II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
-
SRG-NET-000078-VPN-000290
Group -
The Cisco ASA must be configured to generate log records containing information to establish when the events occurred.
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. VPN gateways often have a separate audit log for ...Rule Low Severity -
SRG-NET-000336-VPN-001280
Group -
The Cisco ASA must be configured to queue log records locally in the event that the central audit server is down or not reachable.
If the system were to continue processing after audit failure, actions can be taken on the system that cannot be tracked and recorded for later forensic analysis. Because of the importance of ensu...Rule Medium Severity -
SRG-NET-000335-VPN-001270
Group -
The Cisco ASA must be configured to generate an alert that can be forwarded as an alert to organization-defined personnel and/or firewall administrator of all log failure events.
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without a real-time alert, security personnel may be unaware of an impe...Rule Medium Severity -
SRG-NET-000164-VPN-000560
Group -
The Cisco ASA must be configured to validate certificates via a trustpoint that identifies a DoD or DoD-approved certificate authority.
Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. To meet this requirement, the information...Rule Medium Severity -
SRG-NET-000512-VPN-002220
Group -
The Cisco ASA must be configured to use Internet Key Exchange (IKE) for all IPsec security associations.
Without IKE, the Security Parameter Index (SPI) is manually specified for each security association. IKE peers will negotiate the encryption algorithm and authentication or hashing methods as well ...Rule High Severity -
SRG-NET-000132-VPN-000460
Group -
The Cisco ASA must be configured to use Internet Key Exchange v2 (IKEv2) for all IPsec security associations.
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-NET-000510-VPN-002180
Group -
The Cisco ASA must be configured to use NIST FIPS-validated cryptography for Internet Key Exchange (IKE) Phase 1.
Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gateway must implement cryptographic modules adhering to the higher standards ...Rule Medium Severity -
SRG-NET-000371-VPN-001640
Group -
The Cisco ASA must be configured to specify Perfect Forward Secrecy (PFS) for the IPsec Security Association (SA) during IKE Phase 2 negotiation.
PFS generates each new encryption key independently from the previous key. Without PFS, compromise of one key will compromise all communications. The Phase 2 (Quick Mode) Security Association (SA)...Rule Medium Severity -
SRG-NET-000510-VPN-002160
Group -
The Cisco ASA must be configured to use a FIPS-validated cryptographic module to generate cryptographic hashes.
FIPS 140-2/140-3 precludes the use of invalidated cryptography for the cryptographic protection of sensitive or valuable data within federal systems. Unvalidated cryptography is viewed by NIST as p...Rule Medium Severity -
SRG-NET-000510-VPN-002170
Group -
The Cisco ASA must be configured to use a FIPS-validated cryptographic module to implement IPsec encryption services.
FIPS 140-2/140-3 precludes the use of invalidated cryptography for the cryptographic protection of sensitive or valuable data within federal systems. Unvalidated cryptography is viewed by NIST as p...Rule Medium Severity -
SRG-NET-000074-VPN-000250
Group -
The Cisco ASA must be configured to use a Diffie-Hellman (DH) Group of 16 or greater for Internet Key Exchange (IKE) Phase 1.
Use of an approved DH algorithm ensures the IKE (Phase 1) proposal uses FIPS-validated key management techniques and processes in the production, storage, and control of private/secret cryptographi...Rule High Severity -
SRG-NET-000168-VPN-000600
Group -
The Cisco ASA must be configured to use FIPS-validated SHA-2 at 384 bits or higher for Internet Key Exchange (IKE) Phase 1.
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Although allowed by SP800-131Ar2 for some applications, SHA-1 is considered a compr...Rule Medium Severity -
SRG-NET-000230-VPN-000780
Group -
The Cisco ASA must be configured to use FIPS-validated SHA-2 or higher for Internet Key Exchange (IKE) Phase 2.
Authenticity protection provides protection against man-in-the-middle attacks/session hijacking and the insertion of false information into sessions. Although allowed by SP800-131Ar2 for some appl...Rule High Severity -
SRG-NET-000019-VPN-000040
Group -
The Cisco ASA VPN gateway must be configured to restrict what traffic is transported via the IPsec tunnel according to flow control policies.
Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth ...Rule Medium Severity -
SRG-NET-000148-VPN-000540
Group -
The Cisco ASA VPN gateway must be configured to identify all peers before establishing a connection.
Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. For distributed architectures (e.g., service-oriented architectures), the d...Rule Medium Severity -
SRG-NET-000565-VPN-002400
Group -
The Cisco ASA VPN gateway must use cryptographic algorithms approved by NSA to protect NSS when transporting classified traffic across an unclassified network.
Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gateway must implement cryptographic modules adhering to the higher standards ...Rule High Severity -
SRG-NET-000337-VPN-001290
Group -
The Cisco ASA VPN gateway must be configured to renegotiate the IPsec Security Association after eight hours or less.
The IPsec security association (SA) and its corresponding key will expire either after the number of seconds or amount of traffic volume has exceeded the configured limit. A new SA is negotiated be...Rule Medium Severity -
SRG-NET-000337-VPN-001300
Group -
The Cisco ASA VPN gateway must be configured to renegotiate the IKE security association after 24 hours or less.
When a VPN gateway creates an IPsec security association (SA), resources must be allocated to maintain the SA. These resources are wasted during periods of IPsec endpoint inactivity, which could re...Rule Medium Severity -
SRG-NET-000166-VPN-000580
Group -
The Cisco ASA remote access VPN server must be configured to use a separate authentication server than that used for administrative access.
The VPN interacts directly with public networks and devices and should not contain user authentication information for all users. AAA network security services provide the primary framework through...Rule Medium Severity -
SRG-NET-000320-VPN-001120
Group -
The Cisco ASA remote access VPN server must be configured to use LDAP over SSL to determine authorization for granting access to the network.
Protecting authentication communications between the client, the VPN Gateway, and the authentication server keeps this critical information from being exploited. In distributed information systems...Rule Medium Severity -
SRG-NET-000138-VPN-000490
Group -
The Cisco ASA remote access VPN server must be configured to identify and authenticate users before granting access to the network.
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational user...Rule Medium Severity -
SRG-NET-000140-VPN-000500
Group -
The Cisco ASA remote access VPN server must be configured to enforce certificate-based authentication before granting access to the network.
To assure accountability and prevent unauthenticated access, non-privileged users must utilize multifactor authentication to prevent potential misuse and compromise of the system. Multifactor auth...Rule High Severity -
SRG-NET-000166-VPN-000590
Group -
The Cisco ASA remote access VPN server must be configured to map the distinguished name (DN) from the client’s certificate to entries in the authentication server to determine authorization to access the network.
Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis. This re...Rule Medium Severity -
SRG-NET-000041-VPN-000110
Group -
The Cisco ASA remote access VPN server must be configured to display the Standard Mandatory DoD Notice and Consent Banner before granting access to the network.
Display of a standardized and approved use notification before granting access to the network ensures privacy and security notification verbiage used is consistent with applicable federal laws, Exe...Rule Medium Severity -
SRG-NET-000079-VPN-000300
Group -
The Cisco ASA remote access VPN server must be configured to generate log records containing information that establishes the identity of any individual or process associated with the event.
Without information that establishes the identity of the subjects (i.e., users or processes acting on behalf of users) associated with the events, security personnel cannot determine responsibility...Rule Medium Severity
Node 2
The content of the drawer really is up to you. It could have form fields, definition lists, text lists, labels, charts, progress bars, etc. Spacing recommendation is 24px margins. You can put tabs in here, and can also make the drawer scrollable.