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V-215169

CAT II (Medium)

AIX /etc/security/mkuser.sys.custom file must not exist unless it is needed for customizing a new user account.

Rule ID

SV-215169r958362_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000015

Discussion

The "/etc/security/mkuser.sys.custom" is called by "/etc/security/mkuser.sys" to customize the new user account when a new user is created, or a user is logging into the system without a home directory. An improper "/etc/security/mkuser.sys.custom" script increases the risk that non-privileged users may obtain elevated privileges. It must not exist unless it is needed.

Check Content

Check if the "/etc/security/mkuser.sys.custom" file exists:
# ls /etc/security/mkuser.sys.custom

If the above command shows the file exists, this is a finding.

Fix Text

Remove the "/etc/security/mkuser.sys.custom" file using the following command:

# rm /etc/security/mkuser.sys.custom