post' action='$ENV{'SCRIPT_NAME'}'>
 276                                 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
 277                         </form>
 278                 <tr><td colspan='2' align='left'><pre>
 279 END
 280         my @output = `tail -20 /var/tmp/log`;
 281         foreach (@output) {
 282                 print "$_";
 283         }
 284         print <<END;
 285                         </pre>
 286                 </table>
 287 END
 288         &Header::closebox();
 289         &Header::closebigbox();
 290         &Header::closepage();
 291         exit;
 292         refreshpage();
 293 }
 294
 295 &Header::openbox('100%', 'left', $Lang::tr{'intrusion detection system'});
 296 print <<END
 297 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
 298 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
 299 END
 300 ;
 301 if ($netsettings{'BLUE_DEV'} ne '') {
 302   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} />   BLUE Snort";
 303 }
 304 if ($netsettings{'ORANGE_DEV'} ne '') {
 305   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} />   ORANGE Snort";
 306 }
 307   print "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} />   RED Snort";
 308
 309 print <<END
 310 </td></tr>
 311 <tr>
 312         <td><br><br></td>
 313 </tr>
 314 <tr>
 315         <td><b>$Lang::tr{'ids rules update'}</b></td>
 316 </tr>
 317 <tr>
 318         <td><select name='RULES'>
 319                                 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
 320                                 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
 321                                 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
 322                                 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
 323                                 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
 324                         </select>
 325         </td>
 326 </tr>
 327 <tr>
 328         <td><br />
 329                 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
 330                 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
 331         </td>
 332 </tr>
 333 <tr>
 334         <td nowrap='nowrap'>Oinkcode:&nbsp;<input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
 335 </tr>
 336 <tr>
 337         <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
 338 END
 339 ;
 340 if ( -e "/var/tmp/snortrules.tar.gz"){
 341         my @Info = stat("/var/tmp/snortrules.tar.gz");
 342         $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
 343 }
 344 print "&nbsp;$Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
 345
 346 print <<END
 347 </tr>
 348 </table>
 349 <br><br>
 350 <table width='100%'>
 351 <tr>
 352         <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
 353 </tr>
 354 </table>
 355 </form>
 356 END
 357 ;
 358
 359 if ($results ne '') {
 360         print "$results";
 361 }
 362
 363 &Header::closebox();
 364
 365 &Header::openbox('100%', 'LEFT', $Lang::tr{'intrusion detection system rules'});
 366         # Output display table for rule files
 367         print "<table width='100%'>\n";
 368
 369         # Local variable required for java script to show/hide
 370         # rules of a rulefile.
 371         my $rulesetcount = 1;
 372
 373         # Loop over each rule file
 374         foreach my $rulefile (sort keys(%snortrules)) {
 375                 my $rulechecked = '';
 376
 377                 # Check if rule file is enabled
 378                 if ($snortrules{$rulefile}{"State"} eq 'Enabled') {
 379                         $rulechecked = 'CHECKED';
 380                 }
 381
 382                 # Table and rows for the rule files.
 383                 print"<tr>\n";
 384                 print"<td class='base' width='5%'>\n";
 385                 print"<input type='checkbox' name='SNORT_RULE_$rulefile' $rulechecked>\n";
 386                 print"</td>\n";
 387                 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
 388                 print"<td class='base' width='5%' align='right'>\n";
 389                 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
 390                 print"</td>\n";
 391                 print"</tr>\n";
 392
 393                 # Rows which will be hidden per default and will contain the single rules.
 394                 print"<tr  style='display:none' id='ruleset$rulesetcount'>\n";
 395                 print"<td colspan='3'>\n";
 396
 397                 # Local vars
 398                 my $lines;
 399                 my $rows;
 400                 my $col;
 401
 402                 # New table for the single rules.
 403                 print "<table width='100%'>\n";
 404
 405                 # Loop over rule file rules
 406                 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
 407                         # Local vars
 408                         my $ruledefchecked = '';
 409
 410                         # If 2 rules have been displayed, start a new row
 411                         if (($lines % 2) == 0) {
 412                                 print "</tr><tr>\n";
 413
 414                                 # Increase rows by once.
