The default global umask setting must be changed for user applications.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-58417	AOSX-09-001015	SV-72847r1_rule		Medium

Description
The default global umask setting must be set to '027' for user applications. The setting '027' ensures that user created files and directories will be readable, but not writable, by users that share the same group id. Users with a different group id will not be able to read or write those files. This mitigates the risk that unauthorized users might be able to read and write files saved to the system by user applications.

Description

The default global umask setting must be set to '027' for user applications. The setting '027' ensures that user created files and directories will be readable, but not writable, by users that share the same group id. Users with a different group id will not be able to read or write those files. This mitigates the risk that unauthorized users might be able to read and write files saved to the system by user applications.

STIG	Date
Apple OS X 10.9 (Mavericks) Workstation Security Technical Implementation Guide	2017-01-05

Details

Check Text ( C-59243r1_chk )
To view the umask setting, run the following command: awk '{ print $2 }' /etc/launchd-user.conf If the command produces an error, or the result is not '027', this is a finding.

Fix Text (F-63731r1_fix)
To set the umask setting for user applications, run the following command: sudo sh -c 'echo 'umask 027' > /etc/launchd-user.conf'