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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).


Overview

Finding ID Version Rule ID IA Controls Severity
V-248626 OL08-00-010650 SV-248626r779444_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 8 Security Technical Implementation Guide 2022-12-06

Details

Check Text ( C-52060r779442_chk )
Verify that 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 (F-52014r779443_fix)
Configure the "/etc/fstab" to use the "nosuid" option on file systems that are being imported via NFS.