Title

The DNS server implementation must strongly bind the identity of the DNS server with the DNS information. (Cat II impact)

Discussion

Weakly bound credentials can be modified without invalidating the credential; therefore, non-repudiation can be violated. This requirement supports audit requirements that provide organizational personnel with the means to identify who produced specific information in the event of an information transfer. Organizations and/or data owners determine and approve the strength of the binding between the information producer and the information based on the security category of the information and relevant risk factors. DNSSEC and TSIG/SIG(0) both use digital signatures to establish the identity of the producer of particular pieces of information.

Check Content

Review the DNS server implementation configuration to determine if the DNS server strongly binds the identity of the DNS server with the DNS information. Examples include enabling DNSSEC and enabling TSIG or SIG(0). If the DNS server does not strongly bind the identity of the DNS server with the DNS information, this is a finding.

Fix Text

Configure the DNS server to strongly bind the identity of the DNS server with the DNS information.

Additional Identifiers

Rule ID: SV-205196r879724_rule

Vulnerability ID: V-205196

Group Title: SRG-APP-000347

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.