Check: GEN003090
SUSE Linux Enterprise Server v11 for System z STIG:
GEN003090
(in versions v1 r12 through v1 r9)
Title
Crontab files must not have extended ACLs. (Cat II impact)
Discussion
To protect the integrity of scheduled system jobs and to prevent malicious modification to these jobs, crontab files must be secured. ACLs on crontab files may provide unauthorized access to the files.
Check Content
Check the permissions of the crontab files. Procedure: # ls -lL /var/spool/cron /var/spool/cron/tabs ls –lL /etc/crontab /etc/cron.{d,daily,hourly,monthly,weekly} or # ls -lL /etc/cron*|grep -v deny If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.
Fix Text
Remove the extended ACL from the file. # setfacl --remove-all [crontab file]
Additional Identifiers
Rule ID: SV-45601r1_rule
Vulnerability ID: V-22386
Group Title: GEN003090
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000225 |
The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions. |
Controls
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |