STIGQter: STIG Summary: Red Hat Enterprise Linux 7 Security Technical Implementation Guide Version: 3 Release: 3 Benchmark Date: 23 Apr 2021:

The Red Hat Enterprise Linux operating system must set the umask value to 077 for all local interactive user accounts.

DISA Rule

SV-204488r603261_rule

Vulnerability Number

V-204488

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-07-021040

Severity

CAT II

CCI(s)

• CCI-000318 - The organization audits and reviews activities associated with configuration-controlled changes to the system.
• CCI-000368 - The organization documents any deviations from the established configuration settings for organization-defined information system components based on organization-defined operational requirements.
• CCI-001813 - The information system enforces access restrictions.
• CCI-001814 - The Information system supports auditing of the enforcement actions.
• CCI-001812 - The information system prohibits user installation of software without explicit privileged status.

Weight

10

Fix Recommendation

Remove the umask statement from all local interactive user's initialization files.

If the account is for an application, the requirement for a umask less restrictive than "077" can be documented with the Information System Security Officer, but the user agreement for access to the account must specify that the local interactive user must log on to their account first and then switch the user to the application account with the correct option to gain the account's environment variables.

Check Contents

Verify that the default umask for all local interactive users is "077".

Identify the locations of all local interactive user home directories by looking at the "/etc/passwd" file.

Check all local interactive user initialization files for interactive users with the following command:

Note: The example is for a system that is configured to create users home directories in the "/home" directory.

# grep -i umask /home/*/.*

If any local interactive user initialization files are found to have a umask statement that has a value less restrictive than "077", this is a finding.

Vulnerability Number

V-204488

Documentable

False

Rule Version

RHEL-07-021040

Severity Override Guidance

Verify that the default umask for all local interactive users is "077".

Identify the locations of all local interactive user home directories by looking at the "/etc/passwd" file.

Check all local interactive user initialization files for interactive users with the following command:

Note: The example is for a system that is configured to create users home directories in the "/home" directory.

# grep -i umask /home/*/.*

If any local interactive user initialization files are found to have a umask statement that has a value less restrictive than "077", this is a finding.

Check Content Reference

M

Target Key

2899

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