Removable media, remote file systems, and any file system that does not contain approved setuid files must be mounted with the "nosuid" option.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-220089	GEN002420	SV-220089r854459_rule		Medium

Description
The "nosuid" mount option causes the system to not execute setuid files with owner privileges. This option must be used for mounting any file system that does not contain approved setuid files. Executing setuid files from untrusted file systems, or file systems that do not contain approved setuid files, increases the opportunity for unprivileged users to attain unauthorized administrative access.

STIG	Date
Solaris 10 X86 Security Technical Implementation Guide	2022-09-07

Details

Check Text ( C-36428r602887_chk )
Check /etc/vfstab and verify the "nosuid" mount option is used on any user filesystem (such as /export/home) or filesystems mounted from removable media or network shares. # cat /etc/vfstab Check zfs filesystems for setuid mounts. #zfs get setuid

Fix Text (F-36392r602888_fix)
Use the following procedure for UFS filesystems. Edit /etc/vfstab and add the "nosuid" mount option to any user filesystem (such as /export/home) or filesystems mounted from removable media or network shares. Use the following procedure for ZFS filesystems. # zfs setuid = off < file system >