Published: 2016/08/24  Last Updated: 2016/08/24

Information from aki-null

Vulnerability ID:JVN#94816361
Title:YoruFukurou (NightOwl) vulnerable to denial-of-service (DoS)

This is a statement from the vendor itself with no modification by JPCERT/CC.

The app may crash if it tries to render certain sequence of characters which include emoji skin tone modifiers.
The cause of the problem lies on a bug in CoreText API, which has been found on macOS 10.9.

The version 2.85 implements a workaround to remove emoji skin tone modifiers on operating systems without emoji skin tone modifier support.