IBM zVM Using CA VM:Secure STIG Version Comparison

IBM zVM Using CA VM:Secure Security Technical Implementation Guide

Comparison

There are 2 differences between versions v1 r1 (Dec. 11, 2017) (the "left" version) and v2 r1 (July 23, 2021) (the "right" version).

Check IBMZ-VM-000040 was changed between these two versions. Green, underlined text was added, red, struck-out text was removed.

The regular view of the left check and right check may be easier to read.

Text Differences

Title

The IBM z/VM JOURNALING LOGON parameter must be set for lockout after 3 attempts for 15 minutes.

Check Content

Display the System Configuration File. If the “JOURNALING” statement is set to: Facility ON LOGON Lockout after 3 attempts for 15 minutes, this is not a finding. Issue finding. Note: Site may set Lockout value at 0, this will require system administrator action for reset. Issue "QUERY JOURNAL" command. If the response is as follows this is not a finding: Journal: LOGON-on

Discussion

By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.

Fix

Configure the System Configuration “JOURNALING” statement to: Facility ON LOGON Lockout after 3 attempts for 15 minutes. minutes or 0 if system administrator action is desired.