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← Back to IBM AIX 7.x Security Technical Implementation Guide

V-215410

CAT II (Medium)

AIX must be configured to only boot from the system boot device.

Rule ID

SV-215410r991589_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

The ability to boot from removable media is the same as being able to boot into single user or maintenance mode without a password. This ability could allow a malicious user to boot the system and perform changes possibly compromising or damaging the system. It could also allow the system to be used for malicious purposes by a malicious anonymous user.

Check Content

Determine if the system is configured to boot from devices other than the system startup media by running command: 
# bootlist -m normal -o 

The returned values should be "hdisk{x}". 

If the system is setup to boot from a non-hard disk device, this is a finding. 

Additionally, ask the SA if the machine is setup for "multi-boot" in the SMS application. If multi-boot is enabled, the firmware will stop at boot time and request which image to boot from the user. 

If "multi-boot" is enabled, this is a finding.

Fix Text

Configure the system to only boot from system startup media:
# bootlist -m normal hdisk<x> 

Set "multi-boot" to "off" in the SMS application.