mirror of
https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-14 13:56:01 +03:00
Systematically log problems in update_rule_target_ex().
Fix some memory leaks in update_rule_target_ex().
This commit is contained in:
Marc Stern
parent
243d9c978a
commit
a32b512a7f
203
apache2/re.c
203
apache2/re.c
@ -65,13 +65,13 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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char *myvalue = NULL, *myname = NULL;
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int match = 0;
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if(var == NULL)
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if (var == NULL)
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return 0;
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if(rule == NULL)
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if (rule == NULL)
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return 0;
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if(rule->actionset == NULL)
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if (rule->actionset == NULL)
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return 0;
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assert(exceptions != NULL);
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@ -81,7 +81,7 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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c = strchr(myvar,':');
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if(c != NULL) {
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if (c != NULL) {
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myname = apr_strtok(myvar,":",&myvalue);
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} else {
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myname = myvar;
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@ -91,7 +91,7 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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targets = apr_pstrdup(msr->mp, exceptions);
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if(targets != NULL) {
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if (targets != NULL) {
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if (msr->txcfg->debuglog_level >= 9) {
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msr_log(msr, 9, "fetch_target_exception: Found exception target list [%s] for rule id %s", targets, id_log(rule));
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}
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@ -103,18 +103,18 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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c = strchr(variable,':');
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if(c != NULL) {
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if (c != NULL) {
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name = apr_strtok(variable,":",&value);
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} else {
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name = variable;
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value = NULL;
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}
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if((strlen(myname) == strlen(name)) &&
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if ((strlen(myname) == strlen(name)) &&
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(strncasecmp(myname, name,strlen(myname)) == 0)) {
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if(value != NULL && myvalue != NULL) {
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if((strlen(myvalue) == strlen(value)) &&
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if (value != NULL && myvalue != NULL) {
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if ((strlen(myvalue) == strlen(value)) &&
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strncasecmp(myvalue,value,strlen(myvalue)) == 0) {
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if (msr->txcfg->debuglog_level >= 9) {
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msr_log(msr, 9, "fetch_target_exception: Target %s will not be processed.", target);
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@ -145,7 +145,7 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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}
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if(match == 1)
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if (match == 1)
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return 1;
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return 0;
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@ -163,10 +163,10 @@ static int fetch_target_exception(msre_rule *rule, modsec_rec *msr, msre_var *va
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char *msre_ruleset_rule_update_target_matching_exception(modsec_rec *msr, msre_ruleset *ruleset, rule_exception *re, const char *p2, const char *p3) {
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char *err;
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if(ruleset == NULL)
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if (ruleset == NULL)
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return NULL;
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if(p2 == NULL) {
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if (p2 == NULL) {
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return apr_psprintf(ruleset->mp, "Trying to update without a target");
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}
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@ -249,26 +249,24 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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char *target_list = NULL, *replace = NULL;
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int i, rc, match = 0, var_appended = 0;
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if(rule != NULL) {
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if (rule != NULL) {
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target_list = strdup(p2);
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if(target_list == NULL)
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return apr_psprintf(ruleset->mp, "Error to update target - memory allocation");;
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if (target_list == NULL) {
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my_error_msg = apr_psprintf(ruleset->mp, "Error to update target - memory allocation");
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goto end;
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}
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if(p3 != NULL) {
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if (p3 != NULL) {
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replace = strdup(p3);
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if(replace == NULL) {
