| name | cis-azure-compute-2.1.5 |
| description | Ensure 'FTP State' is set to 'FTPS only' or 'Disabled' |
| category | cis-azure-compute |
| version | 2.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","app-service","ftp","ftps","encryption","data-in-transit"] |
| cis_id | 2.1.5 |
| cis_benchmark | CIS Microsoft Azure Compute Services Benchmark v2.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure 'FTP State' is set to 'FTPS only' or 'Disabled'
Description
By default, App Service supports deployment over FTP. If FTP is essential for a deployment workflow, FTPS should be enforced for all App Service apps.
If FTPS is not explicitly required, the recommended setting is Disabled.
Rationale
FTP is an unencrypted network protocol that transmits data -- including passwords -- in clear text. The use of this protocol can lead to both data and credential compromise and can present opportunities for exfiltration, persistence, and lateral movement.
Impact
Deployment workflows that rely on FTP or FTPS rather than WebDeploy or HTTPS endpoints may be affected.
Audit Procedure
Using Azure Portal
- Go to the Azure Portal
- Select
App Services
- Click on an app
- Select
Settings and then Configuration
- Under
General Settings, for the Platform Settings, the FTP state should not be set to All allowed
Using Azure CLI
List webapps to obtain the ids:
az webapp list
List the publish profiles to obtain the username, password, and ftp server url:
az webapp deployment list-publishing-profiles --ids <ids>
Using Azure PowerShell
List all Web Apps:
Get-AzWebApp
For each app:
Get-AzWebApp -ResourceGroupName <resource group name> -Name <app name> | Select-Object -ExpandProperty SiteConfig
In the output, look for the value of FtpsState. If its value is AllAllowed the setting is out of compliance. Any other value is considered in compliance with this check.
Expected Result
FTP state should be set to FtpsOnly or Disabled, not AllAllowed.
Remediation
Using Azure Portal
- Go to the Azure Portal
- Select
App Services
- Click on an app
- Select
Settings and then Configuration
- Under
General Settings, for the Platform Settings, the should be set to or