The AUTHEXIT GSO record value is used to define an extended user authentication exit at TSO logon, for Operator Identification (OID) card usage. DISA requires the use of NCPASS on all of its domains. DISA sites require the use of AUTHEXIT for other non DISA sites this value is optional.

From z/OS ACF2 STIG

Part of ACF0260

Associated with IA controls: DCCS-1, DCCS-2

Associated with: CCI-000764 CCI-000765

SV-131r2_rule The AUTHEXIT GSO record value is used to define an extended user authentication exit at TSO logon, for Operator Identification (OID) card usage. DISA requires the use of NCPASS on all of its domains. DISA sites require the use of AUTHEXIT for other non DISA sites this value is optional.

Vulnerability discussion

The system-wide options control the default settings for determining how the ACP will function when handling requests for access to the operating system environment, ACP, and customer data. The ACP provides the ability to set a number of these fields at the subsystem level. If no setting is found, the system-wide defaults will be used. The improper setting of any one of these fields, individually or in combination with another, can compromise the security of the processing environment. In addition, failure to establish standardized settings for the ACP control options introduces the possibility of exposure during a migration process or contingency plan activation.

Check content

a) Refer to the following report produced by the ACF2 Data Collection: - ACF2CMDS.RPT(ACFGSO) Automated Analysis Refer to the following report produced by the ACF2 Data Collection: - PDI(ACF0260) b) If the GSO AUTHEXIT record values conform to the following DISA requirements, there is NO FINDING: GSO AUTHEXIT.xxx LIDFIELD(AUTHSUP1) PROCPGM(AUTHXNCP) NOINFOSTG c) If there is any deviation from the DISA requirements in the GSO AUTHEXIT record values, this is a FINDING.

Fix text

The IAO will ensure that the AUTHEXIT GSO value is used to define an extended user authentication exit at TSO logon. For Operator Identification (OID) card usage. DISA requires the use of NCPASS on all of its domains. DISA sites require the use of AUTHEXIT for other non DISA sites this value is optional. Ensure the GSO AUTHEXIT record values conform to the following DISA requirements. GSO AUTHEXIT.001 record: LIDFIELD(AUTHSUP1) PROCPGM(AUTHXNCP) NOINFOSTG Example: SET C(GSO) INSERT AUTHEXIT.001 NOINFOSTG LIDFIELD(AUTHSUP1) PROCPGM(AUTHXNCP) F ACF2,REFRESH(AUTHEXIT)

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