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ACF2 TSOTWX GSO record values must be set to obliterate the logon password on TWX devices.


Overview

Finding ID Version Rule ID IA Controls Severity
V-223509 ACF2-ES-000920 SV-223509r695443_rule Medium
Description
To prevent the compromise of authentication information, such as passwords during the authentication process, the feedback from the operating system must not provide any information allowing an unauthorized user to compromise the authentication mechanism. Obfuscation of user-provided information that is typed into the system is a method used when addressing this risk. Displaying asterisks when a user types in a password is an example of obscuring feedback of authentication information.
STIG Date
IBM z/OS ACF2 Security Technical Implementation Guide 2022-06-22

Details

Check Text ( C-25182r695442_chk )
From the ISPF Command Shell enter:
ACF
SET CONTROL(GSO)
LIST TSOTWX

If the GSO TSOTWX record values conform to the following requirements, this is not a finding.

CR(15)
IDLE(17)
LENGTH(8)
M1(X)
M2(N)
M3(Z)
M4(M)
STRING()
Fix Text (F-25170r500661_fix)
Define a cross out mask to obliterate the logon password on TWX devices.

CR(15)
IDLE(17)
LENGTH(8)
M1(X)
M2(N)
M3(Z)
M4(M)
STRING()

Example:
SET C(GSO)
INSERT TSOTWX CR(15) IDLE(17) LENGTH(8) M1(X) M2(N) M3(Z) M4(M) STRING()

F ACF2,REFRESH(TSOTWX)