Cron programs must not set the umask to a value less restrictive than 077.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4360	GEN003220	SV-27364r1_rule	ECCD-1 ECCD-2	Low

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 octal number, the first digit representing special access modes is typically ignored or required to be 0.

STIG	Date
AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE	2015-06-16

Details

Check Text ( C-28508r1_chk )
Determine if there are any crontabs by viewing a long listing of the directory. If there are crontabs, examine them to determine what cron jobs exist. Check for any programs specifying an umask. # ls -lL /var/spool/cron/crontabs # cat # grep umask If there are no cron jobs present, this vulnerability is not applicable. If any cron job contains an umask value more permissive than 077, this is a finding.

Check Text ( C-28508r1_chk )

Determine if there are any crontabs by viewing a long listing of the directory. If there are crontabs, examine them to determine what cron jobs exist. Check for any programs specifying an umask.

# ls -lL /var/spool/cron/crontabs
# cat
# grep umask

If there are no cron jobs present, this vulnerability is not applicable. If any cron job contains an umask value more permissive than 077, this is a finding.

Fix Text (F-4271r2_fix)
Edit cron script files and modify the umask to 077.