Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-Based Buffer Overflow (CVE-2021-32976)

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

include('compat.inc');

if (description)
{
  script_id(501468);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2021-32976");

  script_name(english:"Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-Based Buffer Overflow (CVE-2021-32976)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Five buffer overflows in the built-in web server in Moxa NPort
IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote
attacker to initiate a denial-of-service attack and execute arbitrary
code.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.moxa.com/en/support/product-support/security-advisory/nport-iaw5000a-io-serial-device-server-vulnerabilities
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3b7b249d");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/uscert/ics/advisories/icsa-21-187-01");
  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 solutions to address these vulnerabilities. Please contact Moxa Technical Support for a security
patch.

Moxa has also published a security advisory to provide more information.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/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: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-2021-32976");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(787);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/04/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/04/01");
  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:nport_iaw5150a-12i%2fo_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:nport_iaw5150a-6i%2fo_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:nport_iaw5250a-12i%2fo_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:nport_iaw5250a-6i%2fo_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:nport_iaw5150a-6i%2fo_firmware" :
        {"versionEndIncluding" : "2.2", "family" : "NPort"},
    "cpe:/o:moxa:nport_iaw5150a-12i%2fo_firmware" :
        {"versionEndIncluding" : "2.2", "family" : "NPort"},
    "cpe:/o:moxa:nport_iaw5250a-6i%2fo_firmware" :
        {"versionEndIncluding" : "2.2", "family" : "NPort"},
    "cpe:/o:moxa:nport_iaw5250a-12i%2fo_firmware" :
        {"versionEndIncluding" : "2.2", "family" : "NPort"}
};

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