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

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64337r2_rule Cron programs must not set the umask to a value less restrictive than 077.

Vulnerability discussion

The umask controls the default access mode assigned to newly created files. A 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.

Check content

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 a umask more permissive than 077: Procedure: # ls -lL /var/spool/cron # ls -lL /etc/cron.d /etc/cron.daily /etc/cron.hourly /etc/cron.monthly /etc/cron.weekly or # ls -lL /etc/cron.*|grep -v deny # cat # grep umask If there are no cron jobs present, this vulnerability is not applicable. If any cron job contains a umask more permissive than 077, this is a finding.

Fix text

Edit cron script files and modify the umask to 077.

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