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General Purpose Operating System Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000001

    <GroupDescription></GroupDescription>
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  • The operating system must provide automated mechanisms for supporting account management functions.

    &lt;VulnDiscussion&gt;Enterprise environments make account management challenging and complex. A manual process for account management functions ad...
    Rule Medium Severity
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  • SRG-OS-000002

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  • The operating system must automatically remove or disable temporary user accounts after 72 hours.

    &lt;VulnDiscussion&gt;If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain...
    Rule Medium Severity
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  • SRG-OS-000004

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  • The operating system must audit all account creations.

    &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-000021

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  • The operating system must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

    &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-000023

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  • The operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting local or remote access to the system.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the operating system ensures privacy and se...
    Rule Medium Severity
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  • SRG-OS-000024

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  • The operating system must display the Standard Mandatory DoD Notice and Consent Banner until users acknowledge the usage conditions and take explicit actions to log on for further access.

    &lt;VulnDiscussion&gt;The banner must be acknowledged by the user prior to allowing the user access to the operating system. This provides assuranc...
    Rule Medium Severity
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  • SRG-OS-000027

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  • The operating system must limit the number of concurrent sessions to ten for all accounts and/or account types.

    &lt;VulnDiscussion&gt;Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...
    Rule Low Severity
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  • SRG-OS-000028

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  • The operating system must retain a users session lock until that user reestablishes access using established identification and authentication procedures.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000029

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  • The operating system must initiate a session lock after a 15-minute period of inactivity for all connection types.

    &lt;VulnDiscussion&gt;A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinit...
    Rule Medium Severity
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  • SRG-OS-000030

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  • The operating system must provide the capability for users to directly initiate a session lock for all connection types.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000031

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  • The operating system must conceal, via the session lock, information previously visible on the display with a publicly viewable image.

    &lt;VulnDiscussion&gt;A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...
    Rule Medium Severity
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  • SRG-OS-000032

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  • The operating system must monitor remote access methods.

    &lt;VulnDiscussion&gt;Remote access services, such as those providing remote access to network devices and information systems, which lack automate...
    Rule Medium Severity
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  • SRG-OS-000033

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  • The operating system must implement DoD-approved encryption to protect the confidentiality of remote access sessions.

    &lt;VulnDiscussion&gt;Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote...
    Rule High Severity
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  • SRG-OS-000037

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  • The operating system must produce audit records containing information to establish what type of events occurred.

    &lt;VulnDiscussion&gt;Without establishing what type of events occurred, it would be difficult to establish, correlate, and investigate the events ...
    Rule Medium Severity
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  • SRG-OS-000038

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  • The operating system must produce audit records containing information to establish when (date and time) the events occurred.

    &lt;VulnDiscussion&gt;Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to...
    Rule Medium Severity
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  • SRG-OS-000039

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  • The operating system must produce audit records containing information to establish where the events occurred.

    &lt;VulnDiscussion&gt;Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up t...
    Rule Medium Severity
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  • SRG-OS-000040

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  • The operating system must produce audit records containing information to establish the source of the events.

    &lt;VulnDiscussion&gt;Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up...
    Rule Medium Severity
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  • SRG-OS-000041

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  • The operating system must produce audit records containing information to establish the outcome of the events.

    &lt;VulnDiscussion&gt;Without information about the outcome of events, security personnel cannot make an accurate assessment as to whether an attac...
    Rule Medium Severity
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  • SRG-OS-000042

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  • The operating system must generate audit records containing the full-text recording of privileged commands.

    &lt;VulnDiscussion&gt;Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At...
    Rule Medium Severity
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  • SRG-OS-000042

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  • The operating system must produce audit records containing the individual identities of group account users.

    &lt;VulnDiscussion&gt;Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At...
    Rule Medium Severity
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  • SRG-OS-000046

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  • The operating system must alert the ISSO and SA (at a minimum) in the event of an audit processing failure.

    &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-000047

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  • The operating system must shut down by default upon audit failure (unless availability is an overriding concern).

    &lt;VulnDiscussion&gt;It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mit...
    Rule Medium Severity
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  • SRG-OS-000051

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  • The operating system must provide the capability to centrally review and analyze audit records from multiple components within the system.

    &lt;VulnDiscussion&gt;Successful incident response and auditing relies on timely, accurate system information and analysis in order to allow the or...
    Rule Medium Severity
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  • SRG-OS-000054

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  • The operating system must provide the capability to filter audit records for events of interest based upon all audit fields within audit records.

    &lt;VulnDiscussion&gt;The ability to specify the event criteria that are of interest provides the individuals reviewing the logs with the ability t...
    Rule Medium Severity
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  • SRG-OS-000055

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  • The operating system must use internal system clocks to generate time stamps for audit records.

    &lt;VulnDiscussion&gt;Without an internal clock used as the reference for the time stored on each event to provide a trusted common reference for t...
    Rule Medium Severity
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