Mitsubishi Electric MELSEC iQ-R Null Pointer Dereference (CVE-2020-5655)

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

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

if (description)
{
  script_id(500554);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/04");

  script_cve_id("CVE-2020-5655");
  script_xref(name:"ICSA", value:"20-303-02");

  script_name(english:"Mitsubishi Electric MELSEC iQ-R Null Pointer Dereference (CVE-2020-5655)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"NULL pointer dereferences vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91
EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller
Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of
serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before,
and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated
attacker to stop the network functions of the products via a specially crafted 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/2020-012_en.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?68cc937d");
  script_set_attribute(attribute:"see_also", value:"https://jvn.jp/vu/JVNVU92513419/index.html");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-20-303-02");
  # https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?51cd1baa");
  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 take the following mitigation measures to minimize the risk of exploiting these
vulnerabilities:

- Block access from untrusted networks and hosts through firewalls.

Please refer to Mitsubishi Electric’s website for details on available patches. Mitsubishi recommends users update their
products by downloading and applying the latest versions. Please contact a Mitsubishi Electric representative for
additional details.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/UI:N/S:U/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-2020-5655");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(476);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/02");
  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-rj71eip91_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-rj71pn92_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-rd81dl96_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-rd81mes96n_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-rd81opc96_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-rj71eip91_firmware:-" :
        {"family" : "MELSECiQRCP"},
    "cpe:/o:mitsubishielectric:melsec_iq-rj71pn92_firmware:-" :
        {"family" : "MELSECiQRCP"},
    "cpe:/o:mitsubishielectric:melsec_iq-rd81dl96_firmware:-" :
        {"family" : "MELSECiQRCP"},
    "cpe:/o:mitsubishielectric:melsec_iq-rd81mes96n_firmware:-" :
        {"family" : "MELSECiQRCP"},
    "cpe:/o:mitsubishielectric:melsec_iq-rd81opc96_firmware:-" :
        {"family" : "MELSECiQRCP"}
};

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