macOS 10.13 Authentication Bypass Remote Check (CVE-2017-13872)

high Nessus Plugin ID 105003
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote host is affected by an authentication bypass vulnerability.

Description

The remote host is affected by an authentication bypass vulnerability.
A local attacker or a remote attacker with credentials for a standard user account has the ability to blank out the root account password.
This can allow an authenticated attacker to escalate privileges to root and execute commands and read files as a system administrator.
A remote attacker without credentials can set passwords on certain disabled accounts.

Note that if this plugin is successful, Nessus has set the password on the 'nobody' account to 'nessus', and you will need to reset this password/re-disable this account to clean up.

Solution

Apply Apple Security Update 2017-001.

See Also

https://support.apple.com/en-us/HT208315

http://www.nessus.org/u?2cf4b55a

http://www.nessus.org/u?9ff9ff45

http://www.nessus.org/u?1e5890f3

http://www.nessus.org/u?f367aab4

http://www.nessus.org/u?f9f9bbc3

Plugin Details

Severity: High

ID: 105003

File Name: macos_10_13_auth_bypass_remote_check.nasl

Version: 1.9

Type: remote

Family: Misc.

Published: 12/4/2017

Updated: 11/12/2019

Dependencies: ssh_detect.nasl

Risk Information

CVSS Score Source: CVE-2017-13872

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.7

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:F/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:apple:mac_os_x, cpe:/o:apple:macos

Excluded KB Items: global_settings/supplied_logins_only

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/29/2017

Vulnerability Publication Date: 11/28/2017

Exploitable With

Metasploit (Mac OS X Root Privilege Escalation)

Reference Information

CVE: CVE-2017-13872

BID: 101981