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[yaffs-website] / web / modules / contrib / security_review / src / Checks / FailedLogins.php

diff --git a/web/modules/contrib/security_review/src/Checks/FailedLogins.php b/web/modules/contrib/security_review/src/Checks/FailedLogins.php
new file mode 100644 (file)
index 0000000..1286dfa
--- /dev/null
+++ b/web/modules/contrib/security_review/src/Checks/FailedLogins.php
@@ -0,0 +1,155 @@
+<?php
+
+namespace Drupal\security_review\Checks;
+
+use Drupal\Core\Logger\RfcLogLevel;
+use Drupal\security_review\Check;
+use Drupal\security_review\CheckResult;
+
+/**
+ * Checks for abundant failed logins.
+ */
+class FailedLogins extends Check {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getNamespace() {
+    return 'Security Review';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTitle() {
+    return 'Failed logins';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function run() {
+    // If dblog is not enabled return with hidden INFO.
+    if (!$this->moduleHandler()->moduleExists('dblog')) {
+      return $this->createResult(CheckResult::INFO, [], FALSE);
+    }
+
+    $result = CheckResult::SUCCESS;
+    $findings = [];
+    $last_result = $this->lastResult();
+    $visible = FALSE;
+
+    // Prepare the query.
+    $query = $this->database()->select('watchdog', 'w');
+    $query->fields('w', [
+      'severity',
+      'type',
+      'timestamp',
+      'message',
+      'variables',
+      'hostname',
+    ]);
+    $query->condition('type', 'user')
+      ->condition('severity', RfcLogLevel::NOTICE)
+      ->condition('message', 'Login attempt failed from %ip.');
+    if ($last_result instanceof CheckResult) {
+      // Only check entries that got recorded since the last run of the check.
+      $query->condition('timestamp', $last_result->time(), '>=');
+    }
+
+    // Execute the query.
+    $db_result = $query->execute();
+
+    // Count the number of failed logins per IP.
+    $entries = [];
+    foreach ($db_result as $row) {
+      $ip = unserialize($row->variables)['%ip'];
+      $entry_for_ip = &$entries[$ip];
+
+      if (!isset($entry_for_ip)) {
+        $entry_for_ip = 0;
+      }
+      $entry_for_ip++;
+    }
+
+    // Filter the IPs with more than 10 failed logins.
+    if (!empty($entries)) {
+      foreach ($entries as $ip => $count) {
+        if ($count > 10) {
+          $findings[] = $ip;
+        }
+      }
+    }
+
+    if (!empty($findings)) {
+      $result = CheckResult::FAIL;
+      $visible = TRUE;
+    }
+
+    return $this->createResult($result, $findings, $visible);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function help() {
+    $paragraphs = [];
+    $paragraphs[] = $this->t('Failed login attempts from the same IP may be an artifact of a malicious user attempting to brute-force their way onto your site as an authenticated user to carry out nefarious deeds.');
+
+    return [
+      '#theme' => 'check_help',
+      '#title' => $this->t('Abundant failed logins from the same IP'),
+      '#paragraphs' => $paragraphs,
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function evaluate(CheckResult $result) {
+    $findings = $result->findings();
+    if (empty($findings)) {
+      return [];
+    }
+
+    $paragraphs = [];
+    $paragraphs[] = $this->t('The following IPs were observed with an abundance of failed login attempts.');
+
+    return [
+      '#theme' => 'check_evaluation',
+      '#paragraphs' => $paragraphs,
+      '#items' => $result->findings(),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function evaluatePlain(CheckResult $result) {
+    $findings = $result->findings();
+    if (empty($findings)) {
+      return '';
+    }
+
+    $output = $this->t('Suspicious IP addresses:') . ":\n";
+    foreach ($findings as $ip) {
+      $output .= "\t" . $ip . "\n";
+    }
+
+    return $output;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMessage($result_const) {
+    switch ($result_const) {
+      case CheckResult::FAIL:
+        return $this->t('Failed login attempts from the same IP. These may be a brute-force attack to gain access to your site.');
+
+      default:
+        return $this->t('Unexpected result.');
+    }
+  }
+
+}