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


Finding ID Version Rule ID IA Controls Severity
V-238208 UBTU-20-010014 SV-238208r853405_rule Medium
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
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide 2022-12-06


Check Text ( C-41418r653797_chk )
Verify the "/etc/sudoers" file has no occurrences of "NOPASSWD" or "!authenticate" by running the following command:

$ sudo egrep -i '(nopasswd|!authenticate)' /etc/sudoers /etc/sudoers.d/*

If any occurrences of "NOPASSWD" or "!authenticate" return from the command, this is a finding.
Fix Text (F-41377r653798_fix)
Remove any occurrence of "NOPASSWD" or "!authenticate" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory.