The default umask for system and users must be 077.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-216341 | SRG-OS-000480 | SOL-11.1-040250 | SV-216341r959010_rule | 2026-02-19 | 3 |
Description
Setting a very secure default value for umask ensures that users make a conscious choice about their file permissions.
ℹ️ Check
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
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