| name | cis-ubuntu1804-v220-4-3-4 |
| description | Ensure users must provide password for privilege escalation |
| category | cis-iam |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","sudo","privilege-escalation"] |
| cis_id | 4.3.4 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 - Control 4.3.4
Profile Applicability
- Level 2 - Server
- Level 2 - Workstation
Description
The operating system must be configured so that users must provide a password for privilege escalation.
Rationale
Without re-authentication, 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 re-authenticate.
Audit Procedure
Command Line
Run the following commands to verify that no lines include NOPASSWD:
grep -r "NOPASSWD" /etc/sudoers /etc/sudoers.d/
Expected Result
Nothing should be returned. If output is returned, it means a user can execute sudo commands without a password.
Remediation
Command Line
Remove any line from /etc/sudoers or files in /etc/sudoers.d/ that include NOPASSWD.
Use visudo to edit the files:
visudo
visudo -f /etc/sudoers.d/<filename>
References
- NIST SP 800-53 Rev. 5: IA-11
CIS Controls
v8 - 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts.
v7 - 4.3 Ensure the Use of Dedicated Administrative Accounts.
Profile Applicability
- Level 2 - Server
- Level 2 - Workstation
Assessment Status
Automated
