]>
git.ipfire.org Git - people/pmueller/ipfire-2.x.git/blob - html/cgi-bin/ids.cgi
2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2007-2015 IPFire Team <info@ipfire.org> #
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. #
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. #
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/>. #
20 ###############################################################################
24 # enable only the following on debugging purpose
26 #use CGI::Carp 'fatalsToBrowser';
29 require '/var/ipfire/general-functions.pl';
30 require "${General::swroot}/lang.pl";
31 require "${General::swroot}/header.pl";
34 my %mainsettings = ();
41 # Read-in main settings, for language, theme and colors.
42 &General
::readhash
("${General::swroot}/main/settings", \
%mainsettings);
43 &General
::readhash
("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \
%color);
46 &General
::readhash
("${General::swroot}/ethernet/settings", \
%netsettings);
48 &Header
::showhttpheaders
();
50 # Default settings for snort.
51 $snortsettings{'ENABLE_SNORT'} = 'off';
52 $snortsettings{'ENABLE_SNORT_GREEN'} = 'off';
53 $snortsettings{'ENABLE_SNORT_BLUE'} = 'off';
54 $snortsettings{'ENABLE_SNORT_ORANGE'} = 'off';
55 $snortsettings{'ACTION'} = '';
56 $snortsettings{'RULES'} = '';
57 $snortsettings{'OINKCODE'} = '';
58 $snortsettings{'INSTALLDATE'} = '';
61 &Header
::getcgihash
(\
%cgiparams);
63 my $snortrulepath = "/etc/snort/rules";
64 my $snortusedrulefilesfile = "${General::swroot}/snort/snort-used-rulefiles.conf";
65 my $restartsnortrequired = 0;
70 ## Grab all available snort rules and store them in the snortrules hash.
72 # Open snort rules directory and do a directory listing.
73 opendir(DIR
, $snortrulepath) or die $!;
74 # Loop through the direcory.
75 while (my $file = readdir(DIR
)) {
78 next unless (-f
"$snortrulepath/$file");
81 next if (-z
"$snortrulepath/$file");
83 # Use a regular expression to find files ending in .rules
84 next unless ($file =~ m/\.rules$/);
86 # Ignore files which are not read-able.
87 next unless (-R
"$snortrulepath/$file");
89 # Call subfunction to read-in rulefile and add rules to
90 # the snortrules hash.
91 &readrulesfile
("$file");
96 # Gather used rulefiles.
98 # Check if the file for activated rulefiles is not empty.
99 if(-f
$snortusedrulefilesfile) {
100 # Open the file for used rulefile and read-in content.
101 open(FILE
, $snortusedrulefilesfile) or die "Could not open $snortusedrulefilesfile. $!\n";
109 # Loop through the array.
110 foreach my $line (@lines) {
115 next if ($line =~ /\#/);
118 next if ($line =~ /^\s*$/);
120 # Gather rule sid and message from the ruleline.
121 if ($line =~ /.*include \$RULE_PATH\/(.*)/) {
124 # Add the rulefile to the %snortrules hash.
125 $snortrules{$rulefile}{'Rulefile'}{'State'} = "on";
131 if ($cgiparams{'RULESET'} eq $Lang::tr
{'update'}) {
132 my $enabled_sids_file = "${General::swroot}/snort/oinkmaster-enabled-sids.conf";
133 my $disabled_sids_file = "${General::swroot}/snort/oinkmaster-disabled-sids.conf";
135 # Arrays to store sid which should be added to the corresponding files.
138 my @enabled_rulefiles;
140 # Loop through the hash of snortrules.
141 foreach my $rulefile(keys %snortrules) {
142 # Check if the rulefile is enabled.
143 if ($cgiparams{$rulefile} eq "on") {
144 # Add rulefile to the array of enabled rulefiles.
145 push(@enabled_rulefiles, $rulefile);
147 # Drop item from cgiparams hash.
148 delete $cgiparams{$rulefile};
152 # Loop through the hash of snortrules.
153 foreach my $rulefile (keys %snortrules) {
154 # Loop through the single rules of the rulefile.
155 foreach my $sid (keys %{$snortrules{$rulefile}}) {
156 # Skip the current sid if it is not numeric.
157 next unless ($sid =~ /\d+/ );
159 # Check if there exists a key in the cgiparams hash for this sid.
160 if (exists($cgiparams{$sid})) {
161 # Look if the rule is disabled.
162 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
163 # Check if the state has been set to 'on'.
164 if ($cgiparams{$sid} eq "on") {
165 # Add the sid to the enabled_sids array.
166 push(@enabled_sids, $sid);
168 # Drop item from cgiparams hash.
169 delete $cgiparams{$rulefile}{$sid};
173 # Look if the rule is enabled.
174 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
175 # Check if the state is 'on' and should be disabled.
176 # In this case there is no entry
177 # for the sid in the cgiparams hash.
