Changes RULE variable group to be save at transient collection

This commit is contained in:
Felipe Zimmerle 2016-11-28 10:05:15 -03:00
parent 2930d40d57
commit a776cce6d7
No known key found for this signature in database
GPG Key ID: E6DFB08CE8B11277
6 changed files with 425 additions and 430 deletions

View File

@ -24,6 +24,7 @@
#define HEADERS_MODSECURITY_RULE_H_
#include "modsecurity/transaction.h"
#include "modsecurity/collection/variable.h"
#ifdef __cplusplus
@ -51,11 +52,26 @@ class Rule {
~Rule();
bool evaluate(Transaction *transaction);
bool evaluateActions(Transaction *transaction);
std::vector<const collection::Variable *> getFinalVars(Transaction *trasn);
void executeActionsAfterFullMatch(Transaction *trasn,
bool containsDisruptive, RuleMessage *ruleMessage);
std::vector<std::string> executeSecDefaultActionTransofrmations(
Transaction *trasn, std::string &value, bool multiMatch);
bool executeOperatorAt(Transaction *trasn, std::string key,
std::string value);
void executeActionsIndependentOfChainedRuleResult(Transaction *trasn,
bool *b, RuleMessage *ruleMessage);
std::string resolveMatchMessage(std::string key, std::string value);
void updateMatchedVars(Transaction *trasn, std::string key,
std::string value);
void cleanMatchedVars(Transaction *trasn);
void updateRulesVariable(Transaction *trasn);
operators::Operator *op;
std::vector<actions::Action *> actions_conf;
std::vector<actions::Action *> actions_runtime_pre;
std::vector<actions::Action *> actions_runtime_pos;
std::vector<actions::Action *> m_actionsConf;
std::vector<actions::Action *> m_actionsRuntimePre;
std::vector<actions::Action *> m_actionsRuntimePos;
std::vector<std::string> getActionNames();
std::vector<actions::Action *> getActionsByName(const std::string& name);
@ -87,7 +103,6 @@ class Rule {
std::string m_fileName;
int m_lineNumber;
std::string m_log_message;
std::string m_log_data;
int m_accuracy;
int m_maturity;

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@ -82,6 +82,9 @@ bool Severity::evaluate(Rule *rule, Transaction *transaction,
if (transaction->m_highestSeverityAction > this->m_severity) {
transaction->m_highestSeverityAction = this->m_severity;
}
transaction->m_collections.storeOrUpdateFirst("RULE:severity",
std::to_string(m_severity));
return true;
}

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@ -73,7 +73,7 @@ std::string MacroExpansion::expand(const std::string& input,
std::string var = std::string(variable, collection + 1,
variable.length() - (collection + 1));
if (utils::string::toupper(col) == "RULE") {
/*if (utils::string::toupper(col) == "RULE") {
if (rule == NULL) {
transaction->debug(9, "macro expansion: cannot resolve " \
"RULE variable without the Rule object");
@ -89,6 +89,10 @@ std::string MacroExpansion::expand(const std::string& input,
for (auto *i : l) {
delete i;
}
}*/
if (utils::string::toupper(col) == "RULE") {
variableValue = transaction->m_collections.resolveFirst(
"RULE:" + var);
} else {
variableValue = transaction->m_collections.resolveFirst(col,
var);

View File

@ -943,6 +943,13 @@ var:
}
| RUN_TIME_VAR_RULE
{
std::string name($1);
CHECK_VARIATION_DECL
CHECK_VARIATION(&) { var = new Count(new Variable(name, Variable::VariableKind::DirectVariable)); }
CHECK_VARIATION(!) { var = new Exclusion(new Variable(name, Variable::VariableKind::DirectVariable)); }
if (!var) { var = new Variable(name, Variable::VariableKind::DirectVariable); }
$$ = var;
/*
std::string name($1);
CHECK_VARIATION_DECL
CHECK_VARIATION(&) { var = new Count(
@ -951,6 +958,7 @@ var:
new modsecurity::Variables::Rule(name)); }
if (!var) { var = new modsecurity::Variables::Rule(name); }
$$ = var;
*/
}
;

View File

@ -34,6 +34,9 @@
#include "modsecurity/rules.h"
#include "modsecurity/rule_message.h"
#include "src/macro_expansion.h"
#include "src/actions/msg.h"
#include "src/actions/log_data.h"
#include "src/actions/severity.h"
using modsecurity::Variables::Variations::Exclusion;
@ -49,19 +52,19 @@ Rule::~Rule() {
if (op != NULL) {
delete op;
}
while (actions_conf.empty() == false) {
auto *a = actions_conf.back();
actions_conf.pop_back();
while (m_actionsConf.empty() == false) {
auto *a = m_actionsConf.back();
m_actionsConf.pop_back();
delete a;
}
while (actions_runtime_pre.empty() == false) {
auto *a = actions_runtime_pre.back();
actions_runtime_pre.pop_back();
while (m_actionsRuntimePre.empty() == false) {
auto *a = m_actionsRuntimePre.back();
m_actionsRuntimePre.pop_back();
delete a;
}
while (actions_runtime_pos.empty() == false) {
auto *a = actions_runtime_pos.back();
actions_runtime_pos.pop_back();
while (m_actionsRuntimePos.empty() == false) {
auto *a = m_actionsRuntimePos.back();
m_actionsRuntimePos.pop_back();
delete a;
}
while (variables != NULL && variables->empty() == false) {
@ -116,13 +119,13 @@ Rule::Rule(Operator *_op,
if (actions != NULL) {
for (Action *a : *actions) {
if (a->action_kind == Action::ConfigurationKind) {
actions_conf.push_back(a);
m_actionsConf.push_back(a);
a->evaluate(this, NULL);
} else if (a->action_kind
== Action::RunTimeBeforeMatchAttemptKind) {
actions_runtime_pre.push_back(a);
m_actionsRuntimePre.push_back(a);
} else if (a->action_kind == Action::RunTimeOnlyIfMatchKind) {
actions_runtime_pos.push_back(a);
m_actionsRuntimePos.push_back(a);
} else {
std::cout << "General failure, action: " << a->m_name;
std::cout << " has an unknown type." << std::endl;
@ -148,13 +151,13 @@ Rule::Rule(Operator *_op,
std::vector<std::string> Rule::getActionNames() {
std::vector<std::string> a;
for (auto &z : this->actions_runtime_pos) {
for (auto &z : this->m_actionsRuntimePos) {
a.push_back(z->m_name);
}
for (auto &z : this->actions_runtime_pre) {
for (auto &z : this->m_actionsRuntimePre) {
a.push_back(z->m_name);
}
for (auto &z : this->actions_conf) {
for (auto &z : this->m_actionsConf) {
a.push_back(z->m_name);
}
@ -163,164 +166,220 @@ std::vector<std::string> Rule::getActionNames() {
bool Rule::evaluateActions(Transaction *trasn) {
return true;
}
void Rule::updateMatchedVars(Transaction *trasn, std::string key,
std::string value) {
trasn->debug(4, "Matched vars updated.");
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR", value);
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR_NAME", key);
trasn->m_collections.store("MATCHED_VARS:" + key, value);
trasn->m_collections.store("MATCHED_VARS_NAMES:" + key, key);
}
void Rule::cleanMatchedVars(Transaction *trasn) {
trasn->debug(4, "Matched vars cleaned.");
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR", "");
trasn->m_collections.del("MATCHED_VARS_NAME");
trasn->m_collections.del("MATCHED_VARS");
trasn->m_collections.del("MATCHED_VARS_NAMES");
}
void Rule::updateRulesVariable(Transaction *trasn) {
if (rule_id != 0) {
trasn->m_collections.storeOrUpdateFirst("RULE:id",
std::to_string(rule_id));
}
if (m_rev.empty() == false) {
trasn->m_collections.storeOrUpdateFirst("RULE:rev", m_rev);
}
if (getActionsByName("msg").size() > 0) {
actions::Msg *msg = dynamic_cast<actions::Msg*>(
getActionsByName("msg")[0]);
trasn->m_collections.storeOrUpdateFirst("RULE:msg", msg->data(trasn));
}
if (getActionsByName("logdata").size() > 0) {
actions::LogData *data = dynamic_cast<actions::LogData*>(
getActionsByName("logdata")[0]);
trasn->m_collections.storeOrUpdateFirst("RULE:logdata",
data->data(trasn));
}
if (getActionsByName("severity").size() > 0) {
actions::Severity *data = dynamic_cast<actions::Severity*>(
getActionsByName("severity")[0]);
trasn->m_collections.storeOrUpdateFirst("RULE:severity",
std::to_string(data->m_severity));
}
}
std::string Rule::resolveMatchMessage(std::string key, std::string value) {
std::string ret = this->op->m_match_message;
if (ret.empty() == true) {
