STIGUI
V-237916CAT II — Medium severitySV-237916r858966_rule

CA VM:Secure product Config Delay LOG option must be set to 0.

Rule version IBMZ-VM-000590 · STIG v2 · 2022-08-31

Discussion

IBM z/VM 6.4.0 made changes to obscure whether a logon is invalid due to the user ID or due to the password. Both the logon prompting sequence and the message HCPLGA050E were changed. However, DELAYLOG causes a delay for a logon with an invalid password that it does not cause when the user ID is invalid. Thus, if you are using DELAYLOG with z/VM 6.4.0, you can inadvertently let someone trying to break into your system know that it is the password that is invalid.

Check

Display the CA VM:Secure product Config file.

If the "DELAYLOG" record does not exist, this is not a finding.

If the "DELAYLOG" record is set to "0", this is not a finding.

Fix

Configure DELAYLOG = 0 or delete the "DELAYLOG" configuration file record.

Identifiers

Group ID
V-237916
Group title
SRG-OS-000480-GPOS-00226
Rule ID
SV-237916r858966_rule
Check ID
C-41126r858964_chk
Fix ID
F-41085r858965_fix