Apple High Sierra Uses a Passwordless Root Account

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Apple High Sierra Uses a Passwordless Root Account
Today, a security researcher twitted[1] about a dangerous behaviour he found in the Apple High Sierra operating system: It is possible to get administrator rights (the "root" account on UNIX) by connecting without a password. I was able to reproduce this behaviour on my MacBook running the latest OS X version. It appears that OS X is delivered with a passwordless root account. A quick fix is to create a password as soon as possible. Open a terminal and type the following command: $ sudo passwd root It's not clear if only High Sierra is affected or also older versions. We will update this post as soon as possible if required. [1] https://twitter.com/lemiorhan/status/935578694541770752 Xavier Mertens (@xme) ISC Handler - Freelance Security Consultant PGP Key I will be teaching next: Reverse-Engineering Malware: Malware Analysis Tools and Techniques - SANS Secure India 2021	Xme 590 Posts ISC Handler Nov 29th 2017
Thread locked Subscribe	Nov 29th 2017 3 years ago
I had previously enabled root (on a Macbook Pro) and set a password. This was before updating to High Sierra. In this case the previous root password was still in force after the update (fortunately).	Anonymous
Quote	Nov 29th 2017 3 years ago