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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-NET-000234-ALG-000116

    <GroupDescription></GroupDescription>
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  • The ALG must generate unique session identifiers using a FIPS 140-2 approved random number generator.

    &lt;VulnDiscussion&gt;Sequentially generated session IDs can be easily guessed by an attacker. Employing the concept of randomness in the generatio...
    Rule Medium Severity
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  • SRG-NET-000355-ALG-000117

    <GroupDescription></GroupDescription>
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  • The ALG providing user authentication intermediary services using PKI-based user authentication must only accept end entity certificates issued by DoD PKI or DoD-approved PKI Certification Authorities (CAs) for the establishment of protected sessions.

    &lt;VulnDiscussion&gt;Non-DoD approved PKIs have not been evaluated to ensure that they have security controls and identity vetting procedures in p...
    Rule Medium Severity
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  • SRG-NET-000236-ALG-000119

    <GroupDescription></GroupDescription>
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  • In the event of a system failure of the ALG function, the ALG must save diagnostic information, log system messages, and load the most current security policies, rules, and signatures when restarted.

    &lt;VulnDiscussion&gt;Failure in a secure state can address safety or security in accordance with the mission needs of the organization. Failure to...
    Rule Medium Severity
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  • SRG-NET-000362-ALG-000120

    <GroupDescription></GroupDescription>
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  • The ALG must implement load balancing to limit the effects of known and unknown types of Denial of Service (DoS) attacks.

    &lt;VulnDiscussion&gt;If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Load balancin...
    Rule Medium Severity
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  • SRG-NET-000362-ALG-000112

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must protect against known and unknown types of Denial of Service (DoS) attacks by employing rate-based attack prevention behavior analysis.

    &lt;VulnDiscussion&gt;If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Installation...
    Rule Medium Severity
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  • SRG-NET-000362-ALG-000155

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must protect against or limit the effects of known and unknown types of Denial of Service (DoS) attacks by employing pattern recognition pre-processors.

    &lt;VulnDiscussion&gt;If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Installation...
    Rule Medium Severity
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  • SRG-NET-000362-ALG-000126

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must protect against known types of Denial of Service (DoS) attacks by employing signatures.

    &lt;VulnDiscussion&gt;If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Installatio...
    Rule Medium Severity
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  • SRG-NET-000192-ALG-000121

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must block outbound traffic containing known and unknown DoS attacks to protect against the use of internal information systems to launch any Denial of Service (DoS) attacks against other networks or endpoints.

    &lt;VulnDiscussion&gt;DoS attacks can take multiple forms but have the common objective of overloading or blocking a network or host to deny or ser...
    Rule Medium Severity
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  • SRG-NET-000364-ALG-000122

    <GroupDescription></GroupDescription>
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  • The ALG must only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additio...
    Rule Medium Severity
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  • SRG-NET-000365-ALG-000123

    <GroupDescription></GroupDescription>
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  • The ALG must fail securely in the event of an operational failure.

    &lt;VulnDiscussion&gt;If a boundary protection device fails in an unsecure manner (open), information external to the boundary protection device ma...
    Rule Medium Severity
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  • SRG-NET-000202-ALG-000124

    <GroupDescription></GroupDescription>
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  • The ALG must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception).

    &lt;VulnDiscussion&gt;A deny-all, permit-by-exception network communications traffic policy ensures that only those connections which are essential...
    Rule Medium Severity
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  • SRG-NET-000370-ALG-000125

    <GroupDescription></GroupDescription>
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  • The ALG must identify and log internal users associated with denied outgoing communications traffic posing a threat to external information systems.

    &lt;VulnDiscussion&gt;Without identifying the users who initiated the traffic, it would be difficult to identify those responsible for the denied c...
    Rule Medium Severity
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  • SRG-NET-000401-ALG-000127

    <GroupDescription></GroupDescription>
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  • The ALG must check the validity of all data inputs except those specifically identified by the organization.

