Vulnerability Discussion

Without re-authentication, users may access resources or perform tasks for which they do not have authorization.

When the Ubuntu operating system provides 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

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/*

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

Fix

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