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free(target_list);
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target_list = NULL;
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return apr_psprintf(ruleset->mp, "Error to update target - memory allocation");;
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if (replace == NULL) {
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my_error_msg = apr_psprintf(ruleset->mp, "Error to update target - memory allocation");
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goto end;
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}
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}
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if(replace != NULL) {
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if (replace != NULL) {
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opt = strchr(replace,'!');
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if(opt != NULL) {
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if (opt != NULL) {
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*opt = '\0';
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opt++;
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param = opt;
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@ -284,29 +282,22 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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opt = strchr(param,':');
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if(opt != NULL) {
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if (opt != NULL) {
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name = apr_strtok(param,":",&value);
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} else {
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name = param;
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}
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if(apr_table_get(ruleset->engine->variables, name) == NULL) {
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if(target_list != NULL)
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free(target_list);
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if(replace != NULL)
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free(replace);
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if(msr) {
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msr_log(msr, 9, "Error to update target - [%s] is not valid target", name);
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}
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return apr_psprintf(ruleset->mp, "Error to update target - [%s] is not valid target", name);
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if (apr_table_get(ruleset->engine->variables, name) == NULL) {
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my_error_msg = apr_psprintf(ruleset->mp, "Error to update target - [%s] is not valid target", name);
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goto end;
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}
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name_len = strlen(name);
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if(value != NULL)
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value_len = strlen(value);
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if (value != NULL) value_len = strlen(value);
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Trying to replace by variable name [%s] value [%s]", name, value);
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}
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#if !defined(MSC_TEST)
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@ -318,13 +309,13 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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targets = (msre_var **)rule->targets->elts;
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// TODO need a good way to remove the element from array, maybe change array by tables or rings
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for (i = 0; i < rule->targets->nelts; i++) {
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if((strlen(targets[i]->name) == strlen(name)) &&
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if ((strlen(targets[i]->name) == strlen(name)) &&
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(strncasecmp(targets[i]->name,name,strlen(targets[i]->name)) == 0) &&
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(targets[i]->is_negated == is_negated) &&
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(targets[i]->is_counting == is_counting)) {
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if(value != NULL && targets[i]->param != NULL) {
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if((strlen(targets[i]->param) == strlen(value)) &&
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if (value != NULL && targets[i]->param != NULL) {
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if ((strlen(targets[i]->param) == strlen(value)) &&
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strncasecmp(targets[i]->param,value,strlen(targets[i]->param)) == 0) {
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memset(targets[i]->name,0,strlen(targets[i]->name));
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memset(targets[i]->param,0,strlen(targets[i]->param));
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@ -346,12 +337,12 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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p = apr_strtok(target_list, ",", &savedptr);
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while(p != NULL) {
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if(replace != NULL) {
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if(match == 1) {
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while (p != NULL) {
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if (replace != NULL) {
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if (match == 1) {
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rc = msre_parse_targets(ruleset, p, rule->targets, &my_error_msg);
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if (rc < 0) {
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Error parsing rule targets to replace variable");
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}
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#if !defined(MSC_TEST)
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@ -361,7 +352,7 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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#endif
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goto end;
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}
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Successfully replaced variable");
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}
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#if !defined(MSC_TEST)
