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Application Layer Gateway (ALG) Security Requirements Guide (SRG)

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000234-ALG-000116

    <GroupDescription></GroupDescription>
    Group
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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>
    Group
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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>
    Group
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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>
    Group
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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>
    Group
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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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  • 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
    Show

  • SRG-NET-000362-ALG-000155

    <GroupDescription></GroupDescription>
    Group
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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
    Show

  • SRG-NET-000362-ALG-000126

    <GroupDescription></GroupDescription>
    Group
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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
    Show

  • SRG-NET-000192-ALG-000121

    <GroupDescription></GroupDescription>
    Group
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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>
    Group
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  • SRG-NET-000365-ALG-000123

    <GroupDescription></GroupDescription>
    Group
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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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