 415                                 $rows++;
 416                         }
 417
 418                         # Colour lines.
 419                         if ($rows % 2) {
 420                                 $col="bgcolor='$color{'color20'}'";
 421                         } else {
 422                                 $col="bgcolor='$color{'color22'}'";
 423                         }
 424
 425                         # Set rule state
 426                         if ($snortrules{$rulefile}{$sid}{'State'} eq 'Enabled') {
 427                                 $ruledefchecked = 'CHECKED';
 428                         }
 429
 430                         # Create rule checkbox and display rule description
 431                         print "<td class='base' width='5%' align='right' $col>\n";
 432                         print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
 433                         print "</td>\n";
 434                         print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
 435
 436                         # Increment rule count
 437                         $lines++;
 438                 }
 439
 440                 # If do not have a second rule for row, create empty cell
 441                 if (($lines % 2) != 0) {
 442                         print "<td class='base'></td>";
 443                 }
 444
 445                 # Close display table
 446                 print "</tr></table></td></tr>";
 447
 448                 # Finished whith the rule file, increase count.
 449                 $rulesetcount++;
 450         }
 451
 452         # Close display table
 453         print "</table>";
 454
 455 print <<END
 456 <table width='100%'>
 457 <tr>
 458         <td width='100%' align='right'><input type='submit' name='ACTION' value='$Lang::tr{'update'}'>
 459                 &nbsp; <!-- space for future online help link -->
 460         </td>
 461 </tr>
 462 </table>
 463 END
 464 ;
 465 &Header::closebox();
 466
 467 &Header::closebigbox();
 468 &Header::closepage();
 469
 470 sub refreshpage {
 471         &Header::openbox( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
 472                 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
 473         &Header::closebox();
 474 }
 475
 476 sub downloadrulesfile {
 477         my $peer;
 478         my $peerport;
 479
 480         unlink("/var/tmp/log");
 481
 482         unless (-e "${General::swroot}/red/active") {
 483                 $errormessage = $Lang::tr{'could not download latest updates'};
 484                 return undef;
 485         }
 486
 487         my %proxysettings=();
 488         &General::readhash("${General::swroot}/proxy/settings", \%proxysettings);
 489
 490         if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
 491                 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?)?$/);
 492         }
 493
 494         if ($peer) {
 495                 system("wget -r --proxy=on --proxy-user=$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");
 496         } else {
 497                 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
 498         }
 499 }
 500
 501 sub readrulesfile ($) {
 502         my $rulefile = shift;
 503
 504         # Open rule file and read in contents
 505         open(RULEFILE, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
 506
 507         # Store file content in an array.
 508         my @lines = <RULEFILE>;
 509
 510         # Close file.
 511         close(RULEFILE);
 512
 513         # Loop over rule file contents
 514         foreach my $line (@lines) {
 515                 # Remove whitespaces.
 516                 chomp $line;
 517
 518                 # Skip blank  lines.
 519                 next if ($line =~ /^\s*$/);
 520
 521                 # Local vars.
 522                 my $sid;
 523                 my $msg;
 524
 525                 # Gather rule sid and message from the ruleline.
 526                 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
 527                         $msg = $1;
 528                         $sid = $2;
 529
 530                         # Check if a rule has been found.
 531                         if ($sid && $msg) {
 532                                 # Add rule to the snortrules hash.
 533                                 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
 534
 535                                 # Grab status of the rule. Check if ruleline starts with a "dash".
 536                                 if ($line =~ /^\#/) {
 537                                         # If yes, the rule is disabled.
 538                                         $snortrules{$rulefile}{$sid}{'State'} = "Disabled";
 539                                 } else {
 540                                         # Otherwise the rule is enabled.
 541                                         $snortrules{$rulefile}{$sid}{'State'} = "Enabled";
 542                                 }
 543                         }
 544                 }
 545         }
 546 }