AIX removable media, remote file systems, and any file system not containing approved device files must be mounted with the nodev option.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215235 | AIX7-00-001139 | SV-215235r991589_rule | CCI-000366 | medium |
| Description | ||||
| The nodev (or equivalent) mount option causes the system to not handle device files as system devices. This option must be used for mounting any file system not containing approved device files. Device files can provide direct access to system hardware and can compromise security if not protected. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215235r991589_chk)
Identify any file system mounted from removable media, network shares, or file systems not containing any approved device files:
# cat /etc/filesystems
/:
dev = /dev/hd4
vfs = jfs2
log = /dev/hd8
mount = automatic
check = false
type = bootfs
vol = root
free = true
/home:
dev = /dev/hd1
vol = "/home"
mount = true
check = true
free = false
vfs = jfs2
log = /dev/hd8
10.17.76.74:/opt/nfs /home/doejohn
vfs = nfs
log = /dev/hd8
mount = true
options = nodev
account = false
If any file system mounted from removable media, network shares, or file systems not containing any approved device files is not using the "nodev" option, this is a finding.
Fix Text (F-16431r294157_fix)
Edit "/etc/filesystems" and add the "options = nodev" to all entries for remote or removable media file systems, and file systems containing no approved device files.