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General Purpose Operating System Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000304

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  • The operating system must notify system administrators and ISSOs of account enabling actions.

    &lt;VulnDiscussion&gt;Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing ...
    Rule Medium Severity
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  • SRG-OS-000312

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  • The operating system must allow operating system admins to pass information to any other operating system admin or user.

    &lt;VulnDiscussion&gt;Discretionary Access Control (DAC) is based on the notion that individual users are "owners" of objects and therefore have di...
    Rule Medium Severity
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  • SRG-OS-000312

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  • The operating system must allow operating system admins to grant their privileges to other operating system admins.

    &lt;VulnDiscussion&gt;Discretionary Access Control (DAC) is based on the notion that individual users are "owners" of objects and therefore have di...
    Rule Medium Severity
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  • SRG-OS-000312

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  • The operating system must allow operating system admins to change security attributes on users, the operating system, or the operating systems components.

    &lt;VulnDiscussion&gt;Discretionary Access Control (DAC) is based on the notion that individual users are "owners" of objects and therefore have di...
    Rule Medium Severity
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  • SRG-OS-000324

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  • The operating system must prevent nonprivileged users from executing privileged functions to include disabling, circumventing, or altering implemented security safeguards/countermeasures.

    &lt;VulnDiscussion&gt;Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or proce...
    Rule High Severity
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  • SRG-OS-000326

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  • The operating system must prevent all software from executing at higher privilege levels than users executing the software.

    &lt;VulnDiscussion&gt;In certain situations, software applications/programs need to execute with elevated privileges to perform required functions....
    Rule Medium Severity
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  • SRG-OS-000327

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  • The operating system must audit the execution of privileged functions.

    &lt;VulnDiscussion&gt;Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external enti...
    Rule Medium Severity
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  • SRG-OS-000329

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  • The operating system must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes occur.

    &lt;VulnDiscussion&gt;By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...
    Rule Medium Severity
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  • SRG-OS-000337

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  • The operating system must provide the capability for assigned IMOs/ISSOs or designated SAs to change the auditing to be performed on all operating system components, based on all selectable event criteria in near real time.

    &lt;VulnDiscussion&gt;If authorized individuals do not have the ability to modify auditing parameters in response to a changing threat environment,...
    Rule Medium Severity
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  • SRG-OS-000341

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  • The operating system must allocate audit record storage capacity to store at least one week's worth of audit records, when audit records are not immediately sent to a central audit record storage facility.

    &lt;VulnDiscussion&gt;In order to ensure operating systems have a sufficient storage capacity in which to write the audit logs, operating systems n...
    Rule Low Severity
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  • SRG-OS-000342

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  • The operating system must offload audit records onto a different system or media from the system being audited.

    &lt;VulnDiscussion&gt;Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common...
    Rule Low Severity
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  • SRG-OS-000343

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  • The operating system must immediately notify the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.

    &lt;VulnDiscussion&gt;If security personnel are not notified immediately when storage volume reaches 75% utilization, they are unable to plan for a...
    Rule Low Severity
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  • SRG-OS-000344

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  • The operating system must provide an immediate real-time alert to the SA and ISSO, at a minimum, of all audit failure events requiring real-time alerts.

    &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-OS-000348

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  • The operating system must provide an audit reduction capability that supports on-demand audit review and analysis.

    &lt;VulnDiscussion&gt;The ability to perform on-demand audit review and analysis, including after the audit data has been subjected to audit reduct...
    Rule Low Severity
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  • SRG-OS-000349

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  • The operating system must provide an audit reduction capability that supports after-the-fact investigations of security incidents.

    &lt;VulnDiscussion&gt;If the audit reduction capability does not support after-the-fact investigations, it is difficult to establish, correlate, an...
    Rule Low Severity
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  • SRG-OS-000350

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  • The operating system must provide a report generation capability that supports on-demand audit review and analysis.

    &lt;VulnDiscussion&gt;The report generation capability must support on-demand review and analysis in order to facilitate the organization's ability...
    Rule Low Severity
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  • SRG-OS-000351

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  • The operating system must provide a report generation capability that supports on-demand reporting requirements.

    &lt;VulnDiscussion&gt;The report generation capability must support on-demand reporting in order to facilitate the organization's ability to genera...
    Rule Low Severity
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  • SRG-OS-000352

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  • The operating system must provide a report generation capability that supports after-the-fact investigations of security incidents.

    &lt;VulnDiscussion&gt;If the report generation capability does not support after-the-fact investigations, it is difficult to establish, correlate, ...
    Rule Low Severity
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  • SRG-OS-000353

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  • The operating system must not alter original content or time ordering of audit records when it provides an audit reduction capability.

    &lt;VulnDiscussion&gt;If the audit reduction capability alters the content or time ordering of audit records, the integrity of the audit records is...
    Rule Medium Severity
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  • SRG-OS-000354

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  • The operating system must not alter original content or time ordering of audit records when it provides a report generation capability.

    &lt;VulnDiscussion&gt;If the report generation capability alters the content or time ordering of audit records, the integrity of the audit records ...
    Rule Medium Severity
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  • SRG-OS-000355

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  • 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
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  • SRG-OS-000356

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  • 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
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  • SRG-OS-000358

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  • 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
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  • SRG-OS-000359

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  • 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
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  • SRG-OS-000360

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  • 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
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