EPSON Printers Improper Input Validation (CVE-2023-38556)

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

include('compat.inc');

if (description)
{
  script_id(505064);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/06");

  script_cve_id("CVE-2023-38556");

  script_name(english:"EPSON Printers Improper Input Validation (CVE-2023-38556)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Improper input validation vulnerability in SEIKO EPSON printer Web
Config allows a remote attacker to turned off the printer. [Note] Web
Config is the software that allows users to check the status and
change the settings of SEIKO EPSON printers via a web browser. Web
Config is pre-installed in some printers provided by SEIKO EPSON
CORPORATION. For the details of the affected product names/model
numbers, refer to the information provided by the vendor.

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://jvn.jp/en/jp/JVN61337171/");
  script_set_attribute(attribute:"see_also", value:"https://www.epson.jp/support/misc_t/230802_oshirase.htm");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  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-2023-38556");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20);

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/08/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/05");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:ep-801a_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:ep-802a_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:ep-901a_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:ep-901f_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:ep-902a_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:pa-tcu1_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:pm-t960_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:pm-t990_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:px-201_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:px-502a_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:px-601f_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:epson:px-602f_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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/EPSON');

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

var vuln_cpes = {
    "cpe:/o:epson:ep-801a_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:ep-802a_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:ep-901a_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:ep-901f_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:ep-902a_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:pa-tcu1_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:pm-t960_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:pm-t990_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:px-201_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:px-502a_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:px-601f_firmware:-" :
        {"family" : "EPSON"},
    "cpe:/o:epson:px-602f_firmware:-" :
        {"family" : "EPSON"}
};

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