An issue was discovered in certain Apple products. macOS High Sierra before Security Update 2017-001 is affected. The issue involves the "Directory Utility" component. It allows attackers to obtain administrator access without a password via certain interactions involving entry of the root user name.
http://www.securityfocus.com/bid/101981
http://www.securitytracker.com/id/1039875
https://github.com/rapid7/metasploit-framework/pull/9302
https://objective-see.com/blog/blog_0x24.html
https://support.apple.com/HT208315
https://support.apple.com/HT208331
https://www.exploit-db.com/exploits/43201/
https://www.exploit-db.com/exploits/43248/
https://www.wired.com/story/macos-update-undoes-apple-root-bug-patch/
Source: MITRE
Published: 2017-11-29
Updated: 2017-12-30
Type: CWE-287
Base Score: 9.3
Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 8.6
Severity: HIGH
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.2
Severity: HIGH