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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000337-ALG-000096

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must require users to re-authenticate when organization-defined circumstances or situations require re-authentication.

    &lt;VulnDiscussion&gt;Without re-authentication, users may access resources or perform tasks for which they do not have authorization. In addition...
    Rule Medium Severity
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  • SRG-NET-000138-ALG-000088

    <GroupDescription></GroupDescription>
    Group
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  • The ALG providing user access control intermediary services must be configured with a pre-established trust relationship and mechanisms with appropriate authorities (e.g., Active Directory or AAA server) which validate user account access authorizations and privileges.

    &lt;VulnDiscussion&gt;User account and privilege validation must be centralized in order to prevent unauthorized access using changed or revoked pr...
    Rule Medium Severity
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  • SRG-NET-000138-ALG-000063

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must uniquely identify and authenticate organizational users (or processes acting on behalf of organizational users).

    &lt;VulnDiscussion&gt;To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to pre...
    Rule Medium Severity
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  • SRG-NET-000138-ALG-000089

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must restrict user authentication traffic to specific authentication server(s).

    &lt;VulnDiscussion&gt;User authentication can be used as part of the policy filtering rule sets. Some URLs or network resources can be restricted t...
    Rule Medium Severity
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  • SRG-NET-000339-ALG-000090

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must implement multifactor authentication for remote access to non-privileged accounts such that one of the factors is provided by a device separate from the system gaining access.

    &lt;VulnDiscussion&gt;For remote access to non-privileged accounts, the purpose of requiring a device that is separate from the information system ...
    Rule Medium Severity
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  • SRG-NET-000340-ALG-000091

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must implement multifactor authentication for remote access to privileged accounts such that one of the factors is provided by a device separate from the system gaining access.

    &lt;VulnDiscussion&gt;For remote access to privileged accounts, the purpose of requiring a device that is separate from the information system gain...
    Rule Medium Severity
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  • SRG-NET-000140-ALG-000094

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must use multifactor authentication for network access to non-privileged accounts.

    &lt;VulnDiscussion&gt;To assure accountability and prevent unauthenticated access, non-privileged users must utilize multifactor authentication to ...
    Rule Medium Severity
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  • SRG-NET-000147-ALG-000095

    <GroupDescription></GroupDescription>
    Group
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  • The ALG providing user authentication intermediary services must implement 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-000400-ALG-000097

    <GroupDescription></GroupDescription>
    Group
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  • The ALG providing user authentication intermediary services must transmit only encrypted representations of passwords.

    &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-000344-ALG-000098

    <GroupDescription></GroupDescription>
    Group
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  • The ALG must prohibit the use of cached authenticators after an organization-defined time period.

    &lt;VulnDiscussion&gt;If the cached authenticator information is out of date, the validity of the authentication information may be questionable. ...
    Rule Medium Severity
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  • SRG-NET-000345-ALG-000099

    <GroupDescription></GroupDescription>
    Group
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  • The ALG providing user authentication intermediary services using PKI-based user authentication must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.

    &lt;VulnDiscussion&gt;Without configuring a local cache of revocation data, there is the potential to allow access to users who are no longer autho...
    Rule Medium Severity
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  • SRG-NET-000164-ALG-000100

    <GroupDescription></GroupDescription>
    Group
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  • The ALG that provides intermediary services for TLS must validate certificates used for TLS functions by performing RFC 5280-compliant certification path validation.

    &lt;VulnDiscussion&gt;A certificate's certification path is the path from the end entity certificate to a trusted root certification authority (CA)...
    Rule Medium Severity
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  • SRG-NET-000166-ALG-000101

    <GroupDescription></GroupDescription>
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  • The ALG providing PKI-based user authentication intermediary services must map authenticated identities to the user account.

    &lt;VulnDiscussion&gt;Authorization for access to any network element requires an approved and assigned individual account identifier. To ensure on...
    Rule Medium Severity
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  • SRG-NET-000169-ALG-000102

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must uniquely identify and authenticate non-organizational users (or processes acting on behalf of non-organizational users).

    &lt;VulnDiscussion&gt;Lack of authentication enables anyone to gain access to the network or possibly a network element that provides opportunity f...
    Rule Medium Severity
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  • SRG-NET-000349-ALG-000106

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services must conform to FICAM-issued profiles.

    &lt;VulnDiscussion&gt;Without conforming to Federal Identity, Credential, and Access Management (FICAM)-issued profiles, the information system may...
    Rule Medium Severity
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  • SRG-NET-000213-ALG-000107

    <GroupDescription></GroupDescription>
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  • The ALG must terminate all network connections associated with a communications session at the end of the session, or as follows: for in-band management sessions (privileged sessions), the session must be terminated after 10 minutes of inactivity; and for user sessions (non-privileged session), the session must be terminated after 15 minutes of inactivity.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
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  • SRG-NET-000510-ALG-000025

    <GroupDescription></GroupDescription>
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  • The ALG providing encryption intermediary services must implement NIST FIPS-validated cryptography to generate cryptographic hashes.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The network el...
    Rule Medium Severity
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  • SRG-NET-000510-ALG-000040

    <GroupDescription></GroupDescription>
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  • The ALG providing encryption intermediary services must implement NIST FIPS-validated cryptography for digital signatures.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The network el...
    Rule Medium Severity
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  • SRG-NET-000510-ALG-000111

    <GroupDescription></GroupDescription>
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  • The ALG providing encryption intermediary services must use NIST FIPS-validated cryptography to implement encryption services.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The network el...
    Rule Medium Severity
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  • SRG-NET-000228-ALG-000108

    <GroupDescription></GroupDescription>
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  • The ALG must detect, at a minimum, mobile code that is unsigned or exhibiting unusual behavior, has not undergone a risk assessment, or is prohibited for use based on a risk assessment.

    &lt;VulnDiscussion&gt;Mobile code is defined as software modules obtained from remote systems, transferred across a network, and then downloaded an...
    Rule Medium Severity
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  • SRG-NET-000288-ALG-000109

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must block or restrict detected prohibited mobile code.

    &lt;VulnDiscussion&gt;Mobile code is defined as software modules obtained from remote systems, transferred across a network, and then downloaded an...
    Rule Medium Severity
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  • SRG-NET-000289-ALG-000110

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must prevent the download of prohibited mobile code.

    &lt;VulnDiscussion&gt;Mobile code is defined as software modules obtained from remote systems, transferred across a network, and then downloaded an...
    Rule Medium Severity
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  • SRG-NET-000230-ALG-000113

    <GroupDescription></GroupDescription>
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  • The ALG must protect the authenticity of communications sessions.

    &lt;VulnDiscussion&gt;Authenticity protection provides protection against man-in-the-middle attacks/session hijacking and the insertion of false in...
    Rule Medium Severity
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  • SRG-NET-000231-ALG-000114

    <GroupDescription></GroupDescription>
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  • The ALG must invalidate session identifiers upon user logout 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-ALG-000115

    <GroupDescription></GroupDescription>
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  • The ALG must recognize only system-generated session identifiers.

    &lt;VulnDiscussion&gt;Network elements (depending on function) utilize sessions and session identifiers to control application behavior and user ac...
    Rule Medium Severity
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