Mitsubishi (CVE-2019-14931) - Nessus

Critical Plugin ID: 500598

This page contains detailed information about the Mitsubishi (CVE-2019-14931) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 500598
Name: Mitsubishi (CVE-2019-14931)
Filename: tenable_ot_mitsubishi_CVE-2019-14931.nasl
Vulnerability Published: 2019-10-28
This Plugin Published: 2022-02-07
Last Modification Time: 2022-02-07
Plugin Version: 1.1
Plugin Type: remote
Plugin Family: Tenable.ot
Dependencies: tenable_ot_api_integration.nasl
Required KB Items [?]: Tenable.ot/Mitsubishi

Vulnerability Information

Severity: Critical
Vulnerability Published: 2019-10-28
Patch Published: 2019-10-28
CVE [?]: CVE-2019-14931
CPE [?]: cpe:/o:mitsubishielectric:smartrtu_firmware

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered on Mitsubishi Electric ME-RTU devices through 2.02 and INEA ME-RTU devices through 3.0. An unauthenticated remote OS Command Injection vulnerability allows an attacker to execute arbitrary commands on the RTU due to the passing of unsafe user supplied data to the RTU's system shell. Functionality in mobile.php provides users with the ability to ping sites or IP addresses via Mobile Connection Test. When the Mobile Connection Test is submitted, action.php is called to execute the test. An attacker can use a shell command separator (;) in the host variable to execute operating system commands upon submitting the test data.

This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Exploit-DB)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Mitsubishi (CVE-2019-14931) vulnerability:

Exploit-DB: exploits/php/webapps/47235.py
[EDB-47235: Mitsubishi Electric smartRTU / INEA ME-RTU - Unauthenticated OS Command Injection Bind Shell]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2019-14931
CVSS V2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Base Score:	10.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	10.0
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	10.0 (High)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	NA (None)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.8 (Critical)

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Plugin Source

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

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

if (description)
{
  script_id(500598);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/07");

  script_cve_id("CVE-2019-14931");

  script_name(english:"Mitsubishi (CVE-2019-14931)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"An issue was discovered on Mitsubishi Electric ME-RTU devices through 2.02 and INEA ME-RTU devices through 3.0. An
unauthenticated remote OS Command Injection vulnerability allows an attacker to execute arbitrary commands on the RTU
due to the passing of unsafe user supplied data to the RTU's system shell. Functionality in mobile.php provides users
with the ability to ping sites or IP addresses via Mobile Connection Test. When the Mobile Connection Test is submitted,
action.php is called to execute the test. An attacker can use a shell command separator (;) in the host variable to
execute operating system commands upon submitting the test data.  

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://www.mogozobo.com/");
  script_set_attribute(attribute:"see_also", value:"https://www.mogozobo.com/?p=3593");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-14931");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(78);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/28");
  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:smartrtu_firmware");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 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:smartrtu_firmware" :
        {"versionEndIncluding" : "2.02"}
};

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

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/tenable_ot_mitsubishi_CVE-2019-14931.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\tenable_ot_mitsubishi_CVE-2019-14931.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/tenable_ot_mitsubishi_CVE-2019-14931.nasl

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How to Run

Here is how to run the Mitsubishi (CVE-2019-14931) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Tenable.ot plugin family.
On the right side table select Mitsubishi (CVE-2019-14931) plugin ID 500598.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl tenable_ot_mitsubishi_CVE-2019-14931.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a tenable_ot_mitsubishi_CVE-2019-14931.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - tenable_ot_mitsubishi_CVE-2019-14931.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state tenable_ot_mitsubishi_CVE-2019-14931.nasl -t <IP/HOST>

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References

CWE | Common Weakness Enumeration:

CWE-78 (Weakness) Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

See also:

Similar and related Nessus plugins:

500534 - Mitsubishi (CVE-2018-16060)
500518 - Mitsubishi (CVE-2018-16061)
500529 - Mitsubishi (CVE-2019-14927)
500532 - Mitsubishi (CVE-2020-12009)
72708 - Mitsubishi Electric Automation MC-WorX 8.x ActiveX Control Remote Code Execution
66761 - Mitsubishi MX Component ActiveX Remote Code Execution

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file tenable_ot_mitsubishi_CVE-2019-14931.nasl version 1.1. For more plugins, visit the Nessus Plugin Library.

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Mitsubishi (CVE-2019-14931) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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