178 # Add it to the disabled_sids array.
179 push(@disabled_sids, $sid);
181 # Drop item from cgiparams hash.
182 delete $cgiparams{$rulefile}{$sid};
188 # Open enabled sid's file for writing.
189 open(FILE
, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
191 # Write header to file.
192 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
194 # Check if the enabled_sids array contains any sid's.
196 # Loop through the array of enabled sids and write them to the file.
197 foreach my $sid (@enabled_sids) {
198 print FILE
"enablesid $sid\n";
202 # Close file after writing.
205 # Open disabled sid's file for writing.
206 open(FILE
, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
208 # Write header to file.
209 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
211 # Check if the enabled_sids array contains any sid's.
212 if (@disabled_sids) {
213 # Loop through the array of disabled sids and write them to the file.
214 foreach my $sid (@disabled_sids) {
215 print FILE
"disablesid $sid\n";
219 # Close file after writing.
222 # Open file for used rulefiles.
223 open (FILE
, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
225 # Write header to file.
226 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
228 # Check if the enabled_rulefiles array contains any entries.
229 if (@enabled_rulefiles) {
230 # Loop through the array of rulefiles which should be loaded and write the to the file.
231 foreach my $file (@enabled_rulefiles) {
232 print FILE
"include \$RULE_PATH/$file\n";
236 # Close file after writing.
239 # Call oinkmaster to alter the ruleset.
242 # Download new ruleset.
243 } elsif ($cgiparams{'RULESET'} eq $Lang::tr
{'download new ruleset'}) {
247 # Call diskfree to gather the free disk space of /var.
248 my @df = `/bin/df -B M /var`;
250 # Loop through the output.
251 foreach my $line (@df) {
252 # Ignore header line.
253 next if $line =~ m/^Filesystem/;
255 # Search for a line with the device information.
256 if ($line =~ m/dev/ ) {
257 # Split the line into single pieces.
258 my @values = split(' ', $line);
259 my ($filesystem, $blocks, $used, $available, $used_perenctage, $mounted_on) = @values;
261 # Check if the available disk space is more than 300MB.
262 if ($available < 300) {
263 # If there is not enough space, print out an error message.
264 $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
266 # Call subfunction to download the ruleset.
267 &downloadrulesfile
();
269 # Sleep for 3 seconds.
272 # Gather return of the external wget.
273 $return = `cat /var/tmp/log 2>/dev/null`;
276 # Check if there was an error.
277 if ($return =~ "ERROR") {
278 # Store error message for display.
279 $errormessage = "<br /><pre>".$return."</pre>";
281 # Call subfunction to launch oinkmaster.
284 # Sleep for 2 seconds.
292 if ($snortsettings{'OINKCODE'} ne "") {
293 $errormessage = $Lang::tr
{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
296 if (!$errormessage) {
297 if ($snortsettings{'RULES'} eq 'subscripted') {
298 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
299 } elsif ($snortsettings{'RULES'} eq 'registered') {
300 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
301 } elsif ($snortsettings{'RULES'} eq 'community') {
302 $url=" https://www.snort.org/rules/community";
304 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
307 if ($snortsettings{'ACTION'} eq $Lang::tr
{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
308 &General
::writehash
("${General::swroot}/snort/settings", \
%snortsettings);
309 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
311 system ('/usr/bin/touch', "${General::swroot}/snort/enable");
313 unlink "${General::swroot}/snort/enable";
315 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
317 system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
319 unlink "${General::swroot}/snort/enable_green";
321 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
323 system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
325 unlink "${General::swroot}/snort/enable_blue";
327 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
329 system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
331 unlink "${General::swroot}/snort/enable_orange";
333 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
335 system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
337 unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
340 system('/usr/local/bin/snortctrl restart >/dev/null');
344 # Read-in snortsettings
345 &General
::readhash
("${General::swroot}/snort/settings", \
%snortsettings);
347 $checked{'ENABLE_SNORT'}{'off'} = '';
348 $checked{'ENABLE_SNORT'}{'on'} = '';
349 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
350 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
351 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
352 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
353 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
354 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
355 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
356 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
357 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
358 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
359 $selected{'RULES'}{'nothing'} = '';
360 $selected{'RULES'}{'community'} = '';
361 $selected{'RULES'}{'emerging'} = '';
362 $selected{'RULES'}{'registered'} = '';
363 $selected{'RULES'}{'subscripted'} = '';
364 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
366 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
371 // Tiny java script function to show/hide the rules
372 // of a given category.
