CVE-2019-15384

The Elephone A4 Android device with a build fingerprint of Elephone/A4/A4:8.1.0/O11019/20180530.143559:user/release-keys contains a pre-installed app with a package name of com.mediatek.wfo.impl app (versionCode=27, versionName=8.1.0) that allows any app co-located on the device to modify a system property through an exported interface without proper authorization.