    &lt;VulnDiscussion&gt;Invalid user input occurs when a user inserts data or characters into an application's data entry fields and the application ...
    Rule Medium Severity
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  • SRG-NET-000380-ALG-000128

    <GroupDescription></GroupDescription>
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  • The ALG must behave in a predictable and documented manner that reflects organizational and system objectives when invalid inputs are received.

    &lt;VulnDiscussion&gt;A common vulnerability of network elements is unpredictable behavior when invalid inputs are received. This requirement guard...
    Rule Medium Severity
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  • SRG-NET-000273-ALG-000129

    <GroupDescription></GroupDescription>
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  • The ALG must generate error messages that provide the information necessary for corrective actions without revealing information that could be exploited by adversaries.

    &lt;VulnDiscussion&gt;Providing too much information in error messages risks compromising the data and security of the application and system. Org...
    Rule Medium Severity
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  • SRG-NET-000402-ALG-000130

    <GroupDescription></GroupDescription>
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  • The ALG must reveal error messages only to the ISSO, ISSM, and SCA.

    &lt;VulnDiscussion&gt;Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an orga...
    Rule Medium Severity
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  • SRG-NET-000251-ALG-000131

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must automatically update malicious code protection mechanisms.

    &lt;VulnDiscussion&gt;The malicious software detection functionality on network elements needs to be constantly updated in order to identify new th...
    Rule Medium Severity
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  • SRG-NET-000246-ALG-000132

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must update malicious code protection mechanisms and signature definitions whenever new releases are available in accordance with organizational configuration management policy and procedures.

    &lt;VulnDiscussion&gt;Malicious code protection mechanisms include, but are not limited to, anti-virus and malware detection software. In order to ...
    Rule Medium Severity
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  • SRG-NET-000248-ALG-000133

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must be configured to perform real-time scans of files from external sources at network entry/exit points as they are downloaded and prior to being opened or executed.

    &lt;VulnDiscussion&gt;Malicious code includes viruses, worms, Trojan horses, and Spyware. The code provides the ability for a malicious user to rea...
    Rule Medium Severity
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  • SRG-NET-000249-ALG-000134

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must block malicious code upon detection.

    &lt;VulnDiscussion&gt;Taking an appropriate action based on local organizational incident handling procedures minimizes the impact of this code on ...
    Rule Medium Severity
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  • SRG-NET-000249-ALG-000145

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must delete or quarantine malicious code in response to malicious code detection.

    &lt;VulnDiscussion&gt;Taking an appropriate action based on local organizational incident handling procedures minimizes the impact of this code on ...
    Rule Medium Severity
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  • SRG-NET-000249-ALG-000146

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must send an immediate (within seconds) alert to the system administrator, at a minimum, in response to malicious code detection.

    &lt;VulnDiscussion&gt;Without an alert, security personnel may be unaware of an impending failure of the audit capability; then the ability to perf...
    Rule Medium Severity
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  • SRG-NET-000383-ALG-000135

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  • The ALG providing content filtering must be configured to integrate with a system-wide intrusion detection system.

    &lt;VulnDiscussion&gt;Without coordinated reporting between separate devices, it is not possible to identify the true scale and possible target of ...
    Rule Medium Severity
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  • SRG-NET-000384-ALG-000136

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must detect use of network services that have not been authorized or approved by the ISSM and ISSO, at a minimum.

    &lt;VulnDiscussion&gt;Unauthorized or unapproved network services lack organizational verification or validation and therefore may be unreliable or...
    Rule Medium Severity
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  • SRG-NET-000385-ALG-000137

    <GroupDescription></GroupDescription>
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  • The ALG providing content filtering must generate a log record when unauthorized network services are detected.

    &lt;VulnDiscussion&gt;Unauthorized or unapproved network services lack organizational verification or validation and therefore may be unreliable or...
    Rule Medium Severity
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Node 2

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