AlmaLinux OS 9 must prevent code execution on file systems that are imported via Network File System (NFS).

The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file system not containing approved binary as they may be incompatible. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.

Note: If no NFS mounts are configured, this requirement is Not Applicable.

Verify AlmaLinux OS 9 has the "noexec" option configured for all NFS mounts with the following command:

$ grep nfs /etc/fstab 

192.168.1.9:/mnt/export /backups nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5p:krb5i:krb5

If the system is mounting file systems via NFS and the "noexec" option is missing, this is a finding.

Update each NFS mounted file system to use the "noexec" option on file systems that are being imported via NFS.