Check: GEN003110
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE:
GEN003110
(in versions v1 r14 through v1 r10)
Title
Cron and crontab directories 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 cron and crontab directories may provide unauthorized access to these directories. Unauthorized modifications to these directories or their contents may result in the addition of unauthorized cron jobs or deny service to authorized cron jobs.
Check Content
Check the permissions of the crontab directories. # ls -lL /var/spool/cron/crontabs # aclget < crontab > # aclget /var/spool/cron Check if extended permissions are disabled. If extended permissions are not disabled, this is a finding.
Fix Text
Remove the extended ACL from the crontab file(s) and disable extended permissions. #acledit <directory>/<file>
Additional Identifiers
Rule ID: SV-39103r1_rule
Vulnerability ID: V-22387
Group Title: GEN003110
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 |