OL 8 must prevent files with the setuid and setgid bit set from being executed on file systems that are used with removable media.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-248623	OL08-00-010620	SV-248623r991589_rule		Medium

Description

The "nosuid" mount option causes the system not to 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.

STIG	Date
Oracle Linux 8 Security Technical Implementation Guide	2024-12-03

Details

Check Text (C-52057r779433_chk)

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

$ sudo 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 "nosuid" option set, this is a finding.

Fix Text (F-52011r779434_fix)

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