STIGQter STIGQter: STIG Summary: Infoblox 8.x DNS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 09 Jan 2021:

CNAME records must not point to a zone with lesser security for more than six months.

DISA Rule

SV-233880r621666_rule

Vulnerability Number

V-233880

Group Title

SRG-APP-000516-DNS-000114

Rule Version

IDNS-8X-400022

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

1. Navigate to Data Management >> DNS >> Zones.
2. Edit the zone containing CNAME records discovered during review of the Audit Log.
3. Remove any zone-spanning CNAME records that have been active for more than six months.

Check Contents

Infoblox DNS records the creation date of every resource record, including CNAME records in the system, and the TimeStamp is attached to the CNAME object. Infoblox can also record the date of the last time this record was used or queried. CNAME records can be removed by the administrator when they reach their six-month maturity date.

1. Navigate to Grid Manager >> Administration >> Logs >> Audit Log. Click "Show Filter" if it is not already displayed.
2. Create a new search using "Object Type equals CNAME Record".
3. Click the plus symbol to add a second search parameter.
4. Create an additional search parameter, "Timestamp before YYYY-MM-DD", using the calendar selection box to choose the appropriate date six months prior to the current date.
5. Click "Apply" to display CNAME records created more than six months ago.

If there are zone-spanning CNAME records older than six months and the CNAME records resolve to anything other than fully qualified domain names for 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 with an AO-approved and documented mission need, this is a finding.

Vulnerability Number

V-233880

Documentable

False

Rule Version

IDNS-8X-400022

Severity Override Guidance

Infoblox DNS records the creation date of every resource record, including CNAME records in the system, and the TimeStamp is attached to the CNAME object. Infoblox can also record the date of the last time this record was used or queried. CNAME records can be removed by the administrator when they reach their six-month maturity date.

1. Navigate to Grid Manager >> Administration >> Logs >> Audit Log. Click "Show Filter" if it is not already displayed.
2. Create a new search using "Object Type equals CNAME Record".
3. Click the plus symbol to add a second search parameter.
4. Create an additional search parameter, "Timestamp before YYYY-MM-DD", using the calendar selection box to choose the appropriate date six months prior to the current date.
5. Click "Apply" to display CNAME records created more than six months ago.

If there are zone-spanning CNAME records older than six months and the CNAME records resolve to anything other than fully qualified domain names for 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 with an AO-approved and documented mission need, this is a finding.

Check Content Reference

M

Target Key

5251

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