ret = "Matched \"Operator `" + this->op->m_op + "' with parameter `" +
utils::string::limitTo(200, this->op->m_param) +
"' against variable `" + key + "' (Value: `" +
utils::string::limitTo(100, utils::string::toHexIfNeeded(value)) +
"' ) \" at " + key;
}
return ret;
}
void Rule::executeActionsIndependentOfChainedRuleResult(Transaction *trasn,
bool *containsDisruptive, RuleMessage *ruleMessage) {
for (Action *a : this->m_actionsRuntimePos) {
if (a->isDisruptive() == true) {
if (a->m_name == "pass") {
trasn->debug(4, "Rule contains a `pass' action");
} else {
*containsDisruptive = true;
}
} else {
if (a->m_name == "setvar"
|| a->m_name == "msg"
|| a->m_name == "log") {
trasn->debug(4, "Running [I] (_non_ disruptive) " \
"action: " + a->m_name);
a->evaluate(this, trasn, ruleMessage);
}
}
}
for (auto &z : ruleMessage->m_tmp_actions) {
trasn->m_actions.push_back(z);
}
}
bool Rule::executeOperatorAt(Transaction *trasn, std::string key,
std::string value) {
clock_t begin = clock();
clock_t end;
double elapsed_s = 0;
bool ret;
trasn->debug(9, "Target value: \"" + utils::string::limitTo(80,
utils::string::toHexIfNeeded(value)) \
+ "\" (Variable: " + key + ")");
ret = this->op->evaluateInternal(trasn, this, value);
if (ret == false) {
return false;
}
end = clock();
elapsed_s = static_cast<double>(end - begin) / CLOCKS_PER_SEC;
trasn->debug(4, "Operator completed in " + \
std::to_string(elapsed_s) + " seconds");
return ret;
}
// FIXME: this should be a list instead of a vector, keeping the but
// of v2 alive.
std::vector<std::string> Rule::executeSecDefaultActionTransofrmations(
Transaction *trasn, std::string &value, bool multiMatch) {
int none = 0;
bool containsDisruptive = false;
// int transformations = 0;
for (Action *a : this->actions_runtime_pre) {
int transformations = 0;
std::vector<std::string> ret;
if (multiMatch == true) {
ret.push_back(value);
ret.push_back(value);
}
for (Action *a : this->m_actionsRuntimePre) {
if (a->m_isNone) {
none++;
}
}
#ifndef NO_LOGS
trasn->debug(4, "Running unconditional rule.");
#endif
// Check for transformations on the SecDefaultAction
// Notice that first we make sure that won't be a t:none
// on the target rule.
if (none == 0) {
/*
for (Action *a : trasn->m_rules->defaultActions[this->phase]) {
if (a->action_kind == actions::Action::RunTimeBeforeMatchAttemptKind) {
value = a->evaluate(value, trasn);
if (a->action_kind \
== actions::Action::RunTimeBeforeMatchAttemptKind) {
std::string oldValue = value;
if (multiMatch) {
oldValue = ret.back();
}
std::string newValue = a->evaluate(oldValue, trasn);
if (multiMatch == true) {
if (newValue != oldValue) {
ret.push_back(newValue);
}
} else {
value = newValue;
}
trasn->debug(9, "(SecDefaultAction) T (" + \
std::to_string(transformations) + ") " + \
a->name + ": \"" + value +"\"");
transformations++;
a->m_name + ": \"" + \
utils::string::limitTo(80, newValue) +"\"");
transformations++;
}
}
*/
}
for (Action *a : this->actions_runtime_pre) {
/*
for (Action *a : this->m_actionsRuntimePre) {
if (none == 0) {
value = a->evaluate(value, trasn);
std::string oldValue = value;
if (multiMatch) {
oldValue = ret.back();
}
std::string newValue = a->evaluate(oldValue, trasn);
if (multiMatch == true) {
if (newValue != oldValue) {
ret.push_back(newValue);
}
} else {
value = newValue;
}
trasn->debug(9, " T (" + \
std::to_string(transformations) + ") " + \
a->name + ": \"" + value +"\"");
transformations++;
a->m_name + ": \"" + \
utils::string::limitTo(80, newValue) + "\"");
transformations++;
}
*/
if (a->m_isNone) {
none--;
}
}
for (Action *a : this->actions_runtime_pos) {
if (a->isDisruptive() == false) {
#ifndef NO_LOGS
trasn->debug(4, "Running [III] (_non_ disruptive) action: " +
a->m_name + ".");
#endif
a->evaluate(this, trasn);
} else {
containsDisruptive = true;
if (multiMatch == true) {
// v2 checks the last entry twice. Don't know why.
ret.push_back(ret.back());
trasn->debug(9, "multiMatch is enabled. " \
+ std::to_string(ret.size()) + \
" values to be tested.");
for (const std::string &a : ret) {
trasn->debug(9, " - " + a);
}
} else {
ret.push_back(value);
}
for (Action *a : trasn->m_rules->defaultActions[this->phase]) {
if (a->action_kind == actions::Action::RunTimeOnlyIfMatchKind) {
if (a->isDisruptive()) {
if (containsDisruptive) {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) " \
"_ignoring_ action: " + a->m_name + \
" (rule contains a disruptive action)");
#endif
} else {
if (trasn->m_rules->m_secRuleEngine
== Rules::EnabledRuleEngine) {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) " \
"Running action: " + a->m_name + \
" (rule _does not_ contains a " \
"disruptive action)");
#endif
a->evaluate(this, trasn);
} else {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) " \
"_Not_ running action: " + a->m_name + \
". Rule _does not_ contains a " \
"disruptive action, but SecRuleEngine is not On.");
#endif
}
}
} else {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) Running action: " + \
a->m_name);
a->evaluate(this, trasn);
#endif
}
}
}
for (Action *a : this->actions_runtime_pos) {
if (a->isDisruptive()
&& trasn->m_rules->m_secRuleEngine
== Rules::EnabledRuleEngine) {
#ifndef NO_LOGS
trasn->debug(4, "Running (disruptive) action: " + a->m_name);
#endif
a->evaluate(this, trasn);
} else if (a->isDisruptive()) {
#ifndef NO_LOGS
trasn->debug(4, "Not running disruptive action: " + \
a->m_name + ". SecRuleEngine is not On");
#endif
}
}
return true;
return ret;
}
bool Rule::evaluate(Transaction *trasn) {
bool ret = false;
bool globalRet = false;
std::vector<Variable *> *variables = this->variables;
RuleMessage *ruleMessage = NULL;
trasn->m_matched.clear();
if (m_secmarker == true) {
return true;
}
if (m_unconditional == true) {
return evaluateActions(trasn);
}
for (auto &i : trasn->m_ruleRemoveById) {
if (rule_id != i) {
continue;
}
trasn->debug(9, "Rule id: " + std::to_string(rule_id) +
" was skipped due to an ruleRemoveById action...");
return true;
}
ruleMessage = new modsecurity::RuleMessage(this, m_log_message);
#ifndef NO_LOGS
std::string eparam = MacroExpansion::expand(this->op->m_param, trasn);
if (this->op->m_param != eparam) {
eparam = "\"" + eparam + "\" Was: \"" + this->op->m_param + "\"";
} else {
eparam = "\"" + eparam + "\"";
}
trasn->debug(4, "(Rule: " + std::to_string(rule_id) \
+ ") Executing operator \"" + this->op->m_op \
+ "\" with param " \
+ eparam \
+ " against " \
+ Variable::to_s(variables) + ".");
clock_t begin = clock();
#endif
std::vector<const collection::Variable *> Rule::getFinalVars(
Transaction *trasn) {
std::list<std::string> exclusions;
std::vector<Variable *> *variables = this->variables;
std::vector<const collection::Variable *> finalVars;
for (int i = 0; i < variables->size(); i++) {
Variable *variable = variables->at(i);
if (variable->m_isExclusion) {
@ -335,17 +394,16 @@ bool Rule::evaluate(Transaction *trasn) {
}
for (int i = 0; i < variables->size(); i++) {
int transformations = 0;
Variable *variable = variables->at(i);
std::vector<const collection::Variable *> e;
bool ignoreVariable = false;
if (variable->m_isExclusion) {
continue;
}
std::vector<const collection::Variable *> e;
variable->evaluateInternal(trasn, this, &e);
for (auto &v : e) {
bool ignoreVariable = false;
