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Home > Cybersecurity > The details of a bug that lets bypassing security on macOS is shared

The details of a bug that lets bypassing security on macOS is shared

The bug which is fixed by Apple now was letting specially crafted malicious apps bypass Gatekeeper security.


Rusen Gobel Rusen Gobel
December 24, 2021
1 min read
The details of a bug that lets bypassing security on macOS have been shared

The giant tech company Apple, which is known for high-level security on its devices, has fixed a flaw back in September. The flaw which could be tracked as CVE-2021-30853 was letting the malicious scripts run in the system without alarming the Gatekeeper, macOS security app.

Gatekeeper just sleeps

The flaw was found and reported by Box Offensive Security Engineer Gordon Long. With this flaw, the Gatekeeper does not alarm if a script starts with a shebang (!#) character and leaves the rest of the line empty. Leaving this line empty leads the Unix shell to run the script without specifying a shell command interpreter.

macOS 11.6 update, released in September 2021, has fixed this issue. macOS 12 beta 6 is also safe. The users of older macOS versions should be aware since the bug is quite easy to exploit. The bug also has the potential to download and run even more dangerous malware, completely bypassing the Gatekeeper.

See more Cybersecurity News

A comprehensive guide to understanding Cybersecurity: What is Cybersecurity?


Tags: macOS
Rusen Gobel

Rusen Gobel

Rusen Gobel is the managing editor of Cloud7. With more than 10 years of experience, Rusen worked as a hardware and software news editor for technology sites such as ShiftDelete, Teknokulis, Hardware Plus, BT Haber. In addition, Rusen publishes consumer product reviews on his YouTube channel. While consumer electronics has been his main focus for years, now Rusen is more interested in WordPress and software development. He had contributed different web application projects in his professional career. Rusen had graduated from Istanbul University, department of Computer Engineering. Rusen has a very high passion for learning and writing for every kind of technology. That's why he has been working as a tech editor for more than ten years on several different technology magazines and online news portals.

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