The IBM z/VM DOMAINSEARCH statement in the TCPIP DATA file must be configured with proper domain names for name resolution.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-245534	IBMZ-VM-001150	SV-245534r859041_rule		Medium

Description
If data origin authentication and data integrity verification are not performed, the resultant response could be forged, it may have come from a poisoned cache, the packets could have been intercepted without the resolver's knowledge, or resource records could have been removed which would result in query failure or denial of service. Data origin authentication verification must be performed to thwart these types of attacks. Each client of name resolution services either performs this validation on its own or has authenticated channels to trusted validation providers. Information systems that provide name and address resolution services for local clients include, for example, recursive resolving or caching Domain Name System (DNS) servers. DNS client resolvers either perform validation of DNSSEC signatures, or clients use authenticated channels to recursive resolvers that perform such validations. This is not applicable if DNSSEC is not implemented on the local network.

Description

If data origin authentication and data integrity verification are not performed, the resultant response could be forged, it may have come from a poisoned cache, the packets could have been intercepted without the resolver's knowledge, or resource records could have been removed which would result in query failure or denial of service. Data origin authentication verification must be performed to thwart these types of attacks. Each client of name resolution services either performs this validation on its own or has authenticated channels to trusted validation providers. Information systems that provide name and address resolution services for local clients include, for example, recursive resolving or caching Domain Name System (DNS) servers. DNS client resolvers either perform validation of DNSSEC signatures, or clients use authenticated channels to recursive resolvers that perform such validations. This is not applicable if DNSSEC is not implemented on the local network.

STIG	Date
IBM zVM Using CA VM:Secure Security Technical Implementation Guide	2022-08-31

Details

Check Text ( C-48809r859039_chk )
Examine the "TCPIP DATA" file. The domain specified for the "DOMAINORIGIN" statement is also used for host name resolution, as if it appeared in a "DOMAINSEARCH" statement. If there is no "DOMAINORIGIN" or "DOMAINSEARCH" statement, this is a finding. If the "DOMAINSEARCH" statement does not specify a proper domain, this is a finding. If the "DOMAINORIGIN" statement does not specify a proper domain, this is a finding.

Check Text ( C-48809r859039_chk )

Examine the "TCPIP DATA" file.

The domain specified for the "DOMAINORIGIN" statement is also used for host name resolution, as if it appeared in a "DOMAINSEARCH" statement.

If there is no "DOMAINORIGIN" or "DOMAINSEARCH" statement, this is a finding.

If the "DOMAINSEARCH" statement does not specify a proper domain, this is a finding.

If the "DOMAINORIGIN" statement does not specify a proper domain, this is a finding.

Fix Text (F-48765r859040_fix)
Configure any statement in the "TCPIP DATA" file used during host name resolution such as "DOMAINSEARCH" statement or the "DOMAINORIGIN" statement with a proper domain name.