| name | cis-azure-compute-2.2.3 |
| description | Ensure 'PHP version' is currently supported (if in use) |
| category | cis-azure-compute |
| version | 2.0.0 |
| author | cyberstrike-official |
| tags | ["cis","azure","app-service","deployment-slots","php","runtime-version","software-support"] |
| cis_id | 2.2.3 |
| cis_benchmark | CIS Microsoft Azure Compute Services Benchmark v2.0.0 |
| tech_stack | ["azure"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure 'PHP version' is currently supported (if in use)
Description
Periodically, older versions of PHP may be deprecated and no longer supported. Using a supported version of PHP for App Service deployment slots is recommended to avoid potential unpatched vulnerabilities.
Rationale
Deprecated and unsupported versions of programming and scripting languages can present vulnerabilities which may not be addressed or may not be addressable.
Impact
If your app is written using version-dependent features or libraries, they may not be available on more recent versions. If you wish to update, research the impact thoroughly.
Audit Procedure
Take note of the currently supported versions of PHP here:
https://www.php.net/supported-versions.php
Using Azure Portal
- Go to
App Services.
- Click the name of an app.
- Under
Deployment, click Deployment slots.
- Click the name of a deployment slot.
- Under
Settings, click Configuration.
- In the
General settings pane, ensure that for a Stack of PHP, the Major version and Minor version reflect a currently supported release.
- Repeat steps 1-6 for each app and deployment slot.
Using Azure CLI
Run the following command to list apps:
az webapp list
For each app, run the following command to list deployment slots:
az webapp deployment slot list --resource-group <resource-group-name> --name <app-name>
For each deployment slot, run the following command to get the PHP version:
az resource show --name web --resource-group <resource-group-name> --namespace Microsoft.Web --resource-type config --parent sites/<app-name>/slots/<deployment-slot-name> --query properties.[linuxFxVersion,phpVersion]
If PHP is in use, ensure the version is currently supported.
Expected Result
The PHP version configured for the deployment slot should be a currently supported release as listed on the PHP Supported Versions page.
Remediation
Note: No action is required if PHP is not in use.
Using Azure Portal
- Go to .