B&R Automation Runtime Use of a Broken or Risky Cryptographic Algorithm (CVE-2024-8603)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(503274);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/27");

  script_cve_id("CVE-2024-8603");
  script_xref(name:"ICSA", value:"25-028-01");

  script_name(english:"B&R Automation Runtime Use of a Broken or Risky Cryptographic Algorithm (CVE-2024-8603)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"B&R Automation Runtime and B&R mapp View generates self-signed
certificates during the boot-up process if no certificates have
been configured in the B&R Automation Studio project. These
certificates are signed using an algorithm, which is no longer
considered to be secure.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.br-automation.com/fileadmin/SA25P001-c478fad6.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8514adb0");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-25-028-01");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

B&R has identified the following specific workarounds and mitigations users can apply to reduce risk:

All affected products: The problem is corrected in the following product versions: B&R Automation Runtime version 6.1
and B&R mapp View 6.1. B&R recommends that customers apply the update at their earliest convenience if B&R Automation
Runtime or B&R mapp View is used to generate self-signed certificates on production machines.

To minimize the security risks of vulnerabilities in industrial automation and controls systems (IACS), B&R recommends
the implementation of their defense in depth for B&R products strategy.

For details on this issue, please refer to the corresponding B&R security advisory.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-8603");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(327);

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/01/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/13");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/BRAutomation");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/BRAutomation');

var asset = tenable_ot::assets::get(vendor:'BRAutomation');

var vuln_cpes = {
    "cpe:/a:br-automation:automation_runtime" :
        {"versionEndExcluding" : "6.1", "family" : "BRAutomation"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);