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@ -372,28 +363,31 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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var_appended = 1;
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} else {
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Cannot find variable to replace");
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}
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#if !defined(MSC_TEST)
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else {
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ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, " ModSecurity: Cannot find varibale to replace");
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ap_log_error(APLOG_MARK, APLOG_ERR, 0, NULL, " ModSecurity: Cannot find variable to replace");
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}
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#endif
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goto end;
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}
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} else {
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}
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else {
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target = strdup(p);
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if(target == NULL)
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return NULL;
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if (target == NULL) {
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my_error_msg = apr_psprintf(ruleset->mp, "Error to update target - memory allocation");
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goto end;
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}
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is_negated = is_counting = 0;
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param = name = value = NULL;
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opt = strchr(target,'!');
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if(opt != NULL) {
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if (opt != NULL) {
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*opt = '\0';
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opt++;
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param = opt;
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@ -408,30 +402,22 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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}
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opt = strchr(param,':');
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if(opt != NULL) {
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if (opt != NULL) {
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name = apr_strtok(param,":",&value);
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} else {
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name = param;
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}
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if(apr_table_get(ruleset->engine->variables, name) == NULL) {
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if(target_list != NULL)
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free(target_list);
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if(replace != NULL)
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free(replace);
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if(msr) {
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msr_log(msr, 9, "Error to update target - [%s] is not valid target", name);
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}
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return apr_psprintf(ruleset->mp, "Error to update target - [%s] is not valid target", name);
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if (apr_table_get(ruleset->engine->variables, name) == NULL) {
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my_error_msg = apr_psprintf(ruleset->mp, "Error to update target - [%s] is not valid target", name);
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goto end;
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}
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name_len = strlen(name);
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if(value != NULL)
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value_len = strlen(value);
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if (value != NULL) value_len = strlen(value);
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Trying to append variable name [%s] value [%s]", name, value);
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}
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#if !defined(MSC_TEST)
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@ -443,33 +429,32 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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targets = (msre_var **)rule->targets->elts;
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for (i = 0; i < rule->targets->nelts; i++) {
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if((strlen(targets[i]->name) == strlen(name)) &&
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if ((strlen(targets[i]->name) == strlen(name)) &&
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(strncasecmp(targets[i]->name,name,strlen(targets[i]->name)) == 0) &&
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(targets[i]->is_negated == is_negated) &&
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(targets[i]->is_counting == is_counting)) {
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if(value != NULL && targets[i]->param != NULL) {
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if((strlen(targets[i]->param) == strlen(value)) &&
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if (value != NULL && targets[i]->param != NULL) {
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if ((strlen(targets[i]->param) == strlen(value)) &&
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strncasecmp(targets[i]->param,value,strlen(targets[i]->param)) == 0) {
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match = 1;
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}
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} else if (value == NULL && targets[i]->param == NULL){
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match = 1;
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} else
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continue;
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} else continue;
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}
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}
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if(target != NULL) {
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if (target != NULL) {
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free(target);
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target = NULL;