for (const collection::Variable *v : e) {
if (std::find(exclusions.begin(), exclusions.end(),
v->m_key) != exclusions.end()) {
#ifndef NO_LOGS
@ -371,6 +429,7 @@ bool Rule::evaluate(Transaction *trasn) {
if (ignoreVariable) {
continue;
}
for (auto &i : trasn->m_ruleRemoveTargetById) {
int id = i.first;
std::string args = i.second;
@ -388,253 +447,208 @@ bool Rule::evaluate(Transaction *trasn) {
continue;
}
std::string value = v->m_value;
int none = 0;
for (Action *a : this->actions_runtime_pre) {
if (a->m_isNone) {
none++;
}
}
finalVars.push_back(v);
}
}
return finalVars;
}
// Check for transformations on the SecDefaultAction
// Notice that first we make sure that won't be a t:none
// on the target rule.
if (none == 0) {
for (Action *a :
trasn->m_rules->defaultActions[this->phase]) {
if (a->action_kind ==
actions::Action::RunTimeBeforeMatchAttemptKind) {
value = a->evaluate(value, trasn);
#ifndef NO_LOGS
trasn->debug(9, "(SecDefaultAction) T (" + \
std::to_string(transformations) + ") " + \
a->m_name + ": \"" + \
utils::string::limitTo(80, value) +"\"");
#endif
transformations++;
}
}
}
for (Action *a : this->actions_runtime_pre) {
if (none == 0) {
value = a->evaluate(value, trasn);
#ifndef NO_LOGS
trasn->debug(9, " T (" + \
std::to_string(transformations) + ") " + \
a->m_name + ": \"" + \
utils::string::limitTo(80, value) + "\"");
#endif
transformations++;
}
if (a->m_isNone) {
none--;
}
}
void Rule::executeActionsAfterFullMatch(Transaction *trasn,
bool containsDisruptive, RuleMessage *ruleMessage) {
#ifndef NO_LOGS
trasn->debug(9, "Target value: \"" + utils::string::limitTo(80,
utils::string::toHexIfNeeded(value)) \
+ "\" (Variable: " + v->m_key + ")");
#endif
ret = this->op->evaluateInternal(trasn, this, value);
#ifndef NO_LOGS
clock_t end = clock();
double elapsed_secs = static_cast<double>(end - begin) \
/ CLOCKS_PER_SEC;
trasn->debug(4, "Operator completed in " + \
std::to_string(elapsed_secs) + " seconds");
#endif
if (ret) {
bool containsDisruptive = false;
bool chainResult = false;
bool containsPassAction = false;
globalRet = true;
if (this->op->m_match_message.empty() == true) {
ruleMessage->m_match = "Matched \"Operator `" +
this->op->m_op + "' with parameter `" +
utils::string::limitTo(200, this->op->m_param) +
"' against variable `" + v->m_key + "' (Value: `" +
utils::string::limitTo(100,
utils::string::toHexIfNeeded(value)) +
"' ) \" at " + v->m_key;
} else {
ruleMessage->m_match = this->op->m_match_message;
}
#ifndef NO_LOGS
trasn->debug(4, "Rule returned 1.");
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR",
value);
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR_NAME",
v->m_key);
trasn->m_collections.store("MATCHED_VARS:"
+ v->m_key, value);
trasn->m_collections.store("MATCHED_VARS_NAMES:"
+ v->m_key, v->m_key);
#endif
for (Action *a :
this->actions_runtime_pos) {
if (a->isDisruptive() == true) {
if (a->m_name == "pass") {
containsPassAction = true;
trasn->debug(4, "Rule contains a `pass' action");
} else {
containsDisruptive = true;
}
} else {
if (a->m_name == "setvar") {
trasn->debug(4, "Running [I] (_non_ disruptive) " \
"action: " + a->m_name);
a->evaluate(this, trasn, ruleMessage);
}
}
}
if (this->chained && this->chainedRule == NULL) {
#ifndef NO_LOGS
trasn->debug(4, "Rule is marked as chained but there " \
"isn't a subsequent rule.");
#endif
