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Cisco ASA VPN Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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.

    <VulnDiscussion>Both IPsec and TLS gateways use the RNG to strengthen the security of the protocols. Using a weak RNG will weaken the protoco...
    Rule Medium Severity
    Show

  • SRG-NET-000063-VPN-000220

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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.

    &lt;VulnDiscussion&gt;Without strong cryptographic integrity protections, information can be altered by unauthorized users without detection. SHA-...
    Rule Medium Severity
    Show

  • SRG-NET-000317-VPN-001090

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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.

    &lt;VulnDiscussion&gt;Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote...
    Rule High Severity
    Show

  • SRG-NET-000525-VPN-002330

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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.

    &lt;VulnDiscussion&gt;Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote...
    Rule High Severity
    Show

  • SRG-NET-000341-VPN-001350

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco VPN remote access server must be configured to accept Common Access Card (CAC) credential credentials.

    &lt;VulnDiscussion&gt;The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. DoD has mandated the use...
    Rule Medium Severity
    Show

  • SRG-NET-000369-VPN-001620

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco ASA VPN remote access server must be configured to disable split-tunneling for remote clients.

    &lt;VulnDiscussion&gt;Split tunneling would in effect allow unauthorized external connections, making the system more vulnerable to attack and to e...
    Rule Medium Severity
    Show

  • SRG-NET-000492-VPN-001980

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco ASA VPN remote access server must be configured to generate log records when successful and/or unsuccessful VPN connection attempts occur.

    &lt;VulnDiscussion&gt;Without generating log records that are specific to the security and mission needs of the organization, it would be difficult...
    Rule Medium Severity
    Show

  • SRG-NET-000580-VPN-002410

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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.

    &lt;VulnDiscussion&gt;A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA)...
    Rule Medium Severity
    Show

  • SRG-NET-000565-VPN-002390

    <GroupDescription></GroupDescription>
    Group
    Show

  • 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.

    &lt;VulnDiscussion&gt;Use of improperly configured or lower assurance equipment and solutions could compromise high-value information. The Nationa...
    Rule High Severity
    Show

  • SRG-NET-000345-VPN-002430

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco ASA must be configured to not accept certificates that have been revoked when using PKI for authentication.

    &lt;VulnDiscussion&gt;Situations may arise in which the certificate issued by a Certificate Authority (CA) may need to be revoked before the lifeti...
    Rule High Severity
    Show

  • 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.

    &lt;VulnDiscussion&gt;Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the indivi...
    Rule Medium Severity
    Show

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