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-rwxr-xr-xconfig/snort/snort.inc140
1 files changed, 64 insertions, 76 deletions
diff --git a/config/snort/snort.inc b/config/snort/snort.inc
index 52aaed2a..847a0dba 100755
--- a/config/snort/snort.inc
+++ b/config/snort/snort.inc
@@ -5,7 +5,7 @@
* Copyright (C) 2006 Scott Ullrich
* Copyright (C) 2009-2010 Robert Zelaya
* Copyright (C) 2011-2012 Ermal Luci
- * Copyright (C) 2013 Bill Meeks
+ * Copyright (C) 2013,2014 Bill Meeks
* part of pfSense
* All rights reserved.
*
@@ -51,10 +51,10 @@ $snortver = array();
exec("/usr/local/bin/snort -V 2>&1 |/usr/bin/grep Version | /usr/bin/cut -c20-26", $snortver);
$snort_version = $snortver[0];
if (empty($snort_version))
- $snort_version = "2.9.5.5";
+ $snort_version = "2.9.5.6";
/* package version */
-$pfSense_snort_version = "3.0.2";
+$pfSense_snort_version = "3.0.4";
$snort_package_version = "Snort {$snort_version} pkg v{$pfSense_snort_version}";
// Define SNORTDIR and SNORTLIBDIR constants according to pfSense version
@@ -825,11 +825,11 @@ function snort_rm_blocked_install_cron($should_install) {
switch($should_install) {
case true:
$cron_item = array();
- $cron_item['minute'] = "$snort_rm_blocked_min";
- $cron_item['hour'] = "$snort_rm_blocked_hr";
- $cron_item['mday'] = "$snort_rm_blocked_mday";
- $cron_item['month'] = "$snort_rm_blocked_month";
- $cron_item['wday'] = "$snort_rm_blocked_wday";
+ $cron_item['minute'] = $snort_rm_blocked_min;
+ $cron_item['hour'] = $snort_rm_blocked_hr;
+ $cron_item['mday'] = $snort_rm_blocked_mday;
+ $cron_item['month'] = $snort_rm_blocked_month;
+ $cron_item['wday'] = $snort_rm_blocked_wday;
$cron_item['who'] = "root";
$cron_item['command'] = "/usr/bin/nice -n20 /usr/local/sbin/expiretable -t $snort_rm_blocked_expire snort2c";
@@ -927,11 +927,11 @@ function snort_rules_up_install_cron($should_install) {
switch($should_install) {
case true:
$cron_item = array();
- $cron_item['minute'] = "$snort_rules_up_min";
- $cron_item['hour'] = "$snort_rules_up_hr";
- $cron_item['mday'] = "$snort_rules_up_mday";
- $cron_item['month'] = "$snort_rules_up_month";
- $cron_item['wday'] = "$snort_rules_up_wday";
+ $cron_item['minute'] = $snort_rules_up_min;
+ $cron_item['hour'] = $snort_rules_up_hr;
+ $cron_item['mday'] = $snort_rules_up_mday;
+ $cron_item['month'] = $snort_rules_up_month;
+ $cron_item['wday'] = $snort_rules_up_wday;
$cron_item['who'] = "root";
$cron_item['command'] = "/usr/bin/nice -n20 /usr/local/bin/php -f /usr/local/pkg/snort/snort_check_for_rule_updates.php";
@@ -1739,34 +1739,32 @@ function snort_write_enforcing_rules_file($rule_map, $rule_path) {
}
}
-function snort_load_sid_mods($sids, $value) {
+function snort_load_sid_mods($sids) {
/*****************************************/
/* This function parses the string of */
- /* SID values in $sids and returns an */
- /* array with the SID as the key and */
- /* value. The SID values in $sids are */
+ /* GID:SID values in $sids and returns */
+ /* an array with the GID and SID as the */
