Wago 750-36X & 750-8XX Improper Authentication (CVE-2021-34578)

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(500686);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/17");

  script_cve_id("CVE-2021-34578");

  script_name(english:"Wago 750-36X & 750-8XX Improper Authentication (CVE-2021-34578)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by
sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.

  - This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of
    the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in
    firmware versions up to FW07. (CVE-2021-34578)

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://cert.vde.com/en-us/advisories/vde-2020-044");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/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-2021-34578");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(287);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/21");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-362_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-363_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-823_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-832%2f000-002_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-832_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-862_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-890%2f025-000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-890%2f025-001_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-890%2f025-002_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-890%2f040-000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-891_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:wago:750-893_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) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Wago');

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

var vuln_cpes = {
    "cpe:/o:wago:750-890%2f040-000_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-890%2f025-001_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-890%2f025-002_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-890%2f025-000_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-832%2f000-002_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-362_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-823_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "ControllerPFC200"},
    "cpe:/o:wago:750-832_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-363_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-862_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-891_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"},
    "cpe:/o:wago:750-893_firmware" :
        {"versionEndIncluding" : "fw07", "family" : "Controller750"}
