Generex UPS Adapter CS141 Authenticated Remote Code Execution (CVE-2022-42457)

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

include('compat.inc');

if (description)
{
  script_id(503965);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/13");

  script_cve_id("CVE-2022-42457");

  script_name(english:"Generex UPS Adapter CS141 Authenticated Remote Code Execution (CVE-2022-42457)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Generex CS141 through 2.10 allows remote command execution by
administrators via a web interface that reaches run_update in
/usr/bin/gxserve-update.sh (e.g., command execution can occur via a
reverse shell installed by install.sh).

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://github.com/hubertfarnsworth12/Generex-CS141-Authenticated-Remote-Command-Execution
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?114145d8");
  # https://github.dev/hubertfarnsworth12/Generex-CS141-Authenticated-Remote-Command-Execution
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?147ca1e8");
  script_set_attribute(attribute:"see_also", value:"https://www.generex.de/products/ups/");
  script_set_attribute(attribute:"see_also", value:"https://www.generex.de/support/downloads/ups/cs141");
  script_set_attribute(attribute:"see_also", value:"https://www.generex.de/support/downloads/ups/cs141/update");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-42457");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/10/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/11/13");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:generex:cs141_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) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Generex');

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

var vuln_cpes = {
    "cpe:/o:generex:cs141_firmware" :
        {"versionEndIncluding" : "2.10", "family" : "CS141"}
};

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