Details

Verify that all the registry certificate files (usually found

under /etc/docker/certs.d/ directory) have permissions of ‘444’ or

more restrictive.

/etc/docker/certs.d/ directory contains Docker registry certificates.

These certificate files must have permissions of ‘444’ to maintain the integrity of the

certificates.

Solution

#> chmod 444 /etc/docker/certs.d//*
This would set the permissions for registry certificate files to ‘444’.

Impact-None.

Default Value-By default, the permissions for registry certificate files might not be ‘444’. The default file
permissions are governed by the system or user specific umask values.

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/514

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-6b.
• CSCv6|3.1

Source

• Tenable.com/audits