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Virtual Private Network (VPN) Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • 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 non-privileged 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>
    Group
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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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  • 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>
    Group
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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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