]>
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{$rulefile}}) {
156 # Check if there exists a key in the cgiparams hash for this sid.
157 if (exists($cgiparams{$sid})) {
158 # Look if the rule is disabled.
159 if ($snortrules{$rulefile}{$sid}{'State'} eq "off") {
160 # Check if the state has been set to 'on'.
161 if ($cgiparams{$sid} eq "on") {
162 # Add the sid to the enabled_sids array.
163 push(@enabled_sids, $sid);
165 # Drop item from cgiparams hash.
166 delete $cgiparams{$rulefile}{$sid};
170 # Look if the rule is enabled.
171 if ($snortrules{$rulefile}{$sid}{'State'} eq "on") {
172 # Check if the state is 'on' and should be disabled.
173 # In this case there is no entry
174 # for the sid in the cgiparams hash.
175 # Add it to the disabled_sids array.
176 push(@disabled_sids, $sid);
178 # Drop item from cgiparams hash.
179 delete $cgiparams{$rulefile}{$sid};
185 # Open enabled sid's file for writing.
186 open(FILE
, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
188 # Write header to file.
189 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
191 # Check if the enabled_sids array contains any sid's.
193 # Loop through the array of enabled sids and write them to the file.
194 foreach my $sid (@enabled_sids) {
195 print FILE
"enablesid $sid\n";
199 # Close file after writing.
202 # Open disabled sid's file for writing.
203 open(FILE
, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
205 # Write header to file.
206 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
208 # Check if the enabled_sids array contains any sid's.
209 if (@disabled_sids) {
210 # Loop through the array of disabled sids and write them to the file.
211 foreach my $sid (@disabled_sids) {
212 print FILE
"disablesid $sid\n";
216 # Close file after writing.
219 # Open file for used rulefiles.
220 open (FILE
, ">$snortusedrulefilesfile") or die "Could not write to $snortusedrulefilesfile. $!\n";
222 # Write header to file.
223 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
225 # Check if the enabled_rulefiles array contains any entries.
226 if (@enabled_rulefiles) {
227 # Loop through the array of rulefiles which should be loaded and write the to the file.
228 foreach my $file (@enabled_rulefiles) {
229 print FILE
"include \$RULE_PATH/$file\n";
233 # Close file after writing.
236 # Call oinkmaster to alter the ruleset.
239 # Download new ruleset.
240 } elsif ($cgiparams{'RULESET'} eq $Lang::tr
{'download new ruleset'}) {
244 # Call diskfree to gather the free disk space of /var.
245 my @df = `/bin/df -B M /var`;
247 # Loop through the output.
248 foreach my $line (@df) {
249 # Ignore header line.
250 next if $line =~ m/^Filesystem/;
252 # Search for a line with the device information.
253 if ($line =~ m/dev/ ) {
254 # Split the line into single pieces.
255 my @values = split(' ', $line);
256 my ($filesystem, $blocks, $used, $available, $used_perenctage, $mounted_on) = @values;
258 # Check if the available disk space is more than 300MB.
259 if ($available < 300) {
260 # If there is not enough space, print out an error message.
261 $errormessage = "$Lang::tr{'not enough disk space'} < 300MB, /var $1MB";
263 # Call subfunction to download the ruleset.
264 &downloadrulesfile
();
266 # Sleep for 3 seconds.
269 # Gather return of the external wget.
270 $return = `cat /var/tmp/log 2>/dev/null`;
273 # Check if there was an error.
274 if ($return =~ "ERROR") {
275 # Store error message for display.
276 $errormessage = "<br /><pre>".$return."</pre>";
278 # Call subfunction to launch oinkmaster.
281 # Sleep for 2 seconds.
289 if ($snortsettings{'OINKCODE'} ne "") {
290 $errormessage = $Lang::tr
{'invalid input for oink code'} unless ($snortsettings{'OINKCODE'} =~ /^[a-z0-9]+$/);
293 if (!$errormessage) {
294 if ($snortsettings{'RULES'} eq 'subscripted') {
295 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
296 } elsif ($snortsettings{'RULES'} eq 'registered') {
297 $url=" https://www.snort.org/rules/snortrules-snapshot-29111.tar.gz?oinkcode=$snortsettings{'OINKCODE'}";
298 } elsif ($snortsettings{'RULES'} eq 'community') {
299 $url=" https://www.snort.org/rules/community";
301 $url="http://rules.emergingthreats.net/open/snort-2.9.0/emerging.rules.tar.gz";
304 if ($snortsettings{'ACTION'} eq $Lang::tr
{'save'} && $snortsettings{'ACTION2'} eq "snort" ) {
305 &General
::writehash
("${General::swroot}/snort/settings", \
%snortsettings);
306 if ($snortsettings{'ENABLE_SNORT'} eq 'on')
308 system ('/usr/bin/touch', "${General::swroot}/snort/enable");
310 unlink "${General::swroot}/snort/enable";
312 if ($snortsettings{'ENABLE_SNORT_GREEN'} eq 'on')
314 system ('/usr/bin/touch', "${General::swroot}/snort/enable_green");
316 unlink "${General::swroot}/snort/enable_green";
318 if ($snortsettings{'ENABLE_SNORT_BLUE'} eq 'on')
320 system ('/usr/bin/touch', "${General::swroot}/snort/enable_blue");
322 unlink "${General::swroot}/snort/enable_blue";
324 if ($snortsettings{'ENABLE_SNORT_ORANGE'} eq 'on')
326 system ('/usr/bin/touch', "${General::swroot}/snort/enable_orange");
328 unlink "${General::swroot}/snort/enable_orange";
330 if ($snortsettings{'ENABLE_PREPROCESSOR_HTTP_INSPECT'} eq 'on')
332 system ('/usr/bin/touch', "${General::swroot}/snort/enable_preprocessor_http_inspect");
334 unlink "${General::swroot}/snort/enable_preprocessor_http_inspect";
337 system('/usr/local/bin/snortctrl restart >/dev/null');
341 # Read-in snortsettings
342 &General
::readhash
("${General::swroot}/snort/settings", \
%snortsettings);
344 $checked{'ENABLE_SNORT'}{'off'} = '';
345 $checked{'ENABLE_SNORT'}{'on'} = '';
346 $checked{'ENABLE_SNORT'}{$snortsettings{'ENABLE_SNORT'}} = "checked='checked'";
347 $checked{'ENABLE_SNORT_GREEN'}{'off'} = '';
348 $checked{'ENABLE_SNORT_GREEN'}{'on'} = '';
349 $checked{'ENABLE_SNORT_GREEN'}{$snortsettings{'ENABLE_SNORT_GREEN'}} = "checked='checked'";
350 $checked{'ENABLE_SNORT_BLUE'}{'off'} = '';
351 $checked{'ENABLE_SNORT_BLUE'}{'on'} = '';
352 $checked{'ENABLE_SNORT_BLUE'}{$snortsettings{'ENABLE_SNORT_BLUE'}} = "checked='checked'";
353 $checked{'ENABLE_SNORT_ORANGE'}{'off'} = '';
354 $checked{'ENABLE_SNORT_ORANGE'}{'on'} = '';
355 $checked{'ENABLE_SNORT_ORANGE'}{$snortsettings{'ENABLE_SNORT_ORANGE'}} = "checked='checked'";
356 $selected{'RULES'}{'nothing'} = '';
357 $selected{'RULES'}{'community'} = '';
358 $selected{'RULES'}{'emerging'} = '';
359 $selected{'RULES'}{'registered'} = '';
360 $selected{'RULES'}{'subscripted'} = '';
361 $selected{'RULES'}{$snortsettings{'RULES'}} = "selected='selected'";
363 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
368 // Tiny java script function to show/hide the rules
369 // of a given category.
