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Virtual Private Network (VPN) Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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 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

    <GroupDescription></GroupDescription>
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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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