}
if (this->chained && this->chainedRule != NULL) {
#ifndef NO_LOGS
trasn->debug(4, "Executing chained rule.");
#endif
chainResult = this->chainedRule->evaluate(trasn);
}
if ((this->chained && chainResult == true) || !this->chained) {
for (Action *a :
trasn->m_rules->defaultActions[this->phase]) {
if (a->action_kind
== actions::Action::RunTimeOnlyIfMatchKind) {
if (a->isDisruptive()) {
if (containsDisruptive) {
#ifndef NO_LOGS
trasn->debug(4,
"(SecDefaultAction) _ignoring_ " \
"action: " + a->m_name + \
" (rule contains a disruptive action)");
#endif
} else {
if (trasn->m_rules->m_secRuleEngine
== Rules::EnabledRuleEngine) {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) " \
"Running action: " + a->m_name + \
" (rule _does not_ contains a " \
"disruptive action)");
#endif
a->evaluate(this, trasn, ruleMessage);
} else {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) " \
"_Not_ running action: " \
+ a->m_name + ". Rule _does not_" \
+ " contains a disruptive action,"\
+ " but SecRuleEngine is not On.");
#endif
}
}
} else {
#ifndef NO_LOGS
trasn->debug(4, "(SecDefaultAction) Running " \
"action: " + a->m_name + "!!" \
+ std::to_string(a->isDisruptive()));
#endif
a->evaluate(this, trasn, ruleMessage);
}
}
}
for (Action *a :
this->actions_runtime_pos) {
if (a->isDisruptive()
&& trasn->m_rules->m_secRuleEngine
== Rules::EnabledRuleEngine
&& containsPassAction == false) {
#ifndef NO_LOGS
trasn->debug(4, "Running (disruptive) " \
"action: " + a->m_name);
#endif
a->evaluate(this, trasn);
} else if (a->isDisruptive()
&& containsPassAction == false) {
#ifndef NO_LOGS
trasn->debug(4,
"Not running disruptive action: " + \
a->m_name + ". SecRuleEngine " + \
"is not On");
#endif
} else if (a->isDisruptive() &&
containsPassAction == true) {
if (a->m_name != "pass") {
#ifndef NO_LOGS
trasn->debug(4, "Not running disruptive " \
"action: " + a->m_name + ". It was " \
"silenced by an `pass' action.");
#endif
}
} else if (!a->isDisruptive()) {
if (a->m_name != "capture" \
&& a->m_name != "setvar") {
#ifndef NO_LOGS
trasn->debug(4, "Running [II] " \
"(_non_ disruptive) " \
"action: " + a->m_name);
#endif
a->evaluate(this, trasn, ruleMessage);
}
}
}
}
} else if (globalRet != true) {
#ifndef NO_LOGS
trasn->debug(4, "Rule returned 0.");
trasn->m_collections.storeOrUpdateFirst("MATCHED_VAR", "");
trasn->m_collections.del("MATCHED_VARS:" + v->m_key);
trasn->m_collections.del("MATCHED_VARS_NAMES:" + v->m_key);
trasn->m_collections.del("MATCHED_VARS_NAME");
#endif
}
for (Action *a : trasn->m_rules->defaultActions[this->phase]) {
if (a->action_kind != actions::Action::RunTimeOnlyIfMatchKind) {
continue;
}
while (e.empty() == false) {
delete e.back();
e.pop_back();
if (a->isDisruptive() == false) {
trasn->debug(4, "(SecDefaultAction) Running " \
"action: " + a->m_name);
a->evaluate(this, trasn, ruleMessage);
continue;
}
if (containsDisruptive) {
trasn->debug(4, "(SecDefaultAction) _ignoring_ " \
"action: " + a->m_name + \
" (rule contains a disruptive action)");
continue;
}
if (trasn->m_rules->m_secRuleEngine == Rules::EnabledRuleEngine) {
trasn->debug(4, "(SecDefaultAction) " \
"Running action: " + a->m_name + \
" (rule _does not_ contains a " \
"disruptive action)");
a->evaluate(this, trasn, ruleMessage);
continue;
}
trasn->debug(4, "(SecDefaultAction) _Not_ running action: " \
