Mitsubishi Electric MELSEC Uncontrolled Resource Consumption (CVE-2020-5527)

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

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

if (description)
{
  script_id(500364);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/09/04");

  script_cve_id("CVE-2020-5527");
  script_xref(name:"ICSA", value:"20-091-02");

  script_name(english:"Mitsubishi Electric MELSEC Uncontrolled Resource Consumption (CVE-2020-5527)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"When MELSOFT transmission port (UDP/IP) of Mitsubishi Electric MELSEC iQ-R series (all versions), MELSEC iQ-F series
(all versions), MELSEC Q series (all versions), MELSEC L series (all versions), and MELSEC F series (all versions)
receives massive amount of data via unspecified vectors, resource consumption occurs and the port does not process the
data properly. As a result, it may fall into a denial-of-service (DoS) condition. The vendor states this vulnerability
only affects Ethernet communication functions.  

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://jvn.jp/en/vu/JVNVU91553662/index.html");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-20-091-02");
  # https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2019-005_en.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?06dadf59");
  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.

In the user manual for this device, Mitsubishi Electric recommends implementing one or both of the following:

- Install a firewall.
- Use the IP filter function to restrict the connectable IP addresses.

Additional information about the vulnerability is available by contacting a Mitsubishi Electric representative.");
  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-2020-5527");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/30");
  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:fx3g_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx3gc_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx3s_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx3u_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx3uc_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx5u_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx5uc_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:fx5uj_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l02cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l02cpu-p_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l02scpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l02scpu-p_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l06cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l06cpu-p_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l26cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l26cpu-bt_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l26cpu-p_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:l26cpu-pbt_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q02phcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q06phcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q12dccpu-v_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q12phcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q12prhcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q172dscpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q173dscpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q173nccpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q24dhccpu-ls_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q24dhccpu-v_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q24dhccpu-vg2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q25phcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q25prhcpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:q26dhccpu-ls_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r00cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r01cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r02cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r04cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r04encpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r08cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r08encpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r120cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r120encpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r16cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r16encpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r32cpu_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:r32encpu_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:fx3g_firmware:-" :
        {"family" : "MELSECF"},
    "cpe:/o:mitsubishielectric:fx3gc_firmware:-" :
        {"family" : "MELSECF"},
    "cpe:/o:mitsubishielectric:fx3s_firmware:-" :
        {"family" : "MELSECF"},
    "cpe:/o:mitsubishielectric:fx3u_firmware:-" :
        {"family" : "MELSECF"},
    "cpe:/o:mitsubishielectric:fx3uc_firmware:-" :
        {"family" : "MELSECF"},
    "cpe:/o:mitsubishielectric:fx5u_firmware:-" :
        {"family" : "MELSECiQF"},
    "cpe:/o:mitsubishielectric:fx5uc_firmware:-" :
        {"family" : "MELSECiQF"},
    "cpe:/o:mitsubishielectric:fx5uj_firmware:-" :
        {"family" : "MELSECiQF"},
    "cpe:/o:mitsubishielectric:l02cpu_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l02cpu-p_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l02scpu_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l02scpu-p_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l06cpu_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l06cpu-p_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l26cpu_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l26cpu-bt_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l26cpu-p_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:l26cpu-pbt_firmware:-" :
        {"family" : "MELSECL"},
    "cpe:/o:mitsubishielectric:q02phcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q06phcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q12dccpu-v_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q12phcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q12prhcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q172dscpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q173dscpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q173nccpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q24dhccpu-ls_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q24dhccpu-v_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q24dhccpu-vg2_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q25phcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q25prhcpu_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:q26dhccpu-ls_firmware:-" :
        {"family" : "MELSECQ"},
    "cpe:/o:mitsubishielectric:r00cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r01cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r02cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r04cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r04encpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r08cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r08encpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r120cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r120encpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r16cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r16encpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r32cpu_firmware:-" :
        {"family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:r32encpu_firmware:-" :
        {"family" : "MELSECiQR"}
};

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