373 function showhide(tblname) {
374 \$("#" + tblname).toggle();
380 &Header
::openbigbox
('100%', 'left', '', $errormessage);
384 # &Header::openbox('100%', 'left', 'DEBUG');
385 # my $debugCount = 0;
386 # foreach my $line (sort keys %snortsettings) {
387 # print "$line = $snortsettings{$line}<br />\n";
390 # print " Count: $debugCount\n";
391 # &Header::closebox();
396 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
397 print "<class name='base'>$errormessage\n";
398 print " </class>\n";
402 my $return = `pidof oinkmaster.pl -x`;
405 &Header
::openbox
( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
409 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />
411 $Lang::tr{'snort working'}
412 <tr><td colspan='2' align='center'>
413 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
414 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
416 <tr><td colspan='2' align='left'><pre>
418 my @output = `tail -20 /var/tmp/log`;
427 &Header
::closebigbox
();
428 &Header
::closepage
();
433 &Header
::openbox
('100%', 'left', $Lang::tr
{'intrusion detection system'});
435 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
436 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
439 if ($netsettings{'BLUE_DEV'} ne '') {
440 print " <input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} /> BLUE Snort";
442 if ($netsettings{'ORANGE_DEV'} ne '') {
443 print " <input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} /> ORANGE Snort";
445 print " <input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} /> RED Snort";
453 <td><b>$Lang::tr{'ids rules update'}</b></td>
456 <td><select name='RULES'>
457 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
458 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
459 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
460 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
461 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
467 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
468 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
472 <td nowrap='nowrap'>Oinkcode: <input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
475 <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
478 if ( -e
"/var/tmp/snortrules.tar.gz"){
479 my @Info = stat("/var/tmp/snortrules.tar.gz");
480 $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
482 print " $Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
490 <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
499 &Header
::openbox
('100%', 'LEFT', $Lang::tr
{'intrusion detection system rules'});
500 print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
502 # Output display table for rule files
503 print "<table width='100%'>\n";
505 # Local variable required for java script to show/hide
506 # rules of a rulefile.
507 my $rulesetcount = 1;
509 # Loop over each rule file
510 foreach my $rulefile (sort keys(%snortrules)) {
511 my $rulechecked = '';
513 # Check if rule file is enabled
514 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
515 $rulechecked = 'CHECKED';
518 # Table and rows for the rule files.
520 print"<td class='base' width='5%'>\n";
521 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
523 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
524 print"<td class='base' width='5%' align='right'>\n";
525 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
529 # Rows which will be hidden per default and will contain the single rules.
530 print"<tr style='display:none' id='ruleset$rulesetcount'>\n";
531 print"<td colspan='3'>\n";
538 # New table for the single rules.
539 print "<table width='100%'>\n";
541 # Loop over rule file rules
542 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
544 my $ruledefchecked = '';
546 # Skip rulefile itself.
547 next if ($sid eq "Rulefile");
549 # If 2 rules have been displayed, start a new row
550 if (($lines % 2) == 0) {
553 # Increase rows by once.
559 $col="bgcolor='$color{'color20'}'";
561 $col="bgcolor='$color{'color22'}'";
565 if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
566 $ruledefchecked = 'CHECKED';
569 # Create rule checkbox and display rule description
570 print "<td class='base' width='5%' align='right' $col>\n";
571 print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
573 print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
575 # Increment rule count
579 # If do not have a second rule for row, create empty cell
580 if (($lines % 2) != 0) {
581 print "<td class='base'></td>";
584 # Close display table
585 print "</tr></table></td></tr>";
587 # Finished whith the rule file, increase count.
591 # Close display table
597 <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
598 <!-- space for future online help link -->
607 &Header
::closebigbox
();
608 &Header
::closepage
();
611 &Header
::openbox
( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
612 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
616 sub downloadrulesfile
{
620 unlink("/var/tmp/log");
622 unless (-e
"${General::swroot}/red/active") {
623 $errormessage = $Lang::tr
{'could not download latest updates'};
627 my %proxysettings=();
628 &General
::readhash
("${General::swroot}/proxy/settings", \
%proxysettings);
630 if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
631 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\
/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?
)?
$/);
635 system("wget -r --proxy=on --proxy-user=$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");
637 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
642 # Call oinkmaster to generate ruleset.
643 system("/usr/local/bin/oinkmaster.pl -v -s -u file:///var/tmp/snortrules.tar.gz -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules >>/var/tmp/log 2>&1 &");
646 sub readrulesfile
($) {
647 my $rulefile = shift;
649 # Open rule file and read in contents
650 open(RULEFILE
, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
652 # Store file content in an array.
653 my @lines = <RULEFILE
>;
658 # Loop over rule file contents
659 foreach my $line (@lines) {
660 # Remove whitespaces.
664 next if ($line =~ /^\s*$/);
670 # Gather rule sid and message from the ruleline.
671 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
675 # Check if a rule has been found.
677 # Add rule to the snortrules hash.
678 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
680 # Grab status of the rule. Check if ruleline starts with a "dash".
681 if ($line =~ /^\#/) {
682 # If yes, the rule is disabled.
683 $snortrules{$rulefile}{$sid}{'State'} = "off";
685 # Otherwise the rule is enabled.
686 $snortrules{$rulefile}{$sid}{'State'} = "on";