The Windows DNS Server must protect the integrity of transmitted information.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259397	WDNS-22-000069	SV-259397r961632_rule		High

Description
Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. Protecting the confidentiality and integrity of organizational information can be accomplished by physical means (e.g., employing physical distribution systems) or by logical means (e.g., employing cryptographic techniques). If physical means of protection are employed, logical means (cryptography) do not have to be employed, and vice versa. Confidentiality is not an objective of DNS, but integrity is. DNSSEC and TSIG/SIG(0) both digitally sign DNS information to authenticate its source and ensure its integrity.

Description

Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. Protecting the confidentiality and integrity of organizational information can be accomplished by physical means (e.g., employing physical distribution systems) or by logical means (e.g., employing cryptographic techniques). If physical means of protection are employed, logical means (cryptography) do not have to be employed, and vice versa. Confidentiality is not an objective of DNS, but integrity is. DNSSEC and TSIG/SIG(0) both digitally sign DNS information to authenticate its source and ensure its integrity.

STIG	Date
Microsoft Windows Server Domain Name System (DNS) Security Technical Implementation Guide	2024-06-14

Details

Check Text ( C-63136r945337_chk )
Note: This check is not applicable for Windows DNS Servers that host only Active Directory-integrated zones or for Windows DNS Servers on a classified network. Validate this check from the Windows DNS Server being configured/reviewed. Log on to the Windows DNS Server using the account designated as Administrator or DNS Administrator. Determine a valid host in the zone. Open the Windows PowerShell prompt on the Windows DNS Server being configured/reviewed. Issue the following command: (Replace www.zonename.mil with a FQDN of a valid host in the zone being validated. Replace ###.###.###.### with the FQDN or IP address of the Windows DNS Server hosting the signed zone.) resolve-dnsname www.zonename.mil -server ###.###.###.### -dnssecok Note: It is important to use the -server switch followed by the DNS server name/IP address. The result should show the "A" record results. In addition, the results should show QueryType: RRSIG with an expiration, date signed, signer, and signature, similar to the following: Name: www.zonename.mil QueryType: RRSIG TTL: 189 Section: Answer TypeCovered: CNAME Algorithm: 8 LabelCount: 3 OriginalTtl: 300 Expiration: 11/21/2014 10:22:28 PM Signed 10/22/2014 10:22:28 PM Signer: zonename.mil Signature: {87, 232, 34, 134...} Name: origin-www.zonename.mil QueryType: A TTL: 201 Section: Answer IP4Address: ###.###.###.### If the results do not show the RRSIG and signature information, this is a finding.

Check Text ( C-63136r945337_chk )

Note: This check is not applicable for Windows DNS Servers that host only Active Directory-integrated zones or for Windows DNS Servers on a classified network.

Validate this check from the Windows DNS Server being configured/reviewed.

Log on to the Windows DNS Server using the account designated as Administrator or DNS Administrator.

Determine a valid host in the zone.

Open the Windows PowerShell prompt on the Windows DNS Server being configured/reviewed.

Issue the following command:
(Replace www.zonename.mil with a FQDN of a valid host in the zone being validated. Replace ###.###.###.### with the FQDN or IP address of the Windows DNS Server hosting the signed zone.)

resolve-dnsname www.zonename.mil -server ###.###.###.### -dnssecok

Note: It is important to use the -server switch followed by the DNS server name/IP address.

The result should show the "A" record results.

In addition, the results should show QueryType: RRSIG with an expiration, date signed, signer, and signature, similar to the following:

Name: www.zonename.mil
QueryType: RRSIG
TTL: 189
Section: Answer
TypeCovered: CNAME
Algorithm: 8
LabelCount: 3
OriginalTtl: 300
Expiration: 11/21/2014 10:22:28 PM
Signed 10/22/2014 10:22:28 PM
Signer: zonename.mil
Signature: {87, 232, 34, 134...}

Name: origin-www.zonename.mil
QueryType: A
TTL: 201
Section: Answer
IP4Address: ###.###.###.###

If the results do not show the RRSIG and signature information, this is a finding.

Fix Text (F-63044r945338_fix)
Sign or re-sign the hosted zone(s) on the DNS server being validated. Log on to the Windows DNS Server using the account designated as Administrator or DNS Administrator. Press the Windows key + R and execute "dnsmgmt.msc". On the opened DNS Manager snap-in from the left pane, expand the server name for the DNS server and then expand "Forward Lookup Zones". From the expanded list, right-click to select the zone (repeat for each hosted zone), point to DNSSEC, and then click "Sign the Zone" using either approved saved parameters or approved custom parameters.

Fix Text (F-63044r945338_fix)

Sign or re-sign the hosted zone(s) on the DNS server being validated.

Log on to the Windows DNS Server using the account designated as Administrator or DNS Administrator.

Press the Windows key + R and execute "dnsmgmt.msc".

On the opened DNS Manager snap-in from the left pane, expand the server name for the DNS server and then expand "Forward Lookup Zones".

From the expanded list, right-click to select the zone (repeat for each hosted zone), point to DNSSEC, and then click "Sign the Zone" using either approved saved parameters or approved custom parameters.