370 function showhide(tblname) {
371 \$("#" + tblname).toggle();
377 &Header
::openbigbox
('100%', 'left', '', $errormessage);
381 # &Header::openbox('100%', 'left', 'DEBUG');
382 # my $debugCount = 0;
383 # foreach my $line (sort keys %snortsettings) {
384 # print "$line = $snortsettings{$line}<br />\n";
387 # print " Count: $debugCount\n";
388 # &Header::closebox();
393 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
394 print "<class name='base'>$errormessage\n";
395 print " </class>\n";
399 my $return = `pidof oinkmaster.pl -x`;
402 &Header
::openbox
( 'Waiting', 1, "<meta http-equiv='refresh' content='10;'>" );
406 <img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' />
408 $Lang::tr{'snort working'}
409 <tr><td colspan='2' align='center'>
410 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
411 <input type='image' alt='$Lang::tr{'reload'}' title='$Lang::tr{'reload'}' src='/images/view-refresh.png' />
413 <tr><td colspan='2' align='left'><pre>
415 my @output = `tail -20 /var/tmp/log`;
424 &Header
::closebigbox
();
425 &Header
::closepage
();
430 &Header
::openbox
('100%', 'left', $Lang::tr
{'intrusion detection system'});
432 <form method='post' action='$ENV{'SCRIPT_NAME'}'><table width='100%'>
433 <tr><td class='base'><input type='checkbox' name='ENABLE_SNORT_GREEN' $checked{'ENABLE_SNORT_GREEN'}{'on'} />GREEN Snort
436 if ($netsettings{'BLUE_DEV'} ne '') {
437 print " <input type='checkbox' name='ENABLE_SNORT_BLUE' $checked{'ENABLE_SNORT_BLUE'}{'on'} /> BLUE Snort";
439 if ($netsettings{'ORANGE_DEV'} ne '') {
440 print " <input type='checkbox' name='ENABLE_SNORT_ORANGE' $checked{'ENABLE_SNORT_ORANGE'}{'on'} /> ORANGE Snort";
442 print " <input type='checkbox' name='ENABLE_SNORT' $checked{'ENABLE_SNORT'}{'on'} /> RED Snort";
450 <td><b>$Lang::tr{'ids rules update'}</b></td>
453 <td><select name='RULES'>
454 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
455 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
456 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
457 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
458 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
464 $Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}<br /><br />
465 $Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}
469 <td nowrap='nowrap'>Oinkcode: <input type='text' size='40' name='OINKCODE' value='$snortsettings{'OINKCODE'}' /></td>
472 <td width='30%' align='left'><br><input type='submit' name='ACTION' value='$Lang::tr{'download new ruleset'}' />
475 if ( -e
"/var/tmp/snortrules.tar.gz"){
476 my @Info = stat("/var/tmp/snortrules.tar.gz");
477 $snortsettings{'INSTALLDATE'} = localtime($Info[9]);
479 print " $Lang::tr{'updates installed'}: $snortsettings{'INSTALLDATE'}</td>";
487 <td align='right'><input type='hidden' name='ACTION2' value='snort' /><input type='submit' name='ACTION' value='$Lang::tr{'save'}' /></td>
496 &Header
::openbox
('100%', 'LEFT', $Lang::tr
{'intrusion detection system rules'});
497 print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
499 # Output display table for rule files
500 print "<table width='100%'>\n";
502 # Local variable required for java script to show/hide
503 # rules of a rulefile.
504 my $rulesetcount = 1;
506 # Loop over each rule file
507 foreach my $rulefile (sort keys(%snortrules)) {
508 my $rulechecked = '';
510 # Check if rule file is enabled
511 if ($snortrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
512 $rulechecked = 'CHECKED';
515 # Table and rows for the rule files.
517 print"<td class='base' width='5%'>\n";
518 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
520 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
521 print"<td class='base' width='5%' align='right'>\n";
522 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
526 # Rows which will be hidden per default and will contain the single rules.
527 print"<tr style='display:none' id='ruleset$rulesetcount'>\n";
528 print"<td colspan='3'>\n";
535 # New table for the single rules.
536 print "<table width='100%'>\n";
538 # Loop over rule file rules
539 foreach my $sid (sort {$a <=> $b} keys(%{$snortrules{$rulefile}})) {
541 my $ruledefchecked = '';
543 # Skip rulefile itself.
544 next if ($sid eq "Rulefile");
546 # If 2 rules have been displayed, start a new row
547 if (($lines % 2) == 0) {
550 # Increase rows by once.
556 $col="bgcolor='$color{'color20'}'";
558 $col="bgcolor='$color{'color22'}'";
562 if ($snortrules{$rulefile}{$sid}{'State'} eq 'on') {
563 $ruledefchecked = 'CHECKED';
566 # Create rule checkbox and display rule description
567 print "<td class='base' width='5%' align='right' $col>\n";
568 print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
570 print "<td class='base' width='45%' $col>$snortrules{$rulefile}{$sid}{'Description'}</td>";
572 # Increment rule count
576 # If do not have a second rule for row, create empty cell
577 if (($lines % 2) != 0) {
578 print "<td class='base'></td>";
581 # Close display table
582 print "</tr></table></td></tr>";
584 # Finished whith the rule file, increase count.
588 # Close display table
594 <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
595 <!-- space for future online help link -->
604 &Header
::closebigbox
();
605 &Header
::closepage
();
608 &Header
::openbox
( 'Waiting', 1, "<meta http-equiv='refresh' content='1;'>" );
609 print "<center><img src='/images/clock.gif' alt='' /><br/><font color='red'>$Lang::tr{'pagerefresh'}</font></center>";
613 sub downloadrulesfile
{
617 unlink("/var/tmp/log");
619 unless (-e
"${General::swroot}/red/active") {
620 $errormessage = $Lang::tr
{'could not download latest updates'};
624 my %proxysettings=();
625 &General
::readhash
("${General::swroot}/proxy/settings", \
%proxysettings);
627 if ($_=$proxysettings{'UPSTREAM_PROXY'}) {
628 ($peer, $peerport) = (/^(?:[a-zA-Z ]+\:\/\
/)?(?:[A-Za-z0-9\_\.\-]*?(?:\:[A-Za-z0-9\_\.\-]*?)?\@)?([a-zA-Z0-9\.\_\-]*?)(?:\:([0-9]{1,5}))?(?:\/.*?
)?
$/);
632 system("wget -r --proxy=on --proxy-user=$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");
634 system("wget -r -o /var/tmp/log --output-document=/var/tmp/snortrules.tar.gz $url");
639 # Call oinkmaster to generate ruleset.
640 system("/usr/local/bin/oinkmaster.pl -v -s -u file:///var/tmp/snortrules.tar.gz -C /var/ipfire/snort/oinkmaster.conf -o /etc/snort/rules >>/var/tmp/log 2>&1 &");
643 sub readrulesfile
($) {
644 my $rulefile = shift;
646 # Open rule file and read in contents
647 open(RULEFILE
, "$snortrulepath/$rulefile") or die "Unable to read $rulefile!";
649 # Store file content in an array.
650 my @lines = <RULEFILE
>;
655 # Loop over rule file contents
656 foreach my $line (@lines) {
657 # Remove whitespaces.
661 next if ($line =~ /^\s*$/);
667 # Gather rule sid and message from the ruleline.
668 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
672 # Check if a rule has been found.
674 # Add rule to the snortrules hash.
675 $snortrules{$rulefile}{$sid}{'Description'} = $msg;
677 # Grab status of the rule. Check if ruleline starts with a "dash".
678 if ($line =~ /^\#/) {
679 # If yes, the rule is disabled.
680 $snortrules{$rulefile}{$sid}{'State'} = "off";
682 # Otherwise the rule is enabled.
683 $snortrules{$rulefile}{$sid}{'State'} = "on";