OL 9 must be configured so that the Network File System (NFS) is configured to use RPCSEC_GSS.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-271640	OL09-00-002010	SV-271640r1091632_rule	CCI-000366	medium
Description
When an NFS server is configured to use RPCSEC_SYS, a selected userid and groupid are used to handle requests from the remote user. The userid and groupid could mistakenly or maliciously be set incorrectly. The RPCSEC_GSS method of authentication uses certificates on the server and client systems to authenticate the remote mount request more securely.
STIG			Date
Oracle Linux 9 Security Technical Implementation Guide			2025-05-08

Related Frameworks

4 paths across 3 frameworks

NIST 800-531 mapping

CM-6

1.00

DISA · 1 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent

NIST 800-1712 mappings

3.4.1

1.00

DISA · 1 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent
NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent

3.4.2

1.00

DISA · 1 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent
NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent

CCI1 mapping

CCI-000366

1.00

DISA · 1 · disa_xccdf · related

Details

Check Text (C-271640r1091632_chk)

If no NFS mounts are configured, this requirement is Not Applicable. Verify that OL 9 has the "sec" option configured for all NFS mounts with the following command: $ cat /etc/fstab | grep nfs 192.168.22.2:/mnt/export /data nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5p:krb5i:krb5 If the system is mounting file systems via NFS and has the sec option without the "krb5:krb5i:krb5p" settings, the "sec" option has the "sys" setting, or the "sec" option is missing, this is a finding.

Fix Text (F-75597r1091631_fix)

Update the "/etc/fstab" file so the option "sec" is defined for each NFS mounted file system and the "sec" option does not have the "sys" setting. Ensure the "sec" option is defined as "krb5p:krb5i:krb5".