An application com.pri.applock, which is pre-loaded on Kruger&Matz smartphones, allows a user to encrypt any application using user-provided PIN code or by using biometric data. Exposed ”com.android.providers.settings.fingerprint.PriFpShareProvider“ content providers public method query() allows any other malicious application, without any granted Android system permissions, to exfiltrate the PIN code.
Only version (version name: 13, version code: 33) was tested and confirmed to have this vulnerability. Application update was released in April 2025.
The Android application exports a component for use by other applications, but does not properly restrict which applications can launch the component or access the data it contains.
The attacks and consequences of improperly exporting a component may depend on the exported component: