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← Back to SLES 12 Security Technical Implementation Guide

V-217181

CAT II (Medium)

SUSE operating system file systems that are being imported via Network File System (NFS) must be mounted to prevent binary files from being executed.

Rule ID

SV-217181r991589_rule

STIG

SLES 12 Security Technical Implementation Guide

Version

V3R2

CCIs

SV-91947

Discussion

The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file system not containing approved binary files as they may be incompatible. Executing files from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative access.

Check Content

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

Find the file system(s) that contain the directories being exported with the following command:

# more /etc/fstab | grep nfs

UUID=e06097bb-cfcd-437b-9e4d-a691f5662a7d   /store   nfs   rw,noexec   0 0

If a file system found in "/etc/fstab" refers to NFS and it does not have the "noexec" option set, and use of NFS exported binaries is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Fix Text

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