Certificate Name Filtering must be implemented with appropriate authorization and documentation.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-69227	ICERT030	SV-83849r1_rule		Medium

Description
Certificate name filtering is a facility that allows multiple certificates to be mapped to a single ACP userid. Rather than matching a certificate stored in the ACP to determine the userid, criteria rules are used. Depending on the filter criteria, a large number of client certificates could be mapped to a single userid. Failure to properly control the use of certificate name filtering could result in the loss of individual identity and accountability.

Description

Certificate name filtering is a facility that allows multiple certificates to be mapped to a single ACP userid. Rather than matching a certificate stored in the ACP to determine the userid, criteria rules are used. Depending on the filter criteria, a large number of client certificates could be mapped to a single userid. Failure to properly control the use of certificate name filtering could result in the loss of individual identity and accountability.

STIG	Date
z/OS TSS STIG	2016-06-30

Details

Check Text ( C-70031r1_chk )
If certificate name filtering is in use, the ISSM should document each active filter rule and have written approval to use the rule. Issue the following TSS command to list any certificate name filters defined to TSS: TSS LIST(SDT) CERTMAP(ALL) If there is nothing to list, there is not a finding. NOTE: Certificate name filters are only valid when their Status is TRUST. Therefore, you may ignore filters with the NOTRUST status. If certificate name filters are defined and they have a Status of TRUST, certificate name filtering is in use. If certificate name filtering is in use and filtering rules have been documented and approved by the ISSM, there is not a finding. If certificate name filtering is in use and filtering rules have not been documented and approved by the ISSM, this is a finding.

Check Text ( C-70031r1_chk )

If certificate name filtering is in use, the ISSM should document each active filter rule and have written approval to use the rule.

Issue the following TSS command to list any certificate name filters defined to TSS:

TSS LIST(SDT) CERTMAP(ALL)

If there is nothing to list, there is not a finding.

NOTE: Certificate name filters are only valid when their Status is TRUST. Therefore, you may ignore filters with the NOTRUST status.

If certificate name filters are defined and they have a Status of TRUST, certificate name filtering is in use.

If certificate name filtering is in use and filtering rules have been documented and approved by the ISSM, there is not a finding.

If certificate name filtering is in use and filtering rules have not been documented and approved by the ISSM, this is a finding.

Fix Text (F-75787r1_fix)
Ensure any certificate name filtering rules in use are documented and approved by the ISSM.