Detections
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AIX7-00-002125 - AIX must request and perform data origin and integrity authentication verification on the name/address resolution responses the system receives from authoritative sources.

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Information

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 DoS. Data origin and integrity authentication 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. Information systems that use technologies other than the DNS to map between host/service names and network addresses provide other means to enable clients to verify the authenticity of response data.

This is not applicable if DNSSEC is not implemented on the local network.

Satisfies: SRG-OS-000399-GPOS-00178, SRG-OS-000400-GPOS-00179, SRG-OS-000401-GPOS-00180, SRG-OS-000402-GPOS-00181

Solution

Add the following line to the '/etc/resolv.conf' file:

nameserver <nameserver_IPAddress>

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_IBM_AIX_7-x_V2R1_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-21, CAT|II, CCI|CCI-002465, CCI|CCI-002466, CCI|CCI-002467, CCI|CCI-002468, Rule-ID|SV-215307r508663_rule, STIG-ID|AIX7-00-002125, STIG-Legacy|SV-101653, STIG-Legacy|V-91555, Vuln-ID|V-215307

Plugin: Unix

Control ID: 38b344100c57758d3868c3bb09528cfc82b965c858f1756e42f90fb3efe93273