Title

The default umask for system and users must be 077. (Cat II impact)

Discussion

Setting a very secure default value for umask ensures that users make a conscious choice about their file permissions.

Check Content

The root role is required. Determine if the default umask is configured properly. # grep -i "^UMASK=" /etc/default/login If "UMASK=077" is not displayed, this is a finding. Check local initialization files: # cut -d: -f1 /etc/passwd | xargs -n1 -iUSER sh -c "grep umask ~USER/.*" If this command does not output a line indicating "umask 077" for each user, this is a finding.

Fix Text

The root role is required. Edit local and global initialization files containing "umask" and change them to use 077. # pfedit /etc/default/login Insert the line UMASK=077 # pfedit [user initialization file] Insert the line umask 077

Additional Identifiers

Rule ID: SV-216106r603268_rule

Vulnerability ID: V-216106

Group Title: SRG-OS-000480

Expert Comments

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