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}
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if(match == 0 ) {
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if (match == 0 ) {
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rc = msre_parse_targets(ruleset, p, rule->targets, &my_error_msg);
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if (rc < 0) {
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Error parsing rule targets to append variable");
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}
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#if !defined(MSC_TEST)
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@ -481,7 +466,7 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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}
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var_appended = 1;
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} else {
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Skipping variable, already appended");
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}
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#if !defined(MSC_TEST)
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@ -495,11 +480,11 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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p = apr_strtok(NULL,",",&savedptr);
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}
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if(var_appended == 1) {
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if (var_appended == 1) {
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current_targets = msre_generate_target_string(ruleset->mp, rule);
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rule->unparsed = msre_rule_generate_unparsed(ruleset->mp, rule, current_targets, NULL, NULL);
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rule->p1 = apr_pstrdup(ruleset->mp, current_targets);
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if(msr) {
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if (msr) {
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msr_log(msr, 9, "Successfully appended variable");
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}
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#if !defined(MSC_TEST)
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@ -511,19 +496,11 @@ char *update_rule_target_ex(modsec_rec *msr, msre_ruleset *ruleset, msre_rule *r
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}
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end:
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if(target_list != NULL) {
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free(target_list);
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target_list = NULL;
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}
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if(replace != NULL) {
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free(replace);
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replace = NULL;
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}
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if(target != NULL) {
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free(target);
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target = NULL;
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}
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return NULL;
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if (msr && my_error_msg) msr_log(msr, 9, my_error_msg);
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if (target_list != NULL) free(target_list);
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if (replace != NULL) free(replace);
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if (target != NULL) free(target);
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return my_error_msg;
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}
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int msre_ruleset_rule_matches_exception(msre_rule *rule, rule_exception *re) {
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@ -567,7 +544,7 @@ int msre_ruleset_rule_matches_exception(msre_rule *rule, rule_exception *re) {
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for (act = 0; act < tarr->nelts; act++) {
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msre_action *action = (msre_action *)telts[act].val;
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if((action != NULL) && (action->metadata != NULL) && (strcmp("tag", action->metadata->name) == 0)) {
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if ((action != NULL) && (action->metadata != NULL) && (strcmp("tag", action->metadata->name) == 0)) {
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int rc = msc_regexec(re->param_data,
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action->param, strlen(action->param),
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@ -618,7 +595,7 @@ static char *msre_generate_target_string(apr_pool_t *pool, msre_rule *rule) {
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for (i = 0; i < rule->targets->nelts; i++) {
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if(targets[i]->name != NULL && strlen(targets[i]->name) > 0) {
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if (targets[i]->name != NULL && strlen(targets[i]->name) > 0) {
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target_str = apr_pstrcat(pool,
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(target_str == NULL) ? "" : apr_psprintf(pool, "%s|", target_str),
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(targets[i]->is_negated == 0) ? "" : "!",
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@ -1558,12 +1535,12 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
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if ((rule->placeholder == RULE_PH_NONE) || (rule->actionset->id == NULL) || (strcmp(skip_after, rule->actionset->id) != 0)) {
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if(i-1 >=0)
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if (i-1 >=0)
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last_rule = rules[i-1];
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else
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last_rule = rules[0];
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if((last_rule != NULL) && (last_rule->actionset != NULL) && last_rule->actionset->is_chained && (saw_starter == 1)) {
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if ((last_rule != NULL) && (last_rule->actionset != NULL) && last_rule->actionset->is_chained && (saw_starter == 1)) {
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mode = NEXT_RULE;
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skipped = 1;
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--i;
