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Check: RHEL-09-231065

RHEL 9 STIG: RHEL-09-231065 (in versions v1 r3 through v1 r1)

Title

RHEL 9 must prevent special devices on file systems that are imported via Network File System (NFS). (Cat II impact)

Discussion

The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.

Check Content

Verify RHEL 9 has the "nodev" 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=krb5:krb5i:krb5p Note: If no NFS mounts are configured, this requirement is Not Applicable. If the system is mounting file systems via NFS and the "nodev" option is missing, this is a finding.

Fix Text

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

Additional Identifiers

Rule ID: SV-257854r925549_rule

Vulnerability ID: V-257854

Group Title: SRG-OS-000480-GPOS-00227

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CCIs

CCIs tied to check.

Number	Definition
CCI-000366	The organization implements the security configuration settings.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
CM-6	Configuration Settings