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Mostrando SKILL.md
| name | cis-ubuntu2004-v300-5-2-6 |
| description | Ensure sudo authentication timeout is configured |
| category | cis-iam |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","sudo"] |
| cis_id | 5.2.6 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
sudo caches used credentials for a default of 5 minutes. This is for ease of use when there are multiple administrative tasks to perform. The timeout can be modified to suit local security policies.
A timeout value reduces the window of opportunity for unauthorized privileged sudo access.
Run the following command to verify the default sudo timeout is enabled and no greater than 15 minutes:
# sudo -V | grep "Authentication timestamp timeout:"
Example output:
Authentication timestamp timeout: 15.0 minutes
Verify timeout is not: a negative number (disabled), greater than 15 minutes, and follows local site policy.
Authentication timestamp timeout: 15.0 minutes
(or a value of 15 minutes or less, not negative/disabled)
15 minutes, or doesn't follow local site polity:
Run the visudo command and edit or add the following line:Defaults timestamp_timeout=<N>
Example:
Defaults timestamp_timeout=15
timestamp_timeout=15
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