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The Linux NFS Server must not have the insecure file locking option.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-4339 | GEN000000-LNX00560 | SV-62985r1_rule | IAIA-1 IAIA-2 | High |
| Description |
|---|
| Insecure file locking could allow for sensitive data to be viewed or edited by an unauthorized user. |
| STIG | Date |
|---|---|
| Oracle Linux 5 Security Technical Implementation Guide | 2015-06-05 |
Details
| Check Text ( C-51777r1_chk ) |
|---|
| 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 (F-53559r1_fix) |
|---|
| Remove the "insecure_locks" option from all NFS exports on the system. Procedure: Edit /etc/exports and remove all instances of the insecure_locks option. Re-export the file systems to make the setting take effect. # exportfs -a |