Function app does not enforce HTTPS Affecting App Service (Web Apps) service in Azure
Severity Framework
CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Snyk CCSS
Rule category
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
Data/ Encryption in Transit
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CIS-ControlsCSA-CCMGDPRHIPAAISO-27001NIST-800-53PCI-DSSSOC-2
- Snyk IDSNYK-CC-00496
- creditSnyk Research Team
Description
Users can access the function app via HTTP, and the connection and transmitted data could be intercepted and manipulated.
How to fix?
Set httpsOnly attribute to true.
Set the https_only attribute to true.
Example configuration:
resource "azurerm_function_app" "allowed1" {
name = "fafordeflinux"
location = azurerm_resource_group.example496a.location
resource_group_name = azurerm_resource_group.example496a.name
app_service_plan_id = azurerm_app_service_plan.defaultasp1.id
storage_account_name = azurerm_storage_account.examplesa.name
storage_account_access_key = azurerm_storage_account.examplesa.primary_access_key
os_type = "linux"
https_only = true
}
resource "azurerm_linux_function_app" "allowed2" {
name = "examplelinfunapp"
resource_group_name = azurerm_resource_group.example496a.name
location = azurerm_resource_group.example496a.location
storage_account_name = azurerm_storage_account.examplesa.name
storage_account_access_key = azurerm_storage_account.examplesa.primary_access_key
service_plan_id = azurerm_service_plan.linasp.id
https_only = true
site_config {
}
}
resource "azurerm_windows_function_app" "allowed3" {
name = "examplewinfunapp"
resource_group_name = azurerm_resource_group.example496a.name
location = azurerm_resource_group.example496a.location
storage_account_name = azurerm_storage_account.examplesa.name
storage_account_access_key = azurerm_storage_account.examplesa.primary_access_key
service_plan_id = azurerm_service_plan.winasp.id
https_only = true
site_config {
}
}