Booting Secure [on Apple systems]

PS: A few articles on the new T2 processor as well:

The MacBook Pro’s T2 chip boosts enterprise security: Secure boot, even for Windows installations on a Mac

Apple: new/updated T2 chip and Secure Boot support articles

Re: and

the latter Apple support article on Secure Boot has been updated recently:

About Secure Boot

Mac computers that have the Apple T2 chip

Apple releases new systems with T2 chip and UEFI SecureBoot

Apple macOS 10.13.6: UEFI SecureBoot support for iMac Pro

Re: and

there is more info on Apple Secure Boot:

Apple: periodic reminder: set your firmware password


What does NVRAM lock/unlock actually mean?

What does NVRAM lock/unlock actually mean

Jun 26, 2018

So, recently I’ve realized that meaning of “lock/unlock” in context of nvram on iOS is not understood correctly by many, so I’ve decieded to make a quick blog post on meaning of those words.[…]


Howard Oakley: Hidden caches in macOS: where your private data gets stored

Some time ago, I proposed that macOS 10.14 should be named Gormenghast, to reflect its many concealed and neglected features. These can trip up its own security and the protection of privacy when an old system within macOS is quietly storing sensitive data in an unprotected location. A good example is the latest vulnerability in QuickLook (or Quick Look, as Apple uses both forms).  Here is a brief overview of some of the potentially sensitive information which macOS secretes away in unexpected places. If you’re concerned about protecting the security of your data, these should be places to watch; if you’re a forensic analyst, these are often rewarding places to look.[…]

Hidden caches in macOS: where your private data gets stored

ApfsSupportPkg – Open source apfs.efi loader based on reverse-engineered Apple’s ApsfJumpStart driver

Apple has a new file system, APFS. This causes Hackintosh people lots of grief. There are lots of Apple APFS binaries online, and now there’s this:

Implementation of AppleLoadImage protocol discoverd in ApfsJumpStart Apple driver. This protocol installs in CoreDxe Apple’s firmware. Gives ability to use native ApfsJumpStart driver from Apple firmware

cugu for awesome research according APFS structure
CupertinoNet and Download-Fritz for Apple EFI reverse-engineering
vit9696 for codereview and support in the development

exploit_playground: overly-commented exploits (and Ian Beer’s getvolattrlist bug)

Personally I think the best way to learn a public exploit is by understanding it line-by-line until I can understand the exploit to the fullest. I will post some of these (overly-commented 😉 ) exploits so hopefully others can learn from it, and as an attempt to give something back to the community. Also for documenting purposes, cause these things kind of fade away from my head as time passes.



Un-Sexy Headline: USB Restricted Mode Will Improve iPhone User Security

By Riana Pfefferkorn on June 14, 2018 at 4:01 pm

In the upcoming version of the Apple iPhone iOS operating system, iOS 12, the phone’s Lightning cable port (used for charging and data transmission) will be disabled an hour after the phone is locked. The device will still charge, but transferring data to or from the device via the Lightning cable will require entering the device’s password first. Connecting to the data port via Lightning cable is what third-party forensic devices called Cellebrite and GrayKey rely upon to extract data from locked, encrypted iPhones. These tools (made, respectively, by the eponymous Cellebrite and a company called Grayshift) are employed by U.S. law enforcement agencies at federal, state, and local levels. Unsurprisingly, just about everybody covering the story is framing Apple’s move as one that will thwart law enforcement.[…]

Apple fixed firmware vulnerability found by Positive Technologies

June 14, 2018
The vulnerability allowed exploiting a critical flaw in Intel Management Engine and still can be present in equipment of vendors that use Intel processors. Apple released an update for macOS High Sierra 10.13.4, which fixes the firmware vulnerability CVE-2018-4251 found by Positive Technologies experts Maxim Goryachy and Mark Ermolov. For more details, see Apple Support.[…]