PKGS-7370: debsums cron check does not examine /etc/crontab or /var/spool/cron/crontabs/root

[moerkey]

Describe the bug
The current check for existing cronjobs only examines those delivered with the package. However, I manage my own cronjobs through /etc/crontab, /var/spool/cron/crontabs/root, or /etc/cron.d/. Could be related to #1275.

Version

• Ubuntu 22.04
• Lynis version 3.1.2-100

Expected behavior
I suggest that the check be updated to include these custom cronjob files for a more comprehensive assessment.

Output

2024-10-10 20:13:21 Performing test ID PKGS-7370 (Checking for debsums utility)
2024-10-10 20:13:21 Result: debsums utility is installed
2024-10-10 20:13:21 Hardening: assigned maximum number of hardening points for this item (1). Currently having 107 points (out of 124)
2024-10-10 20:13:21 Result: Cron job is not configured for debsums utility.
2024-10-10 20:13:21 Hardening: assigned partial number of hardening points (1 of 3). Currently having 108 points (out of 127)
2024-10-10 20:13:21 Suggestion: Check debsums configuration and enable checking regularly via a cron job (CRON_CHECK in default file). [test:P
KGS-7370] [details:-] [solution:-]

Additional context
Thank you for your work on Lynis!