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III - Administrative Sensitive

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000335

    <GroupDescription></GroupDescription>
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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-000336

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  • When communications with the Central Log Server is lost, the VPN Gateway must continue to queue traffic log records locally.

    &lt;VulnDiscussion&gt;If the system were to continue processing after audit failure, actions can be taken on the system that cannot be tracked and ...
    Rule Medium Severity
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  • SRG-NET-000337

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  • The IPsec VPN Gateway must renegotiate the security association after 8 hours or less, or an organization-defined period.

    &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 security association after 24 hours or less or as defined by the organization.

    &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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  • 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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  • SRG-NET-000342

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

    &lt;VulnDiscussion&gt;DoD has mandated the use of the CAC as the Personal Identity Verification (PIV) credential to support identity management and...
    Rule Medium Severity
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  • SRG-NET-000343

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  • The VPN Gateway must authenticate all network-connected endpoint devices before establishing a connection.

    &lt;VulnDiscussion&gt;Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. ...
    Rule Medium Severity
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  • SRG-NET-000352

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  • The VPN Gateway must use an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The National Secu...
    Rule Medium Severity
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  • SRG-NET-000369

    <GroupDescription></GroupDescription>
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  • The VPN Gateway must disable split-tunneling for remote clients VPNs.

    &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
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  • SRG-NET-000371

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  • The IPsec VPN Gateway must specify Perfect Forward Secrecy (PFS) during Internet Key Exchange (IKE) negotiation.

    &lt;VulnDiscussion&gt;PFS generates each new encryption key independently from the previous key. Without PFS, compromise of one key will compromise...
    Rule High Severity
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  • SRG-NET-000371

    <GroupDescription></GroupDescription>
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  • The VPN Gateway and Client must be configured to protect the confidentiality and integrity of transmitted information.

    &lt;VulnDiscussion&gt;Without protection of the transmitted information, confidentiality and integrity may be compromised as unprotected communicat...
    Rule High Severity
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  • SRG-NET-000375

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  • The IPsec VPN Gateway must use Encapsulating Security Payload (ESP) in tunnel mode for establishing secured paths to transport traffic between the organization's sites or between a gateway and remote end-stations.

    &lt;VulnDiscussion&gt;ESP provides confidentiality, data origin authentication, integrity, and anti-replay services within the IPsec suite of proto...
    Rule Medium Severity
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  • SRG-NET-000400

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  • For accounts using password authentication, the site-to-site VPN Gateway must use SHA-2 or later protocol to protect the integrity of the password authentication process.

    &lt;VulnDiscussion&gt;Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are...
    Rule Medium Severity
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  • SRG-NET-000492

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  • The VPN Gateway must 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
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  • SRG-NET-000510

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  • The VPN Gateway must use a FIPS-validated cryptographic module to generate cryptographic hashes.

    &lt;VulnDiscussion&gt;FIPS 140-2 precludes the use of invalidated cryptography for the cryptographic protection of sensitive or valuable data withi...
    Rule Medium Severity
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  • SRG-NET-000510

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  • The VPN Gateway must use a FIPS-validated cryptographic module to implement encryption services for unclassified information requiring confidentiality.

    &lt;VulnDiscussion&gt;FIPS 140-2 precludes the use of invalidated cryptography for the cryptographic protection of sensitive or valuable data withi...
    Rule Medium Severity
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  • SRG-NET-000510

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  • The IPsec VPN Gateway IKE must use NIST FIPS-validated cryptography to implement encryption services for unclassified VPN traffic.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gatewa...
    Rule Medium Severity
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  • SRG-NET-000512

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  • The IPsec VPN Gateway must use Internet Key Exchange (IKE) for IPsec VPN Security Associations (SAs).

    &lt;VulnDiscussion&gt;Without IKE, the SPI is manually specified for each security association. IKE peers will negotiate the encryption algorithm a...
    Rule High Severity
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  • SRG-NET-000512

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  • The VPN Gateway must 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
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  • SRG-NET-000518

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  • The VPN Client logout function must be configured to terminate the session on/with the VPN Gateway.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end a session, the session may remain open and be exploited by an attacker; this is referred to a...
    Rule Medium Severity
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  • SRG-NET-000519

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  • The VPN Client must display an explicit logout message to users indicating the reliable termination of authenticated communications sessions.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end a session, the session may remain open and be exploited by an attacker; this is referred to a...
    Rule Medium Severity
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  • SRG-NET-000522

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  • For site-to-site, VPN Gateway must be configured to store only cryptographic representations of pre-shared Keys (PSKs).

    &lt;VulnDiscussion&gt;Pre-shared keys need to be protected at all times, and encryption is the standard method for protecting passwords. If PSKs ar...
    Rule Medium Severity
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  • SRG-NET-000525

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  • The IPsec VPN must use AES256 or greater encryption for the IPsec proposal 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
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  • SRG-NET-000530

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  • The TLS VPN Gateway that supports Government-only services must prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0.

    &lt;VulnDiscussion&gt;Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and u...
    Rule Medium Severity
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  • SRG-NET-000540

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  • The TLS VPN Gateway that supports citizen- or business-facing network devices must prohibit client negotiation to SSL 2.0 or SSL 3.0.

    &lt;VulnDiscussion&gt;Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and u...
    Rule Medium Severity
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