SLEM 5 file systems that are being imported via Network File System (NFS) must be mounted to prevent files with the setuid and setgid bit set from being executed.

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SLEM 5 file systems that are being imported via Network File System (NFS) must be mounted to prevent files with the setuid and setgid bit set from being executed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-261281	SLEM-05-231025	SV-261281r996326_rule		Medium

Description
The "nosuid" mount option causes the system to not 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
SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-65010r996325_chk )
Verify SLEM 5 file systems that are being NFS exported are mounted with the "nosuid" option with the following command: > grep nfs /etc/fstab UUID=e06097bb-cfcd-437b-9e4d-a691f5662a7d /store nfs rw,nosuid 0 0 If a file system found in "/etc/fstab" refers to NFS and it does not have the "nosuid" option set, this is a finding.

Fix Text (F-64918r995709_fix)
Configure SLEM 5 "/etc/fstab" file to use the "nosuid" option on file systems that are being exported via NFS.