Whatsapp Crash
Whatsapp Crash V2 - crashing PC browser and mobile app
Last year I together with my friend Sourav Kar made the world's smallest code which could crash whatsapp. In a video demonstration, we have showed that how a 2000 words (2kb in size) message in special character set can crash Whatsapp messenger app. Previous it was discovered that sending a huge message ( greater than 7mb in size) on Whatsapp could crash victim device and app immediately, but using this new exploit an attacker only need to send a very small size (approx 2kb) message to the victim.
https://goo.gl/TvGOjk
The main impact of the vulnerability was that the user who received the specially crafted message had to delete his/her whole conversation and start a fresh chat, because opening the message keeps on crashing WhatsApp unless the chat is deleted completely. The exploit risked more than 500 million users worldwide. We reported the flaw and it was fixed in the next update.
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