III - Administrative Public
Rules and Groups employed by this XCCDF Profile
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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 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 -
The Cisco ASA remote access VPN server must be configured to use TLS 1.2 or higher to protect the confidentiality of remote access connections.
Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol. NIST SP 8...Rule High Severity -
SRG-NET-000063-VPN-000210
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 -
The Cisco VPN remote access server must be configured to use AES256 or greater encryption for the Internet Key Exchange (IKE) Phase 1 to protect confidentiality of remote access sessions.
Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DOD nonpublic information s...Rule High Severity -
SRG-NET-000525-VPN-002330
Group -
The Cisco ASA VPN remote access server must be configured to use AES256 or greater encryption for the IPsec security association to protect the confidentiality of remote access sessions.
Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DOD nonpublic information s...Rule High Severity -
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 -
The Cisco ASA VPN remote access server must be configured to use an approved High Assurance Commercial Solution for Classified (CSfC) cryptographic algorithm for remote access to a classified network.
Use of improperly configured or lower assurance equipment and solutions could compromise high-value information. The National Security Agency/Central Security Service's (NSA/CSS) CSfC program enab...Rule High Severity -
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 -
SRG-NET-000077-VPN-000280
Group -
The Cisco ASA must be configured to generate log records containing information to establish what type of VPN events occurred.
Without establishing what type of event occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. VPN gateways often have a separate au...Rule Low Severity
Node 2
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