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I - Mission Critical Public

Rules and Groups employed by this XCCDF Profile

  • SRG-OS-000324

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

    Preventing non-privileged users from executing privileged functions mitigates the risk that unauthorized individuals or processes may gain unnecessary access to information or privileges. Privileg...
    Rule High Severity
  • SRG-OS-000326

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

    In certain situations, software applications/programs need to execute with elevated privileges to perform required functions. However, if the privileges required for execution are at a higher level...
    Rule Medium Severity
  • SRG-OS-000327

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

    Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and...
    Rule Medium Severity
  • SRG-OS-000329

    Group
  • 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.

    By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the a...
    Rule Medium Severity
  • SRG-OS-000337

    Group
  • 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.

    If authorized individuals do not have the ability to modify auditing parameters in response to a changing threat environment, the organization may not be able to effectively respond, and important ...
    Rule Medium Severity
  • SRG-OS-000341

    Group
  • 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.

    In order to ensure operating systems have a sufficient storage capacity in which to write the audit logs, operating systems need to be able to allocate audit record storage capacity. The task of a...
    Rule Low Severity
  • SRG-OS-000342

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

    Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity.
    Rule Low Severity
  • SRG-OS-000343

    Group
  • 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.

    If security personnel are not notified immediately when storage volume reaches 75% utilization, they are unable to plan for audit record storage capacity expansion.
    Rule Low Severity
  • SRG-OS-000344

    Group
  • 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.

    It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without a real-time alert, security personnel may be unaware of an impe...
    Rule Medium Severity
  • SRG-OS-000348

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

    The ability to perform on-demand audit review and analysis, including after the audit data has been subjected to audit reduction, greatly facilitates the organization's ability to generate incident...
    Rule Low Severity

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