The Oracle Linux operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are used with removable media.

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The Oracle Linux operating system 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-221742	OL07-00-021010	SV-221742r603260_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 7 Security Technical Implementation Guide	2021-04-01

Details

Check Text ( C-23457r419298_chk )
Verify file systems used for removable media are mounted with the "nosuid" option. Check the file systems mounted at boot time with the following command: # more /etc/fstab UUID=2bc871e4-e2a3-4f29-9ece-3be60c835222 /mnt/usbflash vfat noauto,owner,ro,nosuid 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-23446r419299_fix)
Configure the "/etc/fstab" to use the "nosuid" option on file systems that are associated with removable media.