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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 2023-12-01

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.