Cisco ASA VPN Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
-
SRG-NET-000138-VPN-000490
Group -
The Cisco ASA remote access VPN server must be configured to produce log records containing information to establish the outcome of the events.
Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attack was successful or if changes were made to the security state of the ne...Rule Medium Severity -
SRG-NET-000062-VPN-000200
Group -
SRG-NET-000166-VPN-000590
Group -
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 -
SRG-NET-000088-VPN-000310
Group -
The Cisco ASA remote access VPN server must be configured to generate log records containing information to establish where the events occurred.
Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment,...Rule Medium Severity -
SRG-NET-000089-VPN-000330
Group -
The Cisco ASA remote access VPN server must be configured to generate log records containing information to establish the source of the events.
Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. In order to compile an accurate risk assessment...Rule Low Severity -
SRG-NET-000091-VPN-000350
Group -
The Cisco ASA remote access VPN server must be configured to use a FIPS-validated algorithm and hash function to protect the integrity of TLS remote access sessions.
Without integrity protection, unauthorized changes may be made to the log files and reliable forensic analysis and discovery of the source of malicious system activity may be degraded. Remote acce...Rule Medium Severity -
SRG-NET-000234-VPN-000810
Group -
The Cisco ASA remote access VPN server must be configured to generate unique session identifiers using a FIPS-validated Random Number Generator (RNG) based on the Deterministic Random Bit Generators (DRBG) algorithm.
Both IPsec and TLS gateways use the RNG to strengthen the security of the protocols. Using a weak RNG will weaken the protocol and make it more vulnerable. Use of a FIPS validated RNG that is not ...Rule Medium Severity -
SRG-NET-000063-VPN-000220
Group -
The Cisco ASA remote access VPN server must be configured to use SHA-2 at 384 bits or greater for hashing to protect the integrity of IPsec remote access sessions.
Without strong cryptographic integrity protections, information can be altered by unauthorized users without detection. SHA-1 is considered a compromised hashing standard and is being phased out o...Rule Medium Severity -
SRG-NET-000317-VPN-001090
Group -
SRG-NET-000525-VPN-002330
Group -
SRG-NET-000341-VPN-001350
Group -
The Cisco VPN remote access server must be configured to accept Common Access Card (CAC) credential credentials.
The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use of the CAC to support identity management and personal authentication f...Rule Medium Severity -
SRG-NET-000369-VPN-001620
Group -
The Cisco ASA VPN remote access server must be configured to disable split-tunneling for remote clients.
Split tunneling would in effect allow unauthorized external connections, making the system more vulnerable to attack and to exfiltration of organizational information. A VPN hardware or software c...Rule Medium Severity -
SRG-NET-000492-VPN-001980
Group -
The Cisco ASA VPN remote access server must be configured to generate log records when successful and/or unsuccessful VPN connection attempts occur.
Without generating log records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an inci...Rule Medium Severity -
SRG-NET-000580-VPN-002410
Group -
The Cisco ASA VPN remote access server must be configured to validate certificates used for Transport Layer Security (TLS) functions by performing RFC 5280-compliant certification path validation.
A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA). Certification path validation is necessary for a relying party to make...Rule Medium Severity -
SRG-NET-000565-VPN-002390
Group -
SRG-NET-000345-VPN-002430
Group -
The Cisco ASA must be configured to not accept certificates that have been revoked when using PKI for authentication.
Situations may arise in which the certificate issued by a Certificate Authority (CA) may need to be revoked before the lifetime of the certificate expires. For example, the certificate is known to ...Rule High Severity -
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
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.