# Cis Azure Compute 2.2.2

> Ensure 'Python version' is currently supported (if in use)

- Skill: `cyberstrikeus/cis-azure-compute-2-2-2` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-azure-compute-2-2-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-azure-compute-2-2-2/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-azure-compute-2-2-2

---


# Ensure 'Python version' is currently supported (if in use)

## Description

Periodically, older versions of Python may be deprecated and no longer supported. Using a supported version of Python 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 (given a status of "security") of Python here:
https://devguide.python.org/versions/

### Using Azure Portal

1. Go to `App Services`.
2. Click the name of an app.
3. Under `Deployment`, click `Deployment slots`.
4. Click the name of a deployment slot.
5. Under `Settings`, click `Configuration`.
6. In the `General settings` pane, ensure that for a `Stack` of `Python`, the `Major version` and `Minor version` reflect a currently supported release.
7. Repeat steps 1-6 for each app and deployment slot.

### Using Azure CLI

Run the following command to list apps:

```bash
az webapp list
```

For each app, run the following command to list deployment slots:

```bash
az webapp deployment slot list --resource-group <resource-group-name> --name <app-name>
```

For each deployment slot, run the following command to get the Python version:

```bash
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,pythonVersion,windowsFxVersion]
```

If Python is in use, ensure the version is currently supported.

## Expected Result

The Python version configured for the deployment slot should be a currently supported release as listed on the Python Developer's Guide versions page with a status of "security" or higher.

## Remediation

**Note:** No action is required if Python is not in use.

### Using Azure Portal

1. Go to `App Services`.
2. Click the name of an app.
3. Under `Deployment`, click `Deployment slots`.
4. Click the name of a deployment slot.
5. Under `Settings`, click `Configuration`.
6. In the `General settings` pane, for a `Stack` of `Python`, set the `Major version` and `Minor version` to a currently supported release.
7. Click `Save`.
8. Click `Continue`.
9. Repeat steps 1-8 for each app and deployment slot requiring remediation.

### Using Azure CLI

Run the following command to list supported runtimes:

```bash
az webapp list-runtimes
```

For each deployment slot requiring remediation, run the following command with the appropriate parameters to update the Python version:

```bash
az resource update --name web --resource-group <resource-group-name> --namespace Microsoft.Web --resource-type config --parent sites/<app-name>/slots/<deployment-slot-name> --set properties.[linuxFxVersion|windowsFxVersion]="PYTHON|<python-version>"
```

## Default Value

The version is selected during creation.

## References

1. https://learn.microsoft.com/en-us/azure/app-service/configure-common#configure-language-stack-settings
2. https://learn.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-posture-vulnerability-management#pv-7-rapidly-and-automatically-remediate-software-vulnerabilities
3. https://learn.microsoft.com/en-us/security/benchmark/azure/security-controls-v3-posture-vulnerability-management#pv-3-establish-secure-configurations-for-compute-resources
4. https://devguide.python.org/versions/
5. https://learn.microsoft.com/en-us/cli/azure/webapp
6. https://learn.microsoft.com/en-us/cli/azure/resource

## Profile

Level 1 | Manual