A 'Mailjack' bug on iOS 16 causes an iOS 16 application to crash after receiving a malicious message: here's what you should know

A 'Mailjack' bug on iOS 16 causes an iOS 16 application to crash after receiving a malicious message ...

An iOS 16 bug is reportedly causing the Mail application on iPhone and iPad models that have been upgraded to the latest version of Apple''s operating system to crash. The bug comes in the form of a rather routine-looking mail message, which includes additional characters, which causes the Mail application to crash on iOS 16. The bug has been dubbed Mailjack and allows anyone outsider to leave their email accounts without sending a modified email.

Equinux''s VPN Tracker identifies the crash-triggering email. Generally, the From field has the sender''s name followed by their email address from: ""@example.com. Mail services like Gmail, Outlook, and Hotmail automatically rewrite such inbound emails with unusual syntax to prevent such triggers.

As per the study, Gmail and Yahoo have filters in place to prevent these maliciously produced emails altogether. Despite the fact that Apple''s first-party iCloud Mail does not appear to have such rewriting or filtering capabilities.

The current method to avoid the trigger is to remove the message from the inbox or spam folder from a device that is running an older iOS version or via an external email client. Admins may also choose to move the trigger email to another subfolder on an IMAP email account. However, navigating to the respective subfolder will cause the application to crash again according to the website.

Equinux''s VPN Tracker has created a dedicated webpage where users may test the bug trigger by entering their email address. However, users may not try this technique as it may sabotage them out of their emails unless they have access to an older iOS or external email client to delete the trigger message.