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I - Mission Critical Classified

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000355

    <GroupDescription></GroupDescription>
    Group
  • The operating system must, for networked systems, compare internal information system clocks at least every 24 hours with a server which is synchronized to one of the redundant United States Naval Observatory (USNO) time servers, or a time server designated for the appropriate DoD network (NIPRNet/SIPRNet), and/or the Global Positioning System (GPS).

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
  • SRG-OS-000356

    <GroupDescription></GroupDescription>
    Group
  • The operating system must synchronize internal information system clocks to the authoritative time source when the time difference is greater than one second.

    &lt;VulnDiscussion&gt;Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the cor...
    Rule Medium Severity
  • SRG-OS-000358

    <GroupDescription></GroupDescription>
    Group
  • The operating system must record time stamps for audit records that meet a minimum granularity of one second for a minimum degree of precision.

    &lt;VulnDiscussion&gt;Without sufficient granularity of time stamps, it is not possible to adequately determine the chronological order of records....
    Rule Medium Severity
  • SRG-OS-000359

    <GroupDescription></GroupDescription>
    Group
  • The operating system must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT).

    &lt;VulnDiscussion&gt;If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analys...
    Rule Low Severity
  • SRG-OS-000360

    <GroupDescription></GroupDescription>
    Group
  • The operating system must enforce dual authorization for movement and/or deletion of all audit information, when such movement or deletion is not part of an authorized automatic process.

    &lt;VulnDiscussion&gt;An authorized user may intentionally or accidentally move or delete audit records without those specific actions being author...
    Rule Medium Severity
  • SRG-OS-000362

    <GroupDescription></GroupDescription>
    Group
  • The operating system must prohibit user installation of system software without explicit privileged status.

    &lt;VulnDiscussion&gt;Allowing regular users to install software, without explicit privileges, creates the risk that untested or potentially malici...
    Rule Medium Severity
  • SRG-OS-000363

    <GroupDescription></GroupDescription>
    Group
  • The operating system must notify designated personnel if baseline configurations are changed in an unauthorized manner.

    &lt;VulnDiscussion&gt;Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized ...
    Rule Medium Severity
  • SRG-OS-000364

    <GroupDescription></GroupDescription>
    Group
  • The operating system must enforce access restrictions.

    &lt;VulnDiscussion&gt;Failure to provide logical access restrictions associated with changes to system configuration may have significant effects o...
    Rule Medium Severity
  • SRG-OS-000365

    <GroupDescription></GroupDescription>
    Group
  • The operating system must audit the enforcement actions used to restrict access associated with changes to the system.

    &lt;VulnDiscussion&gt;Without auditing the enforcement of access restrictions against changes to the application configuration, it will be difficul...
    Rule Medium Severity
  • SRG-OS-000366

    <GroupDescription></GroupDescription>
    Group
  • The operating system must prevent the installation of patches, service packs, device drivers, or operating system components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.

    &lt;VulnDiscussion&gt;Changes to any software components can have significant effects on the overall security of the operating system. This require...
    Rule High Severity

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