IBM z/OS UNIX HFS MapName files security parameters must be properly specified.

An XCCDF Rule

Description

Removal of unneeded or non-secure functions, ports, protocols, and services mitigate the risk of unauthorized connection of devices, unauthorized transfer of information, or other exploitation of these resources. The organization must perform a periodic scan/review of the application (as required by CCI-000384) and disable functions, ports, protocols, and services deemed to be unneeded or non-secure.

ID: SV-223854r991589_rule
Version: RACF-US-000170
Severity: Medium
References: CCI-000366
Updated: about 2 months ago

Remediation Templates

Review the settings in /etc/auto.master and /etc/mapname for z/OS UNIX security parameters and configure the values to conform to the specifications below.

The /etc/auto.master HFS file (and the use of Automount) is optional. 

The setuid parameter and the security parameter have a significant security impact. For this reason these parameters must be explicitly specified and not be allowed to default.
Each MapName file will specify the "setuid NO" and "security YES statements for each automounted directory.

If there is a deviation from the required values, documentation must exist for the deviation.

Security NO disables security checking for file access. Security NO is only allowed on test and development domains.

Setuid YES allows a user to run under a different UID/GID identity. Justification documentation is required to validate the use of setuid YES.

IBM z/OS UNIX HFS MapName files security parameters must be properly specified.

Description

Remediation Templates

A Manual Procedure