Universal SafetyNet Fix

Universal fix for SafetyNet on devices with hardware-backed attestation and unlocked bootloaders.

This module works around hardware attestation and recent updates to SafetyNet CTS profile checks. However, you must be able to pass basic (i.e. non-hardware) attestation, which requires a valid combination of device and model names, build fingerprints, and security patch levels. Thus, MagiskHide is required.

If you have trouble passing basic attestation after installing this module, use MagiskHide Props Config to spoof your CTS profile. This is a common issue on old devices, custom ROMs, and stock ROMs without GMS certification (e.g. Chinese ROMs).

Android versions 8–12 are supported, including OEM skins such as Samsung One UI and MIUI. This module requires Zygisk (for Magisk Canary) or Riru (for stable Magisk).

Installation

The module must be installed using Magisk Manager, not TWRP or any other custom recovery.

Always make sure you have the latest version of the module installed before reporting any issues.

Zygisk

If you are using Magisk Canary, you need the Zygisk version of this module. Download and install the latest Zygisk version of this module from GitHub Releases.

Riru

If you are using stable Magisk, you need the Riru version of this module. Download and install the latest Riru version of this module from GitHub Releases. You will also need to install "Riru" through Magisk Manager.

How does it work?

Google Play Services opportunistically uses hardware-backed attestation to enforce SafetyNet security (since January 12, 2021), and enforces its usage based on the device model name (since September 2, 2021).

This module uses Riru to inject code into the Google Play Services process and then register a fake keystore provider that overrides the real one. When Play Services attempts to use key attestation, it throws an exception and pretends that the device lacks support for key attestation. This causes SafetyNet to fall back to basic attestation, which is much weaker and can be bypassed with existing methods.

However, blocking key attestation alone does not suffice because basic attestation fails on devices that are known by Google to support hardware-backed attestation. This module bypasses the check by appending a space character to the device model name. This has minimal impact on UX when only applied to Google Play Services, but it's sufficient for bypassing enforcement of hardware-backed attestation.

Unlike many other approaches, this doesn't break other features because key attestation is only blocked for Google Play Services, and even within Play Services, it is only blocked for SafetyNet code. As a result, other attestation-based features (such as using the device as a security key) will still work.

ROM integration

Ideally, this workaround should be incorporated in custom ROMs instead of injecting code with a Magisk module. See the ProtonAOSP website for more information.

Support

If you found this module helpful, please consider supporting development with a recurring donation on Patreon for benefits such as exclusive behind-the-scenes development news, early access to updates, and priority support. Alternatively, you can also buy me a coffee. All support is appreciated.