Puppet Class: cis_security_hardening::rules::nfs_nosuid

Defined in:
manifests/rules/nfs_nosuid.pp

Summary

Ensure nosuid option is set for NFS

Overview

The operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are being imported via Network File System (NFS).

Rationale: The “nosuid” mount option causes the system to not execute “setuid” and “setgid” files with owner privileges. This option must be used for mounting any file system not containing approved “setuid” and “setguid” files. Executing files from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative access.

Examples:

class { 'cis_security_hardening::rules::nfs_nosuid':
  enforce => true,
}

Parameters:

  • enforce (Boolean) (defaults to: false) —

    Enforce the rule.



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# File 'manifests/rules/nfs_nosuid.pp', line 21

class cis_security_hardening::rules::nfs_nosuid (
  Boolean $enforce = false,
) {
  if $enforce {
    $nfs = fact('cis_security_hardening.nfs_file_systems') ? {
      undef   => {},
      default => fact('cis_security_hardening.nfs_file_systems'),
    }

    $nfs.each |$fs, $data| {
      cis_security_hardening::set_mount_options { "${fs}-nosuid":
        mountpoint   => $fs,
        mountoptions => 'nosuid',
      }
    }
  }
}