- Platform: Android
- Weakness: MASWE-0020
- Weakness in the numbering of the MASWE beta: MASWE-0044
- Profiles: L2 (advanced security)
- Type: static, code
- APIs:
BiometricPrompt.PromptInfo.Builder,setConfirmationRequired - Knowledge: MASTG-KNOW-0001
- Best practices: MASTG-BEST-0038
Overview
This test checks if the app enforces biometric authentication (MASTG-KNOW-0001) without requiring explicit user action. When using android.hardware.biometrics.BiometricPrompt API (or its Jetpack counterpart androidx.biometric.BiometricPrompt that backward compatibility to API level 23), the setConfirmationRequired()) method in BiometricPrompt.Builder controls whether the user must explicitly confirm their authentication, which is enforced by default.
Steps
- Use MASTG-TECH-0013 to reverse engineer the app.
- Use MASTG-TECH-0014 to look for the relevant APIs.
Observation
The output should include a list of locations where the relevant APIs are used.
Evaluation
The test case fails if the app sets setConfirmationRequired() to false for sensitive operations that require explicit user authorization.
Note
Using
setConfirmationRequired(false)is not inherently a vulnerability. It may be appropriate for low-risk operations, but for sensitive operations like payments or data access, the app should usesetConfirmationRequired(true)or rely on the default behavior to ensure the user explicitly confirms the authentication.
Powiązane zgłoszenia
| Typ powiązania | Zgłoszenie |
|---|---|
| is related to | MASTG-BEST-0038 Require Explicit User Confirmation for Biometric Authentication (Android) |
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