App Service Without Latest PHP Version

• Query id: 96fe318e-d631-4156-99fa-9080d57280ae
• Query name: App Service Without Latest PHP Version
• Platform: Terraform
• Severity: Low
• Category: Best Practices
• URL: Github

Description

Periodically newer versions are released for PHP software either due to security flaws or to include additional functionality. Using the latest PHP version for web apps is recommended in order to take advantage of security fixes, if any, and/or additional functionalities of the newer version.
Documentation

Code samples

Code samples with security vulnerabilities

Postitive test num. 1 - tf file

resource "azurerm_app_service" "example4" {
  name                = "example4-app-service"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  app_service_plan_id = azurerm_app_service_plan.example.id

  # SiteConfig block is optional before AzureRM version 3.0 
  site_config { 
    dotnet_framework_version = "v4.0"
    scm_type                 = "LocalGit"
    php_version              = "7.3"
  }

  app_settings = {
    "SOME_KEY" = "some-value"
  }

  connection_string {
    name  = "Database"
    type  = "SQLServer"
    value = "Server=some-server.mydomain.com;Integrated Security=SSPI"
  }
}

Postitive test num. 2 - tf file

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_service_plan" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  sku_name            = "P1v2"
}

resource "azurerm_windows_web_app" "example5" {
  name                = "example5"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

   site_config{
    application_stack{
      php_version = "v7.3"
    }    
  }
}

Postitive test num. 3 - tf file

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_service_plan" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  os_type             = "Linux"
  sku_name            = "P1v2"
}

resource "azurerm_linux_web_app" "example6" {
  name                = "example6"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

  site_config{
    application_stack{
      php_version = "7.4"
    }    
  }
}

Code samples without security vulnerabilities

Negative test num. 1 - tf file

resource "azurerm_app_service" "example1" {
  name                = "example1-app-service"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  app_service_plan_id = azurerm_app_service_plan.example.id

  # SiteConfig block is optional before AzureRM version 3.0 
  site_config {
    dotnet_framework_version = "v4.0"
    scm_type                 = "LocalGit"
    php_version              = "8.1"
  }

  app_settings = {
    "SOME_KEY" = "some-value"
  }

  connection_string {
    name  = "Database"
    type  = "SQLServer"
    value = "Server=some-server.mydomain.com;Integrated Security=SSPI"
  }
}

Negative test num. 2 - tf file

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_service_plan" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  sku_name            = "P1v2"
}

resource "azurerm_windows_web_app" "example2" {
  name                = "example2"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

   site_config{
    application_stack{
      php_version = "v8.1"
    }    
  }
}

Negative test num. 3 - tf file

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "West Europe"
}

resource "azurerm_service_plan" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_resource_group.example.location
  sku_name            = "P1v2"
}

resource "azurerm_linux_web_app" "example3" {
  name                = "example3"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

  site_config{
    application_stack{
      php_version = "8.1"
    }    
  }
}