II - Mission Support Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-APP-000516-DNS-000095
Group -
Primary authoritative name servers must be configured to only receive zone transfer requests from specified secondary name servers.
Authoritative name servers (especially primary name servers) should be configured with an allow-transfer access control substatement designating the list of hosts from which zone transfer requests ...Rule Medium Severity -
SRG-APP-000001-DNS-000115
Group -
The Infoblox system must limit the number of concurrent client connections to the number of allowed dynamic update clients.
Limiting the number of concurrent sessions reduces the risk of Denial of Service (DoS) to the DNS implementation. Name servers do not have direct user connections but accept client connections for...Rule Medium Severity -
SRG-APP-000125-DNS-000012
Group -
The Infoblox system audit records must be backed up at least every seven days onto a different system or system component than the system or component being audited.
Protection of log data includes assuring log data is not accidentally lost or deleted. Backing up audit records to a different system or onto separate media than the system being audited on a defin...Rule Medium Severity -
SRG-APP-000142-DNS-000014
Group -
Infoblox systems configured to run the DNS service must be configured to prohibit or restrict unapproved ports and protocols.
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable...Rule Medium Severity -
SRG-APP-000158-DNS-000015
Group -
Infoblox systems which are configured to perform zone transfers to non-Grid name servers must utilize transaction signatures (TSIG).
Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. This applies to server-to-server (zone transfer) transactions only and is pr...Rule Medium Severity -
SRG-APP-000176-DNS-000094
Group -
Only the private key corresponding to the ZSK alone must be kept on the name server that does support dynamic updates.
Infoblox systems when deployed in a Grid configuration store DNSSEC keys on the designated Grid Master system. As the central point of administration, the Grid Master should be configured for admin...Rule Medium Severity -
SRG-APP-000176-DNS-000096
Group -
Signature generation using the KSK must be done off-line, using the KSK-private stored off-line.
Infoblox systems when deployed in a Grid configuration store DNSSEC keys on the designated Grid Master system. As the central point of administration, the Grid Master should be configured for admin...Rule Medium Severity -
SRG-APP-000185-DNS-000021
Group -
The Infoblox system must be configured to employ strong authenticators in the establishment of nonlocal maintenance and diagnostic sessions.
If maintenance tools are used by unauthorized personnel, they may accidentally or intentionally damage or compromise the system. The act of managing systems and applications includes the ability to...Rule Medium Severity -
SRG-APP-000213-DNS-000024
Group -
The Infoblox system must be configured to provide additional data origin artifacts along with the authoritative data the system returns in response to external name/address resolution queries.
The underlying feature in the major threat associated with DNS query/response (i.e., forged response or response failure) is the integrity of DNS data returned in the response. The security objecti...Rule Medium Severity -
SRG-APP-000214-DNS-000025
Group -
A DNS server implementation must provide the means to indicate the security status of child zones.
If name server replies are invalid or cannot be validated, many networking functions and communication would be adversely affected. With DNS, the presence of Delegation Signer (DS) records associat...Rule Medium Severity -
SRG-APP-000214-DNS-000079
Group -
The Key Signing Key (KSK) rollover interval must be configured to no less than one year.
The DNS root key is a cryptographic public-private key pair used for DNSSEC signing of the DNS root zone records. The root zone KSK serves as the anchor for the “chain of trust” that enables DNS re...Rule Medium Severity -
SRG-APP-000215-DNS-000003
Group -
The Infoblox system implementation must enforce approved authorizations for controlling the flow of information between DNS servers and between DNS servers and DNS clients based on DNSSEC policies.
A mechanism to detect and prevent unauthorized communication flow must be configured or provided as part of the system design. If information flow is not enforced based on approved authorizations, ...Rule Medium Severity -
SRG-APP-000215-DNS-000026
Group -
A DNS server implementation must provide the means to enable verification of a chain of trust among parent and child domains (if the child supports secure resolution services).
If name server replies are invalid or cannot be validated, many networking functions and communication would be adversely affected. With DNS, the presence of Delegation Signer (DS) records associat...Rule Medium Severity -
SRG-APP-000219-DNS-000028
Group -
Infoblox DNS servers must protect the authenticity of communications sessions for zone transfers.
DNS is a fundamental network service that is prone to various attacks, such as cache poisoning and man-in-the middle attacks. If communication sessions are not provided appropriate validity prote...Rule Medium Severity -
SRG-APP-000219-DNS-000029
Group -
Infoblox DNS servers must be configured to protect the authenticity of communications sessions for dynamic updates.
DNS is a fundamental network service that is prone to various attacks, such as cache poisoning and man-in-the middle attacks. If communication sessions are not provided appropriate validity protect...Rule Medium Severity -
SRG-APP-000219-DNS-000030
Group -
Infoblox DNS servers must be configured to protect the authenticity of communications sessions for queries.
The underlying feature in the major threat associated with DNS query/response (i.e., forged response or response failure) is the integrity of DNS data returned in the response. An integral part of ...Rule Medium Severity -
SRG-APP-000226-DNS-000032
Group -
In the event of a system failure, The Infoblox system must preserve any information necessary to determine cause of failure and any information necessary to return to operations with least disruption to mission processes.
Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Failure to a known secure state helps prevent a loss of confidentiality, i...Rule Medium Severity -
SRG-APP-000246-DNS-000035
Group -
The Infoblox system must be configured to restrict the ability of individuals to use the DNS server to launch Denial of Service (DoS) attacks against other information systems.
A DoS is a condition where a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. Individual...Rule Medium Severity -
SRG-APP-000247-DNS-000036
Group -
The Infoblox system must be configured to manage excess capacity, bandwidth, or other redundancy to limit the effects of information flooding types of Denial of Service (DoS) attacks.
A DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. In the ca...Rule Medium Severity -
SRG-APP-000268-DNS-000039
Group -
The Infoblox system must be configured to activate a notification to the system administrator when a component failure is detected.
Predictable failure prevention requires organizational planning to address system failure issues. If components key to maintaining systems security fail to function, the system could continue opera...Rule Medium Severity -
SRG-APP-000347-DNS-000041
Group -
An Infoblox DNS server must strongly bind the identity of the DNS server with the DNS information using DNSSEC.
Weakly bound credentials can be modified without invalidating the credential; therefore, non-repudiation can be violated. This requirement supports audit requirements that provide organizational p...Rule Medium Severity -
SRG-APP-000348-DNS-000042
Group -
The Infoblox system must be configured to provide the means for authorized individuals to determine the identity of the source of the DNS server-provided information.
Without a means for identifying the individual that produced the information, the information cannot be relied upon. Identifying the validity of information may be delayed or deterred. This requir...Rule Medium Severity -
SRG-APP-000349-DNS-000043
Group -
The Infoblox system must be configured to validate the binding of the other DNS servers identity to the DNS information for a server-to-server transaction (e.g., zone transfer).
Validation of the binding of the information prevents the modification of information between production and review. The validation of bindings can be achieved, for example, by the use of cryptogra...Rule Medium Severity -
SRG-APP-000383-DNS-000047
Group -
Recursion must be disabled on Infoblox DNS servers which are configured as authoritative name servers.
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 tha...Rule Medium Severity -
SRG-APP-000394-DNS-000049
Group -
The Infoblox system must authenticate the other DNS server before responding to a server-to-server transaction.
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Device authentication is a solution enabling an organization to manage de...Rule Medium Severity
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