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← Back to SUSE Linux Enterprise Server 15 Security Technical Implementation Guide

V-235000

CAT II (Medium)

SUSE operating system 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.

Rule ID

SV-235000r991589_rule

STIG

SUSE Linux Enterprise Server 15 Security Technical Implementation Guide

Version

V2R7

CCIs

None

Discussion

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.

Check Content

Verify SUSE operating system file systems that are being NFS exported are mounted with the "nosuid" option.

Find the file system(s) that contain the directories being exported 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

Configure the SUSE operating system "/etc/fstab" file to use the "nosuid" option on file systems that are being exported via NFS.