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@ -1655,7 +1632,7 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
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for(j = 0; j < msr->removed_rules_msg->nelts; j++) {
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re = ((rule_exception **)msr->removed_rules_msg->elts)[j];
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if(rule->actionset->msg !=NULL) {
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if (rule->actionset->msg !=NULL) {
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if (msr->txcfg->debuglog_level >= 9) {
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msr_log(msr, 9, "Checking removal of rule msg=\"%s\" against: %s", rule->actionset->msg, re->param);
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@ -1674,7 +1651,7 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
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for(j = 0; j < msr->removed_rules->nelts; j++) {
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range = ((const char**)msr->removed_rules->elts)[j];
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if(rule->actionset->id !=NULL) {
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if (rule->actionset->id !=NULL) {
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if (msr->txcfg->debuglog_level >= 9) {
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msr_log(msr, 9, "Checking removal of rule id=\"%s\" against: %s", rule->actionset->id, range);
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@ -1693,13 +1670,13 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
|
||||
for (act = 0; act < tag_tarr->nelts; act++) {
|
||||
msre_action *action = (msre_action *)tag_telts[act].val;
|
||||
|
||||
if((action != NULL) && (action->metadata != NULL ) && strcmp("tag", action->metadata->name) == 0) {
|
||||
if ((action != NULL) && (action->metadata != NULL ) && strcmp("tag", action->metadata->name) == 0) {
|
||||
|
||||
for(j = 0; j < msr->removed_rules_tag->nelts; j++) {
|
||||
re = ((rule_exception **)msr->removed_rules_tag->elts)[j];
|
||||
|
||||
|
||||
if(action->param != NULL) {
|
||||
if (action->param != NULL) {
|
||||
/* Expand variables in the tag argument. */
|
||||
msc_string *var = (msc_string *)apr_pcalloc(msr->mp, sizeof(msc_string));
|
||||
|
||||
@ -1745,7 +1722,7 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
|
||||
}
|
||||
}
|
||||
|
||||
if(msr->txcfg->is_enabled == MODSEC_DISABLED) {
|
||||
if (msr->txcfg->is_enabled == MODSEC_DISABLED) {
|
||||
saw_starter = 0;
|
||||
skipped = 0;
|
||||
skip_after = NULL;
|
||||
@ -1825,12 +1802,12 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
|
||||
msr_log(msr, 9, "Match, intercepted -> returning.");
|
||||
}
|
||||
|
||||
if(i-1 >= 0)
|
||||
if (i-1 >= 0)
|
||||
last_rule = rules[i-1];
|
||||
else
|
||||
last_rule = rules[0];
|
||||
|
||||
if((last_rule != NULL) && (last_rule->actionset != NULL) && last_rule->actionset->is_chained) {
|
||||
if ((last_rule != NULL) && (last_rule->actionset != NULL) && last_rule->actionset->is_chained) {
|
||||
|
||||
int st = 0;
|
||||
|
||||
@ -1838,8 +1815,8 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
|
||||
|
||||
rule_starter = rules[st];
|
||||
|
||||
if(rule_starter != NULL && rule_starter->chain_starter != NULL) {
|
||||
if((msr != NULL) && (msr->intercept_actionset != NULL) && (rule_starter->actionset != NULL))
|
||||
if (rule_starter != NULL && rule_starter->chain_starter != NULL) {
|
||||
if ((msr != NULL) && (msr->intercept_actionset != NULL) && (rule_starter->actionset != NULL))
|
||||
msr->intercept_actionset->intercept_uri = rule_starter->actionset->intercept_uri;
|
||||
break;
|
||||
}
|
||||
@ -1863,7 +1840,7 @@ static apr_status_t msre_ruleset_process_phase_(msre_ruleset *ruleset, modsec_re
|
||||
continue;
|
||||
}
|
||||
|
||||
if(skipped == 1) {
|
||||
if (skipped == 1) {
|
||||
mode = SKIP_RULES;
|
||||
continue;
|
||||
}
|
||||
@ -2024,7 +2001,7 @@ static msre_rule * msre_ruleset_fetch_phase_rule(const msre_ruleset *ruleset, co
|
||||
&& (strcmp(rule->actionset->id, id) == 0))
|
||||
{
|
||||
/* Return rule that matched unless it is a placeholder */
|
||||
if(offset == 0) {
|
||||
if (offset == 0) {
|
||||
return (rule->placeholder == RULE_PH_NONE) ? rule : NULL;
|
||||
}
|
||||
else {
|
||||
@ -2121,7 +2098,7 @@ static int msre_ruleset_phase_rule_remove_with_exception(msre_ruleset *ruleset,
|
||||
|
||||
for (act = 0; act < tarr->nelts; act++) {
|
||||
msre_action *action = (msre_action *)telts[act].val;
|
||||
if((action != NULL) && (action->metadata != NULL) && (strcmp("tag", action->metadata->name) == 0)) {
|
||||
if ((action != NULL) && (action->metadata != NULL) && (strcmp("tag", action->metadata->name) == 0)) {
|
||||
|
||||
int rc = msc_regexec(re->param_data,
|
||||
action->param, strlen(action->param),
|
||||
@ -2653,7 +2630,7 @@ static int execute_operator(msre_var *var, msre_rule *rule, modsec_rec *msr,
|
||||
if (rc > 0) {
|
||||
rc = fetch_target_exception(rule, msr, var, exceptions);
|
||||
|
||||
if(rc > 0) {
|
||||
if (rc > 0) {
|
||||
|
||||
if (msr->txcfg->debuglog_level >= 4) {
|
||||
msr_log(msr, 4, "Executing operator \"%s%s\" with param \"%s\" against %s skipped.",
|
||||
@ -2701,22 +2678,22 @@ static int execute_operator(msre_var *var, msre_rule *rule, modsec_rec *msr,
|
||||
msr_log(msr, 4, "Operator completed in %" APR_TIME_T_FMT " usec.", (t1 - time_before_op));
|
||||
}
|
||||
|
||||
if(msr->txcfg->max_rule_time > 0) {
|
||||
if (msr->txcfg->max_rule_time > 0) {
|
||||
apr_time_t t1 = apr_time_now();
|
||||
apr_time_t rule_time = 0;
|
||||
const char *rt_time = NULL;
|
||||
|
||||
if(rule->actionset->id != NULL) {
|
||||
if (rule->actionset->id != NULL) {
|
||||
rt_time = apr_table_get(msr->perf_rules, rule->actionset->id);
|
||||
if(rt_time == NULL) {
|
||||
if (rt_time == NULL) {
|
||||
rt_time = apr_psprintf(msr->mp, "%" APR_TIME_T_FMT, (t1 - time_before_op));
|
||||
rule_time = (apr_time_t)atoi(rt_time);
|
||||
if(rule_time >= msr->txcfg->max_rule_time)
|
||||
if (rule_time >= msr->txcfg->max_rule_time)
|
||||
apr_table_setn(msr->perf_rules, rule->actionset->id, rt_time);
|
||||
} else {
|
||||
rule_time = (apr_time_t)atoi(rt_time);
|
||||
rule_time += (t1 - time_before_op);
|
||||
if(rule_time >= msr->txcfg->max_rule_time) {
|
||||
if (rule_time >= msr->txcfg->max_rule_time) {
|
||||
rt_time = apr_psprintf(msr->mp, "%" APR_TIME_T_FMT, rule_time);
|
||||
apr_table_setn(msr->perf_rules, rule->actionset->id, rt_time);
|
||||
}
|
||||
@ -2754,7 +2731,7 @@ static int execute_operator(msre_var *var, msre_rule *rule, modsec_rec *msr,
|
||||
*(const msre_rule **)apr_array_push(msr->matched_rules) = rule;
|
||||
|
||||
/* Save the last matched var data */
|
||||
if(var != NULL && msr != NULL) {
|
||||
if (var != NULL && msr != NULL) {
|
||||
msc_string *mvar = NULL;
|
||||
|
||||
msr->matched_var->name = apr_pstrdup(msr->mp, var->name);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user