CIS: Red Hat Enterprise Linux 9

This document provides information about the Center for Internet Security (CIS) template for Red Hat Enterprise Linux 9 Benchmark Version 1.0.0 published on November 28, 2022. This template contains implementation for 308 rules that can be deployed on TrueSight Server Automation 20.x or later.

Determine whether you need to install the template

If you have done a fresh installation of version 23.2 or later, you don't need to do anything because this template is installed as part of the 23.2 installation process.

If you have upgraded to 23.2 or later, this template is not installed automatically. To install this template, do one of the following actions:

  • Perform the steps mentioned in this topic.
    Through this method, the CIS template for Red Hat Enterprise 9 is installed.

  • Upgrade the compliance content by using one of the following methods:

    Important

    Rename any existing customized template before you run the Auto Content Import Job or install the template manually. 

    • Through the Auto Content Import Job after the upgrade. During the Application Server upgrade, the Network Shell script of this job is updated. After you upgrade TrueSight Server Automation, execute this job to obtain the latest compliance content.
      Through this method, the latest version of all the templates that are available in version 23.2 are installed. For the complete list of supported templates and their versions, see Compliance-Content-support-and-requirements.
    • Install manually by using the content installer. Ensure that you use the content installer of the same version as the Application Server version. For information about how to install the compliance content manually, see Walkthrough: Loading compliance content. 
      When you use this method, you have the flexibility to choose the template that you want to install from the set of templates that are available in version 23.2.

Before you begin

Before you import this template, ensure that the following requirements are met:

  • Review the default values of the template's local and global properties and ensure that they meet the organization standards.
  • Rename any existing customized template before you import the latest template.
  • Back up the sensors folder located in the <AppServerInstallDir>/share directory on all the Application Servers in a multiple Application Server environment. This folder contains the extended object scripts.

Step 1: Download the files

  1. Access the following EPD link and click TSSA 23.1.00 CIS Updates for Red Hat Enterprise Linux 9 to download the CIS - Red Hat Enterprise Linux 9 package:
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  2. Verify the downloaded content by using the following checksums.

    Expand to view the checksum-related information


    S.No

    File Name

    MD5SUM

    1

    CIS - Red Hat Enterprise Linux 9.zip

    ebce9121f2fe3d55417cfa1fba0e7ad0

    2

    ExtendedObjects.zip

    323ba696616470ba1f90445a51facfe5

  3. Extract the contents of ExtendedObjects.zip to a temporary directory and copy the extracted files to the existing <APPRSERVER_INSTALL_DIR>/share/sensors directory on all the Application Servers.
  4. Move CIS - Red Hat Enterprise Linux 9.zip to the server where the TrueSight Server Automation console is installed.

Step 2: Import the Compliance Content

  1. Log in to the TrueSight Server Automation console.
  2. Right-click Component template and select Import.
    disa 2019 import.png

  3. Select the Import (Version-neutral) option and click OK.
    disa 2019 version neutral.png

  4. Select the CIS - Red Hat Enterprise Linux 9.zip package from the temporary location and click Next.

    The CIS template for CIS - Red Hat Enterprise Linux 9 is available in the CIS - Red Hat Enterprise Linux 9.zip package.

    image-2023-4-28_11-27-18-1.png

  5. To import the template, select CIS - Red Hat Enterprise Linux 9 and click Next.
  6. Ensure that the Update objects according to the imported package and Preserve template group path options are selected, and click Next.
    image-2023-4-28_12-48-9-1.png
  7. Navigate to the last screen of the wizard and then click Finish.

  8. The template is imported successfully. Click OK.
    The imported template is shown under  CIS Compliance Content  >  CIS.

    image-2023-4-28_11-28-43-1.png

Rules within the template

The 308 rules provided in the zip package contain the following types of rules:

  • Rules that check for compliance (audit) and provide remediation - 245
  • Rules that check for compliance(audit) but do not provide remediation - 55
  • Rules that do not check for compliance and do not provide remediation - 8

The following are the details of the rules that are divided into parts:

  • Rules not divided into parts = 236
  • Rules divided into two parts (14 Rules) so (14* 2) = 28
  • Rules divided into three parts (7 Rules) so (7 * 3) = 21
  • Rules divided into four parts (2 Rules) so (2 * 4) = 8
  • Rules divided into six parts (3 Rules) so (3 * 6) = 18

The current rule count according to CIS Red Hat Enterprise 9 template after running the compliance job is 308 (236+28+21+8+18).

 

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