This is how you can crash your friend’s WhatApp just by sending smileys
Whatsapp your friend with a message containing nearly 4000 smileys and the friend will suffer with a crash everytime s/he opens the message.
After this discovery, the company patched the bug by setting up the limits of characters in WhatsApp text messages, but unfortunately, it failed to set up limits for smileys send via WhatsApp.
“In WhatsApp Web, Whatsapp allows 65500-6600 characters, but after typing about 4200-4400 smiley browser starts to slow down,” Bhuyan wrote in his blog post. “But since the limit is not yet reached so WhatsApp allows to go on inserting…when it receives it overflows the buffer and it crashes.”
The recent bug tested on Android devices by multiple brands and caused the WhatsApp to crash. WhatsApp for Android devices including Marshmallow, Lollipop and Kitkat and
WhatsApp Web for Chrome, Opera and Firefox web browsers are affected by this bug.
There is a PoC video demonstration too and you can watch that here:
The best way to protect yourself is deletion of conversation when such message is received. If you become a victim of such message on WhatsApp, just open your messenger and delete the whole conversation with the sender.
However, remember, if you have kept some records of your chat with that particular friend, you’ll end up losing them all.
This trick will be famous and users will be vulnerable until a patch is released by the Facebook Inc.