WDNS-CM-000006 - The Windows 2012 DNS Server with a caching name server role must be secured against pollution by ensuring the authenticity and integrity of queried records.

Information

A potential vulnerability of DNS is that an attacker can poison a name server's cache by sending queries that will cause the server to obtain host-to-IP address mappings from bogus name servers that respond with incorrect information. Once a name server has been poisoned, legitimate clients may be directed to non-existent hosts (which constitutes a denial of service), or, worse, hosts that masquerade as legitimate ones to obtain sensitive data or passwords.

To guard against poisoning, name servers authoritative for .mil domains should be separated functionally from name servers that resolve queries on behalf of internal clients. Organizations may achieve this separation by dedicating machines to each function or, if possible, by running two instances of the name server software on the same machine: one for the authoritative function and the other for the resolving function. In this design, each name server process may be bound to a different IP address or network interface to implement the required segregation.

Windows 2012 DNS Servers with a caching name server role must be secured against pollution by ensuring that the authenticity and integrity of queried records are verified before any data is cached.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Implement DNSSEC on all non-AD-integrated, standalone, caching Windows 2012 DNS Servers to ensure caching server validates signed zones when resolving and caching.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Windows_2012_Server_DNS_V2R4_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CAT|II, CCI|CCI-000366, Rule-ID|SV-215576r561297_rule, STIG-ID|WDNS-CM-000006, STIG-Legacy|SV-73015, STIG-Legacy|V-58585, Vuln-ID|V-215576

Plugin: Windows

Control ID: aca8a7a3875ad42c7a03a0af2e15c509a6ab81f00ca5d817ea7029b16b482475