Barco ClickShare Devices Improper Certificate Validation (CVE-2019-18826)

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

include('compat.inc');

if (description)
{
  script_id(503362);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/09");

  script_cve_id("CVE-2019-18826");

  script_name(english:"Barco ClickShare Devices Improper Certificate Validation (CVE-2019-18826)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Barco ClickShare Button R9861500D01 devices before 1.9.0 have Improper
Following of a Certificate's Chain of Trust. The embedded
'dongle_bridge' program used to expose the functionalities of the
ClickShare Button to a USB host, does not properly validate the whole
certificate chain.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://www.barco.com/en/clickshare/firmware-update");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  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:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-18826");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(295);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/09");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:barco:clickshare_cs-100_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:barco:clickshare_cse-200%2b_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:barco:clickshare_cse-200_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:barco:clickshare_cse-800_firmware");
  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/Barco");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Barco');

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

var vuln_cpes = {
    "cpe:/o:barco:clickshare_cs-100_firmware" :
        {"versionEndExcluding" : "1.9.0", "family" : "ClickShare"},
    "cpe:/o:barco:clickshare_cse-200_firmware" :
        {"versionEndExcluding" : "1.9.0", "family" : "ClickShare"},
    "cpe:/o:barco:clickshare_cse-200%2b_firmware" :
        {"versionEndExcluding" : "1.9.0", "family" : "ClickShare"},
    "cpe:/o:barco:clickshare_cse-800_firmware" :
        {"versionEndExcluding" : "1.9.0", "family" : "ClickShare"}
};

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