The Call Blocker application 6.6.3 for Android allows attackers to tamper with feature-related data, resulting in a severe elevation of privilege attack.

The Call Blocker application 6.6.3 for Android allows unauthorized applications to use exposed components to delete data stored in its database that is related to user privacy settings and affects the implementation of the normal functionality of the application. An attacker can use this to cause an escalation of privilege attack.

The Call Blocker application 6.6.3 for Android incorrectly opens a key component that an attacker can use to inject large amounts of dirty data into the application's database. When the application starts, it loads the data from the database into memory. Once the attacker injects too much data, the application triggers an OOM error and crashes, resulting in a persistent denial of service.