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II - Mission Support Public

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000147

    <GroupDescription></GroupDescription>
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  • The TLS VPN must be configured to use replay-resistant authentication mechanisms for network access to nonprivileged accounts.

    &lt;VulnDiscussion&gt;A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authen...
    Rule Medium Severity
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  • SRG-NET-000147

    <GroupDescription></GroupDescription>
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  • The IPsec VPN Gateway must use anti-replay mechanisms for security associations.

    &lt;VulnDiscussion&gt;Anti-replay is an IPsec security mechanism at a packet level, which helps to avoid unwanted users from intercepting and modif...
    Rule Medium Severity
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  • SRG-NET-000148

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must uniquely identify all network-connected endpoint devices 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
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  • SRG-NET-000164

    <GroupDescription></GroupDescription>
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  • The VPN Gateway, when utilizing PKI-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.

    &lt;VulnDiscussion&gt;Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate n...
    Rule Medium Severity
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  • SRG-NET-000165

    <GroupDescription></GroupDescription>
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  • The site-to-site VPN, when using PKI-based authentication for devices, must enforce authorized access to the corresponding private key.

    &lt;VulnDiscussion&gt;If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the ne...
    Rule Medium Severity
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  • SRG-NET-000166

    <GroupDescription></GroupDescription>
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  • The Remote Access VPN Gateway must use a separate authentication server (e.g., LDAP, RADIUS, TACACS+) to perform user authentication.

    &lt;VulnDiscussion&gt;The VPN interacts directly with public networks and devices and should not contain user authentication information for all us...
    Rule Medium Severity
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  • SRG-NET-000166

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must map the authenticated identity to the user account for PKI-based authentication.

    &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
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  • SRG-NET-000168

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must use FIPS-validated SHA-2 or higher hash function to protect the integrity of hash message authentication code (HMAC), Key Derivation Functions (KDFs), Random Bit Generation, hash-only applications, and digital signature verification.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Although al...
    Rule Medium Severity
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  • SRG-NET-000169

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must uniquely identify and authenticate non-organizational users (or processes acting on behalf of non-organizational users).

    &lt;VulnDiscussion&gt;Lack of authentication and identification enables non-organizational users to gain access to the network or possibly a VPN ga...
    Rule Medium Severity
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  • SRG-NET-000205

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must be configured to route sessions to an IDPS for inspection.

    &lt;VulnDiscussion&gt;Remote access devices, such as those providing remote access to network devices and information systems, which lack automated...
    Rule Medium Severity
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  • SRG-NET-000213

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must terminate all network connections associated with a communications session at the end of the session.

    &lt;VulnDiscussion&gt;Idle TCP sessions can be susceptible to unauthorized access and hijacking attacks. By default, routers do not continually tes...
    Rule Low Severity
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  • SRG-NET-000230

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must use FIPS 140-2 compliant mechanisms for authentication to a cryptographic module.

    &lt;VulnDiscussion&gt;Unapproved mechanisms that are used for authentication to the cryptographic module are not verified, and therefore cannot be ...
    Rule Medium Severity
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  • SRG-NET-000230

    <GroupDescription></GroupDescription>
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  • The IPSec VPN must be configured to use FIPS-validated SHA-2 at 384 bits or higher for Internet Key Exchange (IKE).

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Although al...
    Rule High Severity
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  • SRG-NET-000231

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must invalidate session identifiers upon user logoff or other session termination.

    &lt;VulnDiscussion&gt;Captured sessions can be reused in "replay" attacks. This requirement limits the ability of adversaries from capturing and co...
    Rule Medium Severity
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  • SRG-NET-000233

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  • The VPN Gateway must recognize only system-generated session identifiers.

    &lt;VulnDiscussion&gt;VPN gateways (depending on function) utilize sessions and session identifiers to control application behavior and user access...
    Rule Medium Severity
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  • SRG-NET-000234

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must generate unique session identifiers using FIPS-validated Random Number Generator (RNG) based on the Deterministic Random Bit Generators (DRBG) algorithm.

    &lt;VulnDiscussion&gt;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
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  • SRG-NET-000235

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must fail to a secure state if system initialization fails, shutdown fails, or aborts fail.

    &lt;VulnDiscussion&gt;Failure to a known safe state helps prevent systems from failing to a state that may cause loss of data or unauthorized acces...
    Rule Medium Severity
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  • SRG-NET-000313

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  • The VPN Gateway must be configured to perform an organization-defined action if the audit reveals unauthorized activity.

    &lt;VulnDiscussion&gt;Remote access devices, such as those providing remote access to network devices and information systems, which lack automated...
    Rule Medium Severity
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  • SRG-NET-000314

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  • The VPN Gateway administrator accounts or security policy must be configured to allow the system administrator to immediately disconnect or disable remote access to devices and/or users when needed.

    &lt;VulnDiscussion&gt;Without the ability to immediately disconnect or disable remote access, an attack or other compromise taking progress would n...
    Rule Medium Severity
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  • SRG-NET-000317

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  • The IPsec VPN Gateway must use AES encryption for the Internet Key Exchange (IKE) proposal 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
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  • SRG-NET-000334

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  • The VPN Gateway must off-load audit records onto a different system or media than the system being audited.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common...
    Rule Medium Severity
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  • SRG-NET-000335

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  • The VPN Gateway must generate a log record or an SNMP trap that can be forwarded as an alert to, at a minimum, the SCA and ISSO, of all log failure events where the detection and/or prevention function is unable to write events to either local storage or the centralized server.

    &lt;VulnDiscussion&gt;It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required....
    Rule Medium Severity
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  • SRG-NET-000337

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  • The VPN Gateway must renegotiate the IPsec security association (SA) after eight hours or less.

    &lt;VulnDiscussion&gt;The IPsec SA and its corresponding key will expire either after the number of seconds or amount of traffic volume has exceede...
    Rule Medium Severity
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  • SRG-NET-000337

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  • The VPN Gateway must renegotiate the IKE security association (SA) after eight hours or less.

    &lt;VulnDiscussion&gt;When a VPN gateway creates an IPsec SA, resources must be allocated to maintain the SA. These resources are wasted during per...
    Rule Medium Severity
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  • SRG-NET-000341

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  • The VPN Gateway must accept the Common Access Card (CAC) credential.

    &lt;VulnDiscussion&gt;The use of Personal Identity Verification (PIV) credentials facilitates standardization and reduces the risk of unauthorized...
    Rule Medium Severity
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