Prior to v66.0.0.733.524 of Meta Horizon OS, OVRMediaService could be induced to send a privileged PendingIntent including a com.oculus.horizon CallerIdentity to an arbitrary application registering for com.oculus.systemactivities.SCREENSHOT via a broadcast receiver. That would allow the application to impersonate the com.oculus.horizon package towards any endpoint within the OS that uses CallerIdentity authentication.

Prior to v74.0.0.878.1682 of Meta Horizon OS, MediaSyncJobReceiver could be induced to send a privileged PendingIntent including a com.oculus.vrshell CallerIdentity to an arbitrary application listening via NotificationListenerService. That would allow the application to impersonate the com.oculus.vrshell package, as well as packages signed with the same key, towards any endpoint within the OS that uses CallerIdentity authentication.