Bugsec and Cynet researchers have discovered a vulnerability in LG Android phones' pre-installed notification application that allows an attacker to run arbitrary JavaScript code on the devices.

The "SNAP" bug, as researchers have dubbed it, takes advantage of the fact that the Smart Notice app doesn't validate the information it presents to the user. Via the birthday notification or callback reminder functions, researchers were able to add a new contact to the device's contact list -- a malicious contact, with a script embedded.

Using this method, researchers say they could lift data, force the user to malicious websites, or make the phone "go crazy," getting it stuck in an infinite loop until a hard reset. See the research teams' demo for more.