Moxa EDS-G516E and EDS-510E Series Ethernet Switches Weak Password Requirements (CVE-2020-6991)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(501560);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2020-6991");

  script_name(english:"Moxa EDS-G516E and EDS-510E Series Ethernet Switches Weak Password Requirements (CVE-2020-6991)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"In Moxa EDS-G516E Series firmware, Version 5.2 or lower, weak password
requirements may allow an attacker to gain access using brute force.

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.us-cert.gov/ics/advisories/icsa-20-056-04");
  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.

Moxa has developed the following solutions to address the vulnerabilities:

- EDS-G516E Series: Download the new firmware.
- EDS-510E Series: please contact Moxa Technical Support for assistance.
- Enable password on configuration file from “Configuration File Encryption” setting to eliminate the potential risk.
- Enable HTTPS from the “Management Interface” setting.
- Enable “Account Login Failure Lockout” functions to eliminate the potential risk.

Please see Moxa’s security advisory for more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:H/I:H/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-2020-6991");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(521);

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:eds-510e_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:eds-g516e_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Moxa");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Moxa');

var asset = tenable_ot::assets::get(vendor:'Moxa');

var vuln_cpes = {
    "cpe:/o:moxa:eds-g516e_firmware" :
        {"versionEndIncluding" : "5.2", "family" : "MoxaEDS"},
    "cpe:/o:moxa:eds-510e_firmware" :
        {"versionEndIncluding" : "5.2", "family" : "MoxaEDS"}
};

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