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V-257858

CAT II (Medium)

RHEL 9 must prevent special devices on file systems that are used with removable media.

Rule ID

SV-257858r991589_rule

STIG

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

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

Check Content

Verify file systems that are used for removable media are mounted with the "nodev" option with the following command:

$ more /etc/fstab

UUID=2bc871e4-e2a3-4f29-9ece-3be60c835222 /mnt/usbflash vfat noauto,owner,ro,nosuid,nodev,noexec 0 0

If a file system found in "/etc/fstab" refers to removable media and it does not have the "nodev" option set, this is a finding.

Fix Text

Configure the "/etc/fstab" to use the "nodev" option on file systems that are associated with removable media.