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4.6.4 Ensure default group for the root account is GID 0

Information

The usermod command can be used to specify which group the root account belongs to. This affects permissions of files that are created by the root account.

Using GID 0 for the root account helps prevent root -owned files from accidentally becoming accessible to non-privileged users.

Solution

Run the following command to set the root account default group to GID 0 :

# usermod -g 0 root

See Also

https://workbench.cisecurity.org/benchmarks/12705

Item Details

Category: CONFIGURATION MANAGEMENT, IDENTIFICATION AND AUTHENTICATION, SYSTEM AND SERVICES ACQUISITION

References: 800-53|CM-1, 800-53|CM-2, 800-53|CM-6, 800-53|CM-7, 800-53|CM-7(1), 800-53|CM-9, 800-53|IA-5, 800-53|SA-3, 800-53|SA-8, 800-53|SA-10, CSCv7|5.1

Plugin: Unix

Control ID: 4adbb1433cca381f7abc96983dec6315bd73fc824da75cefaa5db6d0fb3e9f4d