At jobs 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-64409r1_rule At jobs 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 number, the first digit representing special access modes is typically ignored or required to be 0.

Check content

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

Edit "at" jobs or referenced scripts to remove "umask" commands that set umask to a value less restrictive than 077.

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