Mitsubishi Electric MELSEC iQ-F Series Improper Check or Handling of Exceptional Conditions (CVE-2020-5665)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(500590);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/04");

  script_cve_id("CVE-2020-5665");
  script_xref(name:"ICSA", value:"20-345-01");

  script_name(english:"Mitsubishi Electric MELSEC iQ-F Series Improper Check or Handling of Exceptional Conditions (CVE-2020-5665)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Improper check or handling of exceptional conditions in MELSEC iQ-F series FX5U(C) CPU unit firmware version 1.060 and
earlier allows an attacker to cause a denial-of-service (DoS) condition on program execution and communication by
sending a specially crafted ARP packet.  

This plugin only works with Tenable.ot. Please visit
https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-018_en.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24d82ee2");
  script_set_attribute(attribute:"see_also", value:"https://jvn.jp/vu/JVNVU95638588/index.html");
  # https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-018.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e9055380");
  script_set_attribute(attribute:"see_also", value:"https://us-cert.cisa.gov/ics/advisories/icsa-20-345-01");
  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.

Mitsubishi Electric recommends users update firmware to Version 1.061 or later.

Mitsubishi Electric recommends users take the following mitigation measures to minimize risk associated with this
vulnerability:

- Use a firewall or virtual private network to prevent unauthorized access when Internet access is required.
- Use within the LAN and ensure that they are not accessible from untrusted networks and hosts.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-5665");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-f_fx5u_cpu_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Mitsubishi');

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

var vuln_cpes = {
    "cpe:/o:mitsubishielectric:melsec_iq-f_fx5u_cpu_firmware" :
        {"versionEndIncluding" : "1.060", "family" : "MELSECiQF"}
};

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