STIGQter STIGQter: STIG Summary: BIND 9.x Security Technical Implementation Guide Version: 3 Release: 3 Benchmark Date: 01 Jul 2026:

On the BIND 9.x server, CNAME records must not point to a zone with lesser security for more than six months.

DISA Rule

SV-272411r1156962_rule

Vulnerability Number

V-272411

Group Title

SRG-APP-000516-DNS-000114

Rule Version

BIND-9X-001580

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

In the case of third-party CDNs or cloud offerings, document the mission need with the AO.

Edit the zone file.

Remove CNAME records that are older than six months that do not meet the CDN or cloud offering criteria.

Restart the BIND 9.x process.

Check Contents

Verify that the zone files used by the BIND 9.x server do not contain resource records for a domain in which the server is not authoritative.

Inspect the "named.conf" file for the following:

zone example.com {
file "db.example.com.signed";
};

Inspect each zone file for "CNAME" records and verify with the DNS administrator that these records are less than six months old.

The exceptions are glue records supporting zone delegations, CNAME records supporting a system migration, or CNAME records that point to third-party Content Delivery Networks (CDN) or cloud computing platforms. In the case of third-party CDNs or cloud offerings, an approved mission need must be demonstrated.

If there are CNAME records that point to third-party Content Delivery Networks (CDNs) or cloud computing platforms without an authorizing official (AO)-approved and documented mission need, this is a finding.

If a CNAME record is more than six months old, excluding the above, this is a finding.

Vulnerability Number

V-272411

Documentable

False

Rule Version

BIND-9X-001580

Severity Override Guidance

Verify that the zone files used by the BIND 9.x server do not contain resource records for a domain in which the server is not authoritative.

Inspect the "named.conf" file for the following:

zone example.com {
file "db.example.com.signed";
};

Inspect each zone file for "CNAME" records and verify with the DNS administrator that these records are less than six months old.

The exceptions are glue records supporting zone delegations, CNAME records supporting a system migration, or CNAME records that point to third-party Content Delivery Networks (CDN) or cloud computing platforms. In the case of third-party CDNs or cloud offerings, an approved mission need must be demonstrated.

If there are CNAME records that point to third-party Content Delivery Networks (CDNs) or cloud computing platforms without an authorizing official (AO)-approved and documented mission need, this is a finding.

If a CNAME record is more than six months old, excluding the above, this is a finding.

Check Content Reference

M

Target Key

5687