Beta - SQL DB Instance With External Scripts Enabled

• Query id: 1c329b9b-8221-4b55-8d5f-f0959faf9cee
• Query name: Beta - SQL DB Instance With External Scripts Enabled
• Platform: Terraform
• Severity: High
• Category: Insecure Configurations
• CWE: 94
• Risk score: 6.0
• URL: Github

Description

All 'google_sql_database_instance' resources based on SQLSERVER should enable the 'external scripts enabled' flag to 'off' to prevent malicious code injection attempts
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - tf file

resource "google_sql_database_instance" "positive_1" {
  name             = "sqlserver-instance-with-flag"
  database_version = "SQLSERVER_2017_EXPRESS"
  region           = "us-central1"

  settings {
    database_flags {
      name = "sample_flag1"
      value = "off"
      }

    database_flags {                                  # Flag is not set to "off"
      name = "external scripts enabled"
      value = "on"
      }

    database_flags {
      name = "sample_flag2"
      value = "off"
      }
  }
}

resource "google_sql_database_instance" "positive_2" { # Single object support test
  name             = "sqlserver-instance-with-flag"
  database_version = "SQLSERVER_2017_EXPRESS"
  region           = "us-central1"

  settings {
    database_flags {
      name = "external scripts enabled"
      value = "on"
      }  # Flag is not set to "off"
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "google_sql_database_instance" "negative_1" {
  name             = "main-instance"
  database_version = "MYSQL_8_0"      # Is not a SQLSERVER instance
  region           = "us-central1"

  settings {
    tier = "db-f1-micro"

    database_flags {
      name = "external scripts enabled"
      value = "on"
      }
  }
}

resource "google_sql_database_instance" "negative_2" {
  name             = "mysql-instance-without-flag"
  database_version = "SQLSERVER_2017_STANDARD"
  region           = "us-central1"

  # Defaults to "off"
}

resource "google_sql_database_instance" "negative_3" {
  name             = "sqlserver-instance-without-flag"
  database_version = "SQLSERVER_2017_STANDARD"
  region           = "us-central1"

  settings {}  # Defaults to "off"
}

resource "google_sql_database_instance" "negative_4" {
  name             = "sqlserver-instance-without-flag"
  database_version = "SQLSERVER_2017_STANDARD"
  region           = "us-central1"

  settings {
    database_flags {
      name = "sample_flag1"
      value = "off"
      }
      # Defaults to "off"
  }
}

resource "google_sql_database_instance" "negative_5" {
  name             = "mysql-instance-with-flag"
  database_version = "SQLSERVER_2019_STANDARD"
  region           = "us-central1"

  settings {
    tier = "db-f1-micro"

    database_flags {
      name = "sample_flag1"
      value = "off"
      }

    database_flags {                                  # Has flag set to "off"
      name = "external scripts enabled"
      value = "off"
      }

    database_flags {
      name = "sample_flag2"
      value = "off"
      }
  }
}

resource "google_sql_database_instance" "negative_6" { # Single object support test
  name             = "mysql-instance-with-flag"
  database_version = "SQLSERVER_2019_STANDARD"
  region           = "us-central1"

  settings {
    tier = "db-f1-micro"

    database_flags {
      name = "external scripts enabled"
      value = "off"
      }   # Has flag set to "off"
  }
}