The Ubuntu operating system must require users to reauthenticate for privilege escalation or when changing roles.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-238208	UBTU-20-010014	SV-238208r1101674_rule		Medium

Description

Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157

STIG	Date
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide	2025-05-16

Details

Check Text (C-41418r1101672_chk)

Verify the "/etc/sudoers" file has no occurrences of "!authenticate" by running the following command:

$ sudo egrep -iR '!authenticate' /etc/sudoers /etc/sudoers.d/

If any occurrences of "!authenticate" return from the command, this is a finding.

Fix Text (F-41377r1101673_fix)

Remove any occurrence of "!authenticate" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory.