Critical MacOS Security Update (Zero-Day exploit patch)

Greetings IT Pros,

There is currently an active zero-day exploit that takes advantage of file quarantine, gatekeeper, and notarization that could lead to users unintentionally running software that looks like harmless files. This exploit affects macOS versions 10.15 through macOS 11.2.3.

The IU Information Security team strongly recommends that you apply the macOS Security updates to your fleets immediately.

–IT Community Partnerships on behalf of the University Information Security Office

https://support.apple.com/en-us/HT212325

About the security content of macOS Big Sur 11.3

https://support.apple.com/en-us/HT212326

About the security content of Security Update 2021-002 Catalina

https://support.apple.com/en-us/HT212327

About the security content of Security Update 2021-003 Mojave

https://support.apple.com/en-us/HT212318

About the security content of Safari 14.1

For more information, here is a complete write-up of the known exploit.

https://objective-see.com/blog/blog_0x64.html