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General Purpose Operating System Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-OS-000163

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  • The operating system must terminate all network connections associated with a communications session at the end of the session, or as follows: for in-band management sessions (privileged sessions), the session must be terminated after 10 minutes of inactivity; and for user sessions (non-privileged session), the session must be terminated after 15 minutes of inactivity, except to fulfill documented and validated mission requirements.

    &lt;VulnDiscussion&gt;Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take c...
    Rule Medium Severity
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  • SRG-OS-000184

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  • The operating system must protect the confidentiality and integrity of all information at rest.

    &lt;VulnDiscussion&gt;Information at rest refers to the state of information when it is located on a secondary storage device (e.g., disk drive and...
    Rule Medium Severity
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  • SRG-OS-000205

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  • The operating system must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

    &lt;VulnDiscussion&gt; Any operating system providing too much information in error messages risks compromising the data and security of the struct...
    Rule Medium Severity
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  • SRG-OS-000206

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  • The operating system must reveal error messages only to authorized users.

    &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-OS-000228

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  • Any publically accessible connection to the operating system must display the Standard Mandatory DoD Notice and Consent Banner before granting access to the system.

    &lt;VulnDiscussion&gt;Display of a standardized and approved use notification before granting access to the publicly accessible operating system en...
    Rule Medium Severity
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  • SRG-OS-000239

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  • The operating system must audit all account modifications.

    &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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  • The operating system must audit all account disabling actions.

    &lt;VulnDiscussion&gt;When operating system accounts are disabled, user accessibility is affected. Accounts are utilized for identifying individual...
    Rule Medium Severity
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  • SRG-OS-000241

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  • The operating system must audit all account removal actions.

    &lt;VulnDiscussion&gt;When operating system accounts are removed, user accessibility is affected. Accounts are utilized for identifying individual ...
    Rule Medium Severity
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  • SRG-OS-000250

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  • The operating system must implement cryptography to protect the integrity of remote access sessions.

    &lt;VulnDiscussion&gt;Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote acce...
    Rule High Severity
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  • SRG-OS-000254

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  • The operating system must initiate session audits at system start-up.

    &lt;VulnDiscussion&gt;If auditing is enabled late in the start-up process, the actions of some start-up processes may not be audited. Some audit sy...
    Rule Medium Severity
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  • SRG-OS-000255

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  • The operating system must produce audit records containing information to establish the identity of any individual or process associated with the event.

    &lt;VulnDiscussion&gt;Without information that establishes the identity of the subjects (i.e., users or processes acting on behalf of users) associ...
    Rule Medium Severity
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  • SRG-OS-000256

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  • The operating system must protect audit tools from unauthorized access.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
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  • SRG-OS-000257

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  • The operating system must protect audit tools from unauthorized modification.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
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  • SRG-OS-000258

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  • The operating system must protect audit tools from unauthorized deletion.

    &lt;VulnDiscussion&gt;Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefo...
    Rule Medium Severity
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  • SRG-OS-000259

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  • The operating system must limit privileges to change software resident within software libraries.

    &lt;VulnDiscussion&gt; If the operating system were to allow any user to make changes to software libraries, then those changes might be implemente...
    Rule Medium Severity
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  • SRG-OS-000266

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  • The operating system must enforce password complexity by requiring that at least one special character be used.

    &lt;VulnDiscussion&gt;Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity o...
    Rule Medium Severity
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  • SRG-OS-000269

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  • In the event of a system failure, the operating system must preserve any information necessary to determine cause of failure and any information necessary to return to operations with least disruption to mission processes.

    &lt;VulnDiscussion&gt;Failure to a known state can address safety or security in accordance with the mission/business needs of the organization. Fa...
    Rule Medium Severity
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  • SRG-OS-000274

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  • The operating system must notify system administrators and ISSOs when accounts are created.

    &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-000275

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  • The operating system must notify system administrators and ISSOs when accounts are modified.

    &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-000276

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  • The operating system must notify system administrators and ISSOs when accounts are disabled.

    &lt;VulnDiscussion&gt;When operating system accounts are disabled, user accessibility is affected. Accounts are utilized for identifying individual...
    Rule Medium Severity
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  • SRG-OS-000277

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  • The operating system must notify system administrators and ISSOs when accounts are removed.

    &lt;VulnDiscussion&gt;When operating system accounts are removed, user accessibility is affected. Accounts are utilized for identifying individual ...
    Rule Medium Severity
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  • The operating system must use cryptographic mechanisms to protect the integrity of audit tools.

    &lt;VulnDiscussion&gt;Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit in...
    Rule High Severity
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  • The operating system must automatically terminate a user session after inactivity time-outs have expired or at shutdown.

    &lt;VulnDiscussion&gt;Automatic session termination addresses the termination of user-initiated logical sessions in contrast to the termination of ...
    Rule Medium Severity
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  • SRG-OS-000280

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  • The operating system must provide a logoff capability for user-initiated communications sessions when requiring user access authentication.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end an operating system session, the session may remain open and be exploited by an attacker; thi...
    Rule Medium Severity
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  • SRG-OS-000281

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  • The operating system must display an explicit logoff message to users indicating the reliable termination of authenticated communications sessions.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end an operating system session, the session may remain open and be exploited by an attacker; thi...
    Rule Medium Severity
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  • SRG-OS-000297

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  • The operating system must control 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-000298

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