TMA-SOLARIS-6.3
Restrict at/cron to Authorized Users
Description
The cron.allow and at.allow files contain a list of users who are allowed to run the crontab and at commands to submit jobs to be run at scheduled intervals. On many systems, only the system administrator needs the ability to schedule jobs. Even though a given user is not listed in cron.allow, cron jobs can still be run as that user. Audit: cron.deny and at.deny must be absent, cron.allow must list root, at.allow must exist and be empty.
How it is checked
Audit method: Shell command
r=compliant; [ -e /etc/cron.d/cron.deny ] && r="cron.deny exists"; [ -e /etc/cron.d/at.deny ] && r="at.deny exists"; grep -qx root /etc/cron.d/cron.allow 2>/dev/null || r="root not in cron.allow"; if [ -f /etc/cron.d/at.allow ]; then n=$(wc -l < /etc/cron.d/at.allow); [ "$n" -eq 0 ] || r="at.allow is not empty"; else r="at.allow missing"; fi; echo "$r"- Expected output
compliant
How it is fixed
Fix method: Guidance or infrastructure patch
Perform the following to implement the recommended state: # mv /etc/cron.deny /etc/cron.deny.cis # mv /etc/at.deny /etc/at.deny.cis # echo root > /etc/cron.allow # cp /dev/null at.allow # chown root:root cron.allow at.allow # chmod 400 cron.allow at.allow Note that the root/superuser is always allowed to use the at command and is not required to be specifically listed in at.allow.
Properties
- Operating systems
- Any
- Tags
- solarisaccounts
- Reference
- CIS Oracle Solaris 11.4 Benchmark v1.1.0 - 6.3 Restrict at/cron to Authorized Users
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target solaris