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V-248626

CAT II (Medium)

OL 8 must prevent files with the setuid and setgid bit set from being executed on file systems that are imported via Network File System (NFS).

Rule ID

SV-248626r1156666_rule

STIG

Oracle Linux 8 Security Technical Implementation Guide

Version

V2R8

CCIs

CCI-000366

Discussion

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 nonprivileged users to attain unauthorized administrative access.

Check Content

Note: If no NFS mounts are configured, this requirement is Not Applicable.

Verify file systems being imported via NFS are mounted with the "nosuid" option with the following command: 
 
$ sudo grep nfs /etc/fstab | grep nosuid 
 
UUID=e06097bb-cfcd-437b-9e4d-a691f5662a7d /store nfs rw,nosuid,nodev,noexec 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 "/etc/fstab" to use the "nosuid" option on file systems that are being imported via NFS.