"At" jobs must not set the umask to a value less restrictive than 077.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4366	GEN003440	SV-4366r2_rule	ECCD-1 ECCD-2	Medium

Description
The umask controls the default access mode assigned to newly created files. An umask of 077 limits new files to mode 700 or less permissive. Although umask is often represented as a 4-digit number, the first digit representing special access modes is typically ignored or required to be 0.

STIG	Date
AIX 5.3 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2014-10-03

Details

Check Text ( C-8247r2_chk )
Determine what "at" jobs exist on the system. Procedure: # ls /var/spool/cron/atjobs /var/spool/atjobs If there are no "at" jobs present, this is not applicable. Determine if any of the "at" jobs or any scripts referenced execute the umask command. Check for any umask setting more permissive than 077. # grep umask If any "at" job or referenced script sets umask to a value more permissive than 077, this is a finding.

Check Text ( C-8247r2_chk )

Determine what "at" jobs exist on the system.
Procedure:
# ls /var/spool/cron/atjobs /var/spool/atjobs

If there are no "at" jobs present, this is not applicable.

Determine if any of the "at" jobs or any scripts referenced execute the umask command. Check for any umask setting more permissive than 077.

# grep umask

If any "at" job or referenced script sets umask to a value more permissive than 077, this is a finding.

Fix Text (F-4277r2_fix)
Edit "at" jobs or referenced scripts to remove umask commands setting umask to a value less restrictive than 077.