+ a->m_name + ". Rule _does not_contains a disruptive action,"\
+ " but SecRuleEngine is not On.");
}
for (Action *a : this->m_actionsRuntimePos) {
if (a->isDisruptive() == false) {
if (a->m_name != "setvar" && a->m_name != "log"
&& a->m_name != "msg") {
trasn->debug(4, "Running [I] (_non_ disruptive) " \
"action: " + a->m_name);
a->evaluate(this, trasn, ruleMessage);
}
continue;
}
if (trasn->m_rules->m_secRuleEngine == Rules::EnabledRuleEngine) {
trasn->debug(4, "Running (disruptive) action: " + a->m_name);
a->evaluate(this, trasn, ruleMessage);
continue;
} else {
continue;
}
trasn->debug(4, "Not running disruptive action: " + \
a->m_name + ". SecRuleEngine is not On");
}
for (auto &z : ruleMessage->m_tmp_actions) {
trasn->m_actions.push_back(z);
}
}
bool Rule::evaluate(Transaction *trasn) {
bool isThisAChainedRule = rule_id == 0;
bool globalRet = false;
std::vector<Variable *> *variables = this->variables;
bool recursiveGlobalRet;
bool containsDisruptive = false;
RuleMessage ruleMessage(this);
trasn->m_matched.clear();
if (m_secmarker == true) {
return true;
}
if (m_unconditional == true) {
trasn->debug(4, "(Rule: " + std::to_string(rule_id) \
+ ") Executing unconditional rule...");
executeActionsIndependentOfChainedRuleResult(trasn,
&containsDisruptive, &ruleMessage);
executeActionsAfterFullMatch(trasn, false, &ruleMessage);
return true;
}
for (auto &i : trasn->m_ruleRemoveById) {
if (rule_id != i) {
continue;
}
trasn->debug(9, "Rule id: " + std::to_string(rule_id) +
" was skipped due to an ruleRemoveById action...");
return true;
}
std::string eparam = MacroExpansion::expand(this->op->m_param, trasn);
if (this->op->m_param != eparam) {
eparam = "\"" + eparam + "\" Was: \"" + this->op->m_param + "\"";
} else {
eparam = "\"" + eparam + "\"";
}
trasn->debug(4, "(Rule: " + std::to_string(rule_id) \
+ ") Executing operator \"" + this->op->m_op \
+ "\" with param " \
+ eparam \
+ " against " \
+ Variable::to_s(variables) + ".");
updateRulesVariable(trasn);
std::vector<const collection::Variable *> finalVars = getFinalVars(trasn);
for (const collection::Variable *v : finalVars) {
std::string value = v->m_value;
std::vector<std::string> values;
bool ret;
bool multiMatch = getActionsByName("multimatch").size() > 0;
values = executeSecDefaultActionTransofrmations(trasn, value,
multiMatch);
for (const std::string &valueTemp : values) {
ret = executeOperatorAt(trasn, v->m_key, valueTemp);
if (ret == true) {
ruleMessage.m_match = resolveMatchMessage(v->m_key, value);
updateMatchedVars(trasn, v->m_key, value);
executeActionsIndependentOfChainedRuleResult(trasn,
&containsDisruptive, &ruleMessage);
std::string msg2save = ruleMessage.errorLog(trasn);
if (ruleMessage.m_message.empty() == false) {
trasn->debug(4, "Scheduled to be saved on the server " +
"log: " + msg2save + "");
ruleMessage.m_server_logs.push_back(msg2save);
}
globalRet = true;
}
}
}
if (globalRet == true && rule_id != 0
&& ruleMessage->m_saveMessage == true) {
ruleMessage->m_message = m_log_message;
trasn->debug(4, "Saving on the server log: "
+ ruleMessage->errorLog(trasn));
trasn->serverLog(ruleMessage->errorLog(trasn));
if (globalRet == false) {
trasn->debug(4, "Rule returned 0.");
cleanMatchedVars(trasn);
return false;
}
delete ruleMessage;
return globalRet;
trasn->debug(4, "Rule returned 1.");
if (this->chained == false) {
executeActionsAfterFullMatch(trasn, containsDisruptive, &ruleMessage);
trasn->debug(4, "Merging temporary actions to the main transaction.");
for (const auto &u : ruleMessage.m_server_logs) {
trasn->debug(8, "To save: " + u);
trasn->serverLog(u);
}
return true;
}
if (this->chainedRule == NULL) {
trasn->debug(4, "Rule is marked as chained but there " \
"isn't a subsequent rule.");
return false;
}
trasn->debug(4, "Executing chained rule.");
recursiveGlobalRet = this->chainedRule->evaluate(trasn);
if (recursiveGlobalRet == true) {
executeActionsAfterFullMatch(trasn, containsDisruptive, &ruleMessage);
trasn->debug(4, "Merging temporary actions to the main transaction.");
for (const auto &u : ruleMessage.m_server_logs) {
trasn->serverLog(u);
}
return true;
}
return false;
}
std::vector<actions::Action *> Rule::getActionsByName(const std::string& name) {
std::vector<actions::Action *> ret;
for (auto &z : this->actions_runtime_pos) {
for (auto &z : m_actionsRuntimePos) {
if (z->m_name == name) {
ret.push_back(z);
}
}
for (auto &z : this->actions_runtime_pre) {
for (auto &z : m_actionsRuntimePre) {
if (z->m_name == name) {
ret.push_back(z);
}
}
for (auto &z : this->actions_conf) {
for (auto &z : m_actionsConf) {
if (z->m_name == name) {
ret.push_back(z);
}
@ -645,7 +659,7 @@ std::vector<actions::Action *> Rule::getActionsByName(const std::string& name) {
bool Rule::containsTag(const std::string& name, Transaction *t) {
std::vector<std::string *> ret;
for (auto &z : this->actions_runtime_pos) {
for (auto &z : this->m_actionsRuntimePos) {
actions::Tag *tag = dynamic_cast<actions::Tag *> (z);
if (tag != NULL && tag->getName(t) == name) {
return true;
@ -654,4 +668,5 @@ bool Rule::containsTag(const std::string& name, Transaction *t) {
return false;
}
} // namespace modsecurity

View File

@ -53,57 +53,7 @@ namespace Variables {
void Rule::evaluateInternal(Transaction *t,
modsecurity::Rule *rule,
std::vector<const collection::Variable *> *l) {
std::map<std::string, std::string> envs;
std::string m_name_upper = utils::string::toupper(m_name);
// id
envs.insert(std::pair<std::string, std::string>("RULE:id",
std::to_string(rule->rule_id)));
// rev
envs.insert(std::pair<std::string, std::string>("RULE:rev",
rule->m_rev));
// severity
std::vector<actions::Action *> acts = rule->getActionsByName("severity");
for (actions::Action *i : acts) {
actions::Severity *a = reinterpret_cast<actions::Severity *>(i);
if (a) {
envs.insert(std::pair<std::string, std::string>("RULE:severity",
std::to_string(a->m_severity)));
}
}
// logdata
acts = rule->getActionsByName("logdata");
for (actions::Action *i : acts) {
actions::LogData *a = reinterpret_cast<actions::LogData *>(i);
if (a) {
envs.insert(std::pair<std::string, std::string>("RULE:logdata",
a->data(t)));
}
}
// msg
acts = rule->getActionsByName("msg");
for (actions::Action *i : acts) {
actions::Msg *a = reinterpret_cast<actions::Msg *>(i);
if (a) {
std::string data = a->data(t);
envs.insert(std::pair<std::string, std::string>("RULE:msg",
data));
}
}
for (auto& x : envs) {
std::string xup = utils::string::toupper(x.first);
if ((xup.substr(0, m_name_upper.size() + 1)
.compare(m_name_upper + ":") != 0)
&& (xup != m_name_upper)) {
continue;
}
l->push_back(new collection::Variable(x.first, x.second));
}
// Variable rule is now being saved as part of the transient collection.
}
} // namespace Variables