• Platform: Android
• Weakness: MASWE-0036
• Weakness in the numbering of the MASWE beta: MASWE-0053
• Profiles: L2 (advanced security)
• Type: static, code
• Knowledge: MASTG-KNOW-0055
• Best practices: MASTG-BEST-0019

Overview

This test verifies that the app appropriately configures text input fields to prevent the keyboard from caching sensitive information, such as passwords or personal data.

Android apps can configure the behavior of text input fields using:

• From layout files within the res/layout directory:
• Using the android:inputType XML attributes.
• Programmatically in the code:
• By calling the setInputType method on input fields and passing appropriate input type values.
• In Jetpack Compose, by using the KeyboardOptions constructors and setting the keyboardType and autoCorrect parameters.

See section "Non-Caching Input Types" in MASTG-KNOW-0055 for more details on the input types that prevent keyboard caching of sensitive information.

Steps

1. Use MASTG-TECH-0013 to reverse engineer the app.
2. Use MASTG-TECH-0014 to look for the relevant APIs.
3. Use MASTG-TECH-0007 to extract the layout files from the app package.

Observation

The output should include:

• All android:inputType XML attributes, if using XML for the UI.
• All calls to the setInputType method and the input type values passed to it.

Evaluation

The test case fails if there are any fields handling sensitive data for which the app does not use non-caching input types.

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