B&R Automation Studio and Automation Runtime Improper Authorization (CVE-2019-19108)

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

include('compat.inc');

if (description)
{
  script_id(503273);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/13");

  script_cve_id("CVE-2019-19108");
  script_xref(name:"ICSA", value:"20-051-01");

  script_name(english:"B&R Automation Studio and Automation Runtime Improper Authorization (CVE-2019-19108)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"An authentication weakness in the SNMP service in B&R Automation
Runtime versions 2.96, 3.00, 3.01, 3.06 to 3.10, 4.00 to 4.63, 4.72
and above allows unauthenticated users to modify the configuration of
B&R products via SNMP.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.br-automation.com/downloads_br_productcatalogue/assets/1587069861821-en-original-1.0.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31c04ec9");
  script_set_attribute(attribute:"see_also", value:"https://www.us-cert.gov/ics/advisories/icsa-20-051-01");
  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 reports product-technical reasons disallow the changing of SNMP credentials. To reduce risk from this vulnerability,
the following Automation Studio versions disable the SNMP service by default in newly created AS projects:

- AS 4.6.5 (Planned release date: 2020-03-27) and higher
- AS 4.7.3 (Planned release date: 2020-04-10) and higher
- AS 4.8.2 (Planned release date: 2020-06-11) and higher

B&R reports the above-mentioned dates denoted as planned are preliminary and may be subject to change. Registered users
may approach their local B&R service organization in case of questions. B&R recommends that affected users evaluate
their need for the SNMP service and disable it if possible. For more information related to this vulnerability please
refer to the B&R advisory. For additional information and support, please contact B&R service.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-19108");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(285);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/20");
  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:2.96");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:3");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:3.00");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:3.01");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:3.06");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:3.07");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:4");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:br-automation:automation_runtime:4.72");
  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 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:3" :
        {"versionEndIncluding" : "3.10", "versionStartIncluding" : "3.08", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:4" :
        {"versionEndIncluding" : "4.03", "versionStartIncluding" : "4.00", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:4" :
        {"versionEndIncluding" : "4.63", "versionStartIncluding" : "4.04", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:2.96" :
        {"versionEndIncluding" : "2.96", "versionStartIncluding" : "2.96", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:3.00" :
        {"versionEndIncluding" : "3.00", "versionStartIncluding" : "3.00", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:3.01" :
        {"versionEndIncluding" : "3.01", "versionStartIncluding" : "3.01", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:3.06" :
        {"versionEndIncluding" : "3.06", "versionStartIncluding" : "3.06", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:3.07" :
        {"versionEndIncluding" : "3.07", "versionStartIncluding" : "3.07", "family" : "BRAutomation"},
    "cpe:/a:br-automation:automation_runtime:4.72" :
        {"versionEndIncluding" : "4.72", "versionStartIncluding" : "4.72", "family" : "BRAutomation"}
};

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