Title

The Ubuntu operating system must require users to re-authenticate for privilege escalation and changing roles. (Cat II impact)

Discussion

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

Check Content

Verify that "/etc/sudoers" has no occurrences of "NOPASSWD" or "!authenticate". Check that 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/* %wheel ALL=(ALL) NOPASSWD: ALL If any occurrences of "NOPASSWD" or "!authenticate" return from the command, this is a finding.

Fix Text

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

Additional Identifiers

Rule ID: SV-90169r2_rule

Vulnerability ID: V-75489

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.