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V-4339

CAT I (High)

The Linux NFS Server must not have the insecure file locking option.

Rule ID

SV-44658r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000225 CCI-000764

Discussion

Insecure file locking could allow for sensitive data to be viewed or edited by an unauthorized user.

Check Content

Determine if an NFS server is running on the system by:

# ps -ef |grep nfsd

If an NFS server is running, confirm it is not configured with the insecure_locks option by:

# exportfs -v

The example below would be a finding:

/misc/export speedy.example.com(rw,insecure_locks)

Fix Text

Remove the "insecure_locks" option from all NFS exports on the system.