Mitsubishi Electric MELSEC iQ-R Series Uncontrolled Resource Consumption (CVE-2020-13238)

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

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

if (description)
{
  script_id(500487);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2020-13238");

  script_name(english:"Mitsubishi Electric MELSEC iQ-R Series Uncontrolled Resource Consumption (CVE-2020-13238)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Mitsubishi MELSEC iQ-R Series PLCs with firmware 33 allow attackers to halt the industrial process by sending an
unauthenticated crafted packet over the network, because this denial of service attack consumes excessive CPU time.
After halting, physical access to the PLC is required in order to restore production.  

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:"http://jvn.jp/vu/JVNVU97662844/index.html");
  # https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-001_en.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?34d7c562");
  script_set_attribute(attribute:"see_also", value:"https://www.us-cert.gov/ics/advisories/icsa-20-161-02");
  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 has fixed the following versions to discard packets when specially crafted packets are received:

- R00/01/02CPU: Firmware Versions 8 or later
- R04/08/16/32/120CPU, R04/08/16/32/120ENCPU: Firmware Versions 40 or later
- R08/16/32/120SFCPU: Firmware Versions 21 or later
- R08/16/32/120PCPU: Firmware Versions 25 or later
- R08/16/32/120PSFCPU: Firmware Versions 06 or later
- RJ71EN71: Firmware Versions 50 or later

Mitsubishi Electric recommends users of the affected devices take the following measures for cyber-attacks such as DoS
attack or unauthorized access from untrusted networks or hosts.

- Connection to untrusted networks or hosts: Check whether the modules mounted in the equipment used are connected to
untrusted networks or hosts.
- Firewalls: If the modules are connected to untrusted networks or hosts, check whether measures such as firewalls are
properly configured.

Please see the publication from Mitsubishi Electric for more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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-2020-13238");

  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:"2020/06/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/10");
  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-r00cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r01cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r02cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r04cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r08cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r16cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r32cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r120cpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r08fcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r16fcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r32fcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r120fcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r08pcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r16pcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r32pcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r120pcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r08sfcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r16sfcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r32sfcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-r120sfcpu_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mitsubishielectric:melsec_iq-rj71en71_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) 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-r00cpu_firmware" :
        {"versionEndIncluding" : "7", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r01cpu_firmware" :
        {"versionEndIncluding" : "7", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r02cpu_firmware" :
        {"versionEndIncluding" : "7", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r04cpu_firmware" :
        {"versionEndIncluding" : "39", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r08cpu_firmware" :
        {"versionEndIncluding" : "39", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r16cpu_firmware" :
        {"versionEndIncluding" : "39", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r32cpu_firmware" :
        {"versionEndIncluding" : "39", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r120cpu_firmware" :
        {"versionEndIncluding" : "39", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r08fcpu_firmware" :
        {"versionEndIncluding" : "20", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r16fcpu_firmware" :
        {"versionEndIncluding" : "20", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r32fcpu_firmware" :
        {"versionEndIncluding" : "20", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r120fcpu_firmware" :
        {"versionEndIncluding" : "20", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r08pcpu_firmware" :
        {"versionEndIncluding" : "24", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r16pcpu_firmware" :
        {"versionEndIncluding" : "24", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r32pcpu_firmware" :
        {"versionEndIncluding" : "24", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r120pcpu_firmware" :
        {"versionEndIncluding" : "24", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r08sfcpu_firmware" :
        {"versionEndIncluding" : "05", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r16sfcpu_firmware" :
        {"versionEndIncluding" : "05", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r32sfcpu_firmware" :
        {"versionEndIncluding" : "05", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-r120sfcpu_firmware" :
        {"versionEndIncluding" : "05", "family" : "MELSECiQR"},
    "cpe:/o:mitsubishielectric:melsec_iq-rj71en71_firmware" :
        {"versionEndIncluding" : "49", "family" : "MELSECiQRCP"}
};

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