+ /* keys. The values in $sids are */
/* assumed to be delimited by "||". */
/* */
- /* $sids ==> string of SID values from */
- /* saved config file. */
+ /* $sids ==> string of GID:SID values */
+ /* from the config file. */
/* */
- /* $value ==> type of mod (enable or */
- /* disable). Not currently */
- /* utilized, but maintained */
- /* so as not to break legacy */
- /* code elsewhere. */
+ /* Returns ==> a multidimensional array */
+ /* with GID and SID as the */
+ /* keys ($result[GID][SID]) */
/*****************************************/
$result = array();
- if (empty($sids) || empty($value))
+ if (empty($sids))
return $result;
$tmp = explode("||", $sids);
foreach ($tmp as $v) {
- if (preg_match('/\s\d+/', $v, $match)) {
- if (!is_array($result[trim($match[0])]))
- $result[trim($match[0])] = array();
- $result[trim($match[0])] = trim($match[0]);
+ if (preg_match('/(\d+)\s*:\s*(\d+)/', $v, $match)) {
+ if (!is_array($result[$match[1]]))
+ $result[$match[1]] = array();
+ $result[$match[1]][$match[2]] = "{$match[1]}:{$match[2]}";
}
}
unset($tmp);
@@ -1791,15 +1789,15 @@ function snort_modify_sids(&$rule_map, $snortcfg) {
/* Load up our enablesid and disablesid */
/* arrays with lists of modified SIDs */
- $enablesid = snort_load_sid_mods($snortcfg['rule_sid_on'], "enablesid");
- $disablesid = snort_load_sid_mods($snortcfg['rule_sid_off'], "disablesid");
+ $enablesid = snort_load_sid_mods($snortcfg['rule_sid_on']);
+ $disablesid = snort_load_sid_mods($snortcfg['rule_sid_off']);
/* Turn on any rules that need to be */
/* forced "on" with enablesid mods. */
if (!empty($enablesid)) {
foreach ($rule_map as $k1 => $rulem) {
foreach ($rulem as $k2 => $v) {
- if (in_array($k2, $enablesid) && $v['disabled'] == 1) {
+ if (isset($enablesid[$k1][$k2]) && $v['disabled'] == 1) {
$rule_map[$k1][$k2]['rule'] = ltrim($v['rule'], " \t#");
$rule_map[$k1][$k2]['disabled'] = 0;
}
@@ -1812,7 +1810,7 @@ function snort_modify_sids(&$rule_map, $snortcfg) {
if (!empty($disablesid)) {
foreach ($rule_map as $k1 => $rulem) {
foreach ($rulem as $k2 => $v) {
- if (in_array($k2, $disablesid) && $v['disabled'] == 0) {
+ if (isset($disablesid[$k1][$k2]) && $v['disabled'] == 0) {
$rule_map[$k1][$k2]['rule'] = "# " . $v['rule'];
$rule_map[$k1][$k2]['disabled'] = 1;
}
@@ -2209,12 +2207,13 @@ function snort_prepare_rule_files($snortcfg, $snortcfgdir) {
/* to be written. */
/***********************************************************/
- global $rebuild_rules;
+ global $g, $rebuild_rules;
$snortdir = SNORTDIR;
$flowbit_rules_file = FLOWBITS_FILENAME;
$snort_enforcing_rules_file = ENFORCING_RULES_FILENAME;
$no_rules_defined = true;
+ $enabled_rules = array();
/* If there is no reason to rebuild the rules, exit to save time. */
if (!$rebuild_rules)
@@ -2223,14 +2222,37 @@ function snort_prepare_rule_files($snortcfg, $snortcfgdir) {
/* Log a message for rules rebuild in progress */
log_error(gettext("[Snort] Updating rules configuration for: " . snort_get_friendly_interface($snortcfg['interface']) . " ..."));
