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nessusThis script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.TENABLE_OT_MITSUBISHI_CVE-2020-5657.NASL
HistoryFeb 07, 2022 - 12:00 a.m.

Mitsubishi Electric MELSEC iQ-R Improper Neutralization of Argument Delimiters in a Command (CVE-2020-5657)

2022-02-0700:00:00
This script is Copyright (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12

3.3 Low

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:L/Au:N/C:N/I:N/A:P

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

31.8%

Improper neutralization of argument delimiters in a command (β€˜Argument Injection’) 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 β€˜02’ or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are β€˜01’ or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are β€˜08’ or before, RD81MES96N MES Interface Module First 2 digits of serial number are β€˜04’ or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are β€˜04’ or before) allows unauthenticated attackers on adjacent network 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.

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

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

if (description)
{
  script_id(500493);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/11");

  script_cve_id("CVE-2020-5657");

  script_name(english:"Mitsubishi Electric MELSEC iQ-R Improper Neutralization of Argument Delimiters in a Command (CVE-2020-5657)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Improper neutralization of argument delimiters in a command ('Argument Injection') 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 unauthenticated attackers on adjacent network 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 ElectricҀ™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: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: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-2020-5657");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(88);

  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_NOTE);
VendorProductVersionCPE
mitsubishielectricmelsec_iq-rj71pn92_firmware-cpe:/o:mitsubishielectric:melsec_iq-rj71pn92_firmware:-
mitsubishielectricmelsec_iq-rd81dl96_firmware-cpe:/o:mitsubishielectric:melsec_iq-rd81dl96_firmware:-
mitsubishielectricmelsec_iq-rd81opc96_firmware-cpe:/o:mitsubishielectric:melsec_iq-rd81opc96_firmware:-
mitsubishielectricmelsec_iq-rj71eip91_firmware-cpe:/o:mitsubishielectric:melsec_iq-rj71eip91_firmware:-
mitsubishielectricmelsec_iq-rd81mes96n_firmware-cpe:/o:mitsubishielectric:melsec_iq-rd81mes96n_firmware:-

3.3 Low

CVSS2

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:A/AC:L/Au:N/C:N/I:N/A:P

6.5 Medium

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

31.8%

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