A newly discovered iOS bug lets an attacker construct a simple text message which,Dear Utol (2025): Doctor, Doctor I'm Sick Episode 41 when sent to an iPhone, immediately freezes and possibly restarts it.
Software developer Abraham Masri has identified the bug and christened it chaiOS (which we must admit is a pretty awesome name). Masri told BuzzFeed, who first wrote about the bug, that he found it while “fuzzing with the operating system.”
An Apple spokesperson confirmed to Mashable "a fix is coming in a software update next week."
SEE ALSO: When you absolutely should not upgrade your iPhoneThe attack is quite nasty: According to Twitter user @aaronp613 who tested it out on an iPhone 5S and an iPhone X, not only does it render an iPhone unusable for a few minutes, but the recipient's Message app will stop loading messages and will keep crashing. It affects iOS versions 10 to 11.2.5 beta 5, but it hasn't been tested on the latest iOS beta, 11.2.5 beta 6. And Masri claims the same bug can also affects Macs.
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On the other hand, some users say the text message did nothing to their iPhones.
Note that the link Masri originally used (as seen in the above tweet) no longer works, and Masri said he will not upload it, so we haven't been able to independently verify Masri's results. However, now that the vulnerability is out, it's a matter of time before someone else figures out how to exploit it.
That said, there's an easy way to protect yourself. As Twitter user Eric Ramírez points out, you can simply block the domain of the message in Safari -- in the case of the original message, github.io. If you're not a developer, that's a good idea anyway since GitHub links could contain malicious code.
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This is just one of many simple text message based bugs that can wreak havoc on an iPhone. In Jan. 2017, it was discovered that a combination of three emoji can crash and freeze an iPhone. In Nov. 2016, it was a short video file that crashed iPhones, and in Mar. 2016 a simple link would crash iOS devices when tapped on in Safari. All these issues were subsequently fixed with software updates.
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