Control: 9.8 Ensure that 'Java version' is the latest, if used to run the web app

Description

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

Newer versions may contain security enhancements and additional functionality. With each software installation, organizations need to determine if a given update meets their requirements and also verify the compatibility and support provided for any additional software against the update revision that is selected.

Remediation

From Console

Perform the following action to check latest version installed:

1. Login to Azure Portal and go to App Services.
2. Click on each App.
3. Under Settings section, click on Configuration.
4. Go to General settings tab.
5. Under Stack settings, ensure Java version is set to latest version.

Note No action is required, If Stack is not using Java, as it is not used by your web app.

Perform the following action to install latest version:

1. Login to Azure Portal and go to App Services.
2. Click on each App.
3. Under Settings section, click on Configuration.
4. Go to General settings tab.
5. Under Stack settings, set Java version to the latest version.
6. Set Java minor version to latest version available.
7. Set Java web server to latest version available.
8. Set Java web server version to latest version available.
9. Click Save.

From Command Line

To see the list of supported runtimes:

az webapp list-runtimes | grep java

To set latest Java version for an existing app, run the following command:

az webapp config set --resource-group <RESOURCE_GROUP_NAME> --name <APP_NAME> --java-version '1.8' --java-container 'Tomcat' --java-container-version '<VERSION>'