The science behind this exploit is quite simple.. The web version of WhatsApp allows you to send up to 65,000 characters, but if you include a huge amount of emoji, as in this case more than 4,000, the is sent, but just blocking the application to overflow its buffer

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How this exploit

Although technically it should be possible to use this exploit from the mobile application in As you’ve included over a thousand emojis becomes very unstable and almost unmanageable, resulting almost impossible to send the message. It is much easier to get from the Web, which is using Indrajeet Bhuyan, its discoverer, in this video demonstration.

The video shows clearly how easy it is to use this exploit to block anyone’s conversation, as well as blocking both the application and the web version.

I just try, science, and the truth is it’s very easy block the application Mobile. In fact, in a telephone low or medium range it is likely to be sufficient with a much smaller amount of emojis. The web version, however, not locked me 4,000 emoji, so presumably it also depends on the power of the PC.

What to do if you receive a message like

If any of your contacts is so “nice” to use this technique against you and block you conversation WhatsApp, you have to do is delete the conversation without going to it.

In the application, go to the Chats, please click the malicious prolonged chat tab and finally select Delete chat. You can also try to remove it from the Web version of WhatsApp, it seems not be blocked with equal ease.

A year ago, WhatsApp corrected a similar error by limiting the maximum number of characters per message, but not the maximum of emojis you could insert. Presumably a forthcoming update of WhatsApp also enter a emoji limit per message to a reasonable figure

More information. | Hackatrick
In Engadget Android | ¿WhatsApp with video calls and eyelashes? This is suggested filtered images

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News You can block any WhatsApp 4,000 emojis was originally published at Engadget Android by Ivan Ramirez.

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