Title

Ubuntu OS must require users to reauthenticate for privilege escalation or when changing roles. (Cat II impact)

Discussion

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, SRG-OS-000373-GPOS-00158

Check Content

Verify the "/etc/sudoers" file has no occurrences of "NOPASSWD" or "!authenticate" by using the following command: $ sudo grep -Ei '(nopasswd|!authenticate)' /etc/sudoers /etc/sudoers.d/* 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-275647r1147991_rule

Vulnerability ID: V-275647

Group Title: SRG-OS-000373-GPOS-00156

Expert Comments

CCIs tied to check.

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