| name | cis-ubuntu2004-v300-5-2-5 |
| description | Ensure re-authentication for privilege escalation is not disabled globally |
| category | cis-iam |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","sudo"] |
| cis_id | 5.2.5 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure re-authentication for privilege escalation is not disabled globally (Automated)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The operating system must be configured so that users must re-authenticate 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
Verify the operating system requires users to re-authenticate for privilege escalation.
Check the configuration of the /etc/sudoers and /etc/sudoers.d/* files with the following command:
If any line is found with a !authenticate tag, refer to the remediation procedure below.
Expected Result
No output should be returned (no !authenticate entries found).
Remediation
Command Line
Configure the operating system to require users to reauthenticate for privilege escalation.
Based on the outcome of the audit procedure, use visudo -f <PATH TO FILE> to edit the relevant sudoers file.
Remove any occurrences of !authenticate tags in the file(s).
References
- NIST SP 800-53 Rev. 5: AC-6
CIS Controls
v8 - 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts
Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account.
v7 - 4.3 Ensure the Use of Dedicated Administrative Accounts
Ensure that all users with administrative account access use a dedicated or secondary account for elevated activities. This account should only be used for administrative activities and not internet browsing, email, or similar activities.
MITRE ATT&CK Mappings: T1548 | TA0004 | M1026
