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Cisco ASA VPN Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000510-VPN-002170

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA must be configured to use a FIPS-validated cryptographic module to implement IPsec encryption services.

    &lt;VulnDiscussion&gt;FIPS 140-2/140-3 precludes the use of invalidated cryptography for the cryptographic protection of sensitive or valuable data...
    Rule Medium Severity
  • SRG-NET-000074-VPN-000250

    <GroupDescription></GroupDescription>
    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.

    &lt;VulnDiscussion&gt;Use of an approved DH algorithm ensures the IKE (Phase 1) proposal uses FIPS-validated key management techniques and processe...
    Rule High Severity
  • SRG-NET-000168-VPN-000600

    <GroupDescription></GroupDescription>
    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.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Although al...
    Rule Medium Severity
  • SRG-NET-000230-VPN-000780

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA must be configured to use FIPS-validated SHA-2 or higher for Internet Key Exchange (IKE) Phase 2.

    &lt;VulnDiscussion&gt;Authenticity protection provides protection against man-in-the-middle attacks/session hijacking and the insertion of false in...
    Rule High Severity
  • SRG-NET-000019-VPN-000040

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA VPN gateway must be configured to restrict what traffic is transported via the IPsec tunnel according to flow control policies.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additio...
    Rule Medium Severity
  • SRG-NET-000148-VPN-000540

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA VPN gateway must be configured to identify all peers before establishing a connection.

    &lt;VulnDiscussion&gt;Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. For...
    Rule Medium Severity
  • SRG-NET-000565-VPN-002400

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA VPN gateway must use cryptographic algorithms approved by NSA to protect NSS when transporting classified traffic across an unclassified network.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gatewa...
    Rule High Severity
  • SRG-NET-000337-VPN-001290

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA remote access VPN server must be configured to identify and authenticate users before granting access to the network.

    &lt;VulnDiscussion&gt;To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...
    Rule Medium Severity
  • SRG-NET-000140-VPN-000500

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA VPN gateway must be configured to renegotiate the IPsec Security Association after eight hours or less.

    &lt;VulnDiscussion&gt;The IPsec security association (SA) and its corresponding key will expire either after the number of seconds or amount of tra...
    Rule Medium Severity
  • SRG-NET-000337-VPN-001300

    <GroupDescription></GroupDescription>
    Group
  • The Cisco ASA VPN gateway must be configured to renegotiate the IKE security association after 24 hours or less.

    &lt;VulnDiscussion&gt;When a VPN gateway creates an IPsec security association (SA), resources must be allocated to maintain the SA. These resource...
    Rule Medium Severity

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