Check: GEN005900
SUSE Linux Enterprise Server v11 for System z STIG:
GEN005900
(in versions v1 r12 through v1 r9)
Title
The nosuid option must be enabled on all Network File System (NFS) client mounts. (Cat II impact)
Discussion
Enabling the nosuid mount option prevents the system from granting owner or group-owner privileges to programs with the suid or sgid bit set. If the system does not restrict this access, users with unprivileged access to the local system may be able to acquire privileged access by executing suid or sgid files located on the mounted NFS file system.
Check Content
Check the system for NFS mounts not using the "nosuid" option. Procedure: # mount -v | grep " type nfs " | egrep -v "nosuid" If the mounted file systems do not have the "nosuid" option, this is a finding.
Fix Text
Edit "/etc/fstab" and add the "nosuid" option for all NFS file systems. Remount the NFS file systems to make the change take effect.
Additional Identifiers
Rule ID: SV-46126r1_rule
Vulnerability ID: V-936
Group Title: GEN005900
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000225 |
The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions. |
Controls
| Number | Title |
|---|---|
| AC-6 |
Least Privilege |