In Android versions prior to 5.0 and possibly greater than and equal to 4.0, Settings application leaks Pendingintent with a blank base intent (neither the component nor the action is explicitly set) to third party applications. Due to this, a malicious app can use this to broadcast intent with the same permissions and identity of the Settings application, which runs as SYSTEM uid.
cfc2aeebb8ce7b28e800f8cd2c1a2ef4f012afd9da67892dea7842b3fef42e7c