+ /* Enable all, some or none of the SDF rules depending on setting. */
+ if ($snortcfg['sensitive_data'] == 'on' && $snortcfg['protect_preproc_rules'] != 'on') {
+ if (file_exists(SNORTDIR."/preproc_rules/sensitive-data.rules")) {
+ $sdf_alert_pattern="(".preg_replace("/,/","|",$snortcfg['sdf_alert_data_type']).")";
+ $sd_tmp_file=file(SNORTDIR."/preproc_rules/sensitive-data.rules");
+ $sd_tmp_new_file="";
+ foreach ($sd_tmp_file as $sd_tmp_line)
+ $sd_tmp_new_file.=preg_match("/$sdf_alert_pattern/i",$sd_tmp_line) ? $sd_tmp_line : "";
+ file_put_contents("{$snortcfgdir}/preproc_rules/sensitive-data.rules",$sd_tmp_new_file,LOCK_EX);
+ }
+ }
+ elseif ($snortcfg['sensitive_data'] != 'on' && $snortcfg['protect_preproc_rules'] != 'on') {
+ /* Setting is "off", so disable all SDF rules. */
+ $sedcmd = '/^alert.*classtype:sdf/s/^/#/';
+ @file_put_contents("{$g['tmp_path']}/sedcmd", $sedcmd);
+ mwexec("/usr/bin/sed -I '' -f {$g['tmp_path']}/sedcmd {$snortcfgdir}/preproc_rules/sensitive-data.rules");
+ @unlink("{$g['tmp_path']}/sedcmd");
+ }
+
+ /* Load the decoder, preprocessor and sensitive-data */
+ /* rules from the interface's preproc_rule directory */
+ /* into the $enabled_rules array. */
+ $enabled_rules = snort_load_rules_map("{$snortcfgdir}/preproc_rules/");
+
/* Only rebuild rules if some are selected or an IPS Policy is enabled */
if (!empty($snortcfg['rulesets']) || $snortcfg['ips_policy_enable'] == 'on') {
- $enabled_rules = array();
$enabled_files = array();
$all_rules = array();
$no_rules_defined = false;
- /* Load up all the rules into a Rules Map array. */
+ /* Load up all the text rules into a Rules Map array. */
$all_rules = snort_load_rules_map("{$snortdir}/rules/");
/* Create an array with the filenames of the enabled */
@@ -2320,7 +2342,8 @@ function snort_prepare_rule_files($snortcfg, $snortcfgdir) {
/* Just put an empty file to always have the file present */
snort_write_flowbit_rules_file(array(), "{$snortcfgdir}/rules/{$flowbit_rules_file}");
} else {
- snort_write_enforcing_rules_file(array(), "{$snortcfgdir}/rules/{$snort_enforcing_rules_file}");
+ /* No regular rules or policy were selected, so just use the decoder and preproc rules */
+ snort_write_enforcing_rules_file($enabled_rules, "{$snortcfgdir}/rules/{$snort_enforcing_rules_file}");
snort_write_flowbit_rules_file(array(), "{$snortcfgdir}/rules/{$flowbit_rules_file}");
}
@@ -2333,7 +2356,7 @@ function snort_prepare_rule_files($snortcfg, $snortcfgdir) {
/* Log a warning if the interface has no rules defined or enabled */
if ($no_rules_defined)
- log_error(gettext("[Snort] Warning - no text rules selected for: " . snort_get_friendly_interface($snortcfg['interface']) . " ..."));
+ log_error(gettext("[Snort] Warning - no text rules or IPS-Policy selected for: " . snort_get_friendly_interface($snortcfg['interface']) . " ..."));
/* Build a new sid-msg.map file from the enabled */
/* rules and copy it to the interface directory. */
@@ -3219,43 +3242,9 @@ EOD;
$snort_misc_include_rules .= "include {$snortcfgdir}/reference.config\n";
if (file_exists("{$snortcfgdir}/classification.config"))
$snort_misc_include_rules .= "include {$snortcfgdir}/classification.config\n";
- if (is_dir("{$snortcfgdir}/preproc_rules")) {
- if ($snortcfg['sensitive_data'] == 'on' && $protect_preproc_rules == "off") {
- $sedcmd = '/^#alert.*classtype:sdf/s/^#//';
- if (file_exists("{$snortcfgdir}/preproc_rules/sensitive-data.rules")){
- $snort_misc_include_rules .= "include \$PREPROC_RULE_PATH/sensitive-data.rules\n";
- #enable only selected sensitive data
- if (file_exists(SNORTDIR."/preproc_rules/sensitive-data.rules")){
- $sdf_alert_pattern="(".preg_replace("/,/","|",$snortcfg['sdf_alert_data_type']).")";
- $sd_tmp_file=file(SNORTDIR."/preproc_rules/sensitive-data.rules");
- $sd_tmp_new_file="";
- foreach ($sd_tmp_file as $sd_tmp_line)
- $sd_tmp_new_file.=preg_match("/$sdf_alert_pattern/i",$sd_tmp_line) ? $sd_tmp_line : "";
- file_put_contents("{$snortcfgdir}/preproc_rules/sensitive-data.rules",$sd_tmp_new_file,LOCK_EX);
- }
- }
- } else
- $sedcmd = '/^alert.*classtype:sdf/s/^/#/';
- if (file_exists("{$snortcfgdir}/preproc_rules/decoder.rules") &&
- file_exists("{$snortcfgdir}/preproc_rules/preprocessor.rules") && $protect_preproc_rules == "off") {
- @file_put_contents("{$g['tmp_path']}/sedcmd", $sedcmd);
- mwexec("/usr/bin/sed -I '' -f {$g['tmp_path']}/sedcmd {$snortcfgdir}/preproc_rules/preprocessor.rules");
- mwexec("/usr/bin/sed -I '' -f {$g['tmp_path']}/sedcmd {$snortcfgdir}/preproc_rules/decoder.rules");
- @unlink("{$g['tmp_path']}/sedcmd");
- $snort_misc_include_rules .= "include \$PREPROC_RULE_PATH/decoder.rules\n";
- $snort_misc_include_rules .= "include \$PREPROC_RULE_PATH/preprocessor.rules\n";
- } else if (file_exists("{$snortcfgdir}/preproc_rules/decoder.rules") &&
- file_exists("{$snortcfgdir}/preproc_rules/preprocessor.rules") && $protect_preproc_rules == "on") {
- $snort_misc_include_rules .= "include \$PREPROC_RULE_PATH/decoder.rules\n";
- $snort_misc_include_rules .= "include \$PREPROC_RULE_PATH/preprocessor.rules\n";
- }
- else {
- $snort_misc_include_rules .= "config autogenerate_preprocessor_decoder_rules\n";
- log_error("[Snort] Seems preprocessor/decoder rules are missing, enabling autogeneration of them");
- }
- } else {
+ if (!file_exists("{$snortcfgdir}/preproc_rules/decoder.rules") || !file_exists("{$snortcfgdir}/preproc_rules/preprocessor.rules")) {
$snort_misc_include_rules .= "config autogenerate_preprocessor_decoder_rules\n";
- log_error("[Snort] Seems preprocessor/decoder rules are missing, enabling autogeneration of them");
+ log_error("[Snort] Seems preprocessor and/or decoder rules are missing, enabling autogeneration of them in conf file.");
}
/* generate rule sections to load */
@@ -3673,9 +3662,8 @@ EOD;
ipvar HOME_NET [{$home_net}]
ipvar EXTERNAL_NET [{$external_net}]
-# Define Rule Paths #
+# Define Rule Path #
var RULE_PATH {$snortcfgdir}/rules
-var PREPROC_RULE_PATH {$snortcfgdir}/preproc_rules
# Define Servers #
{$ipvardef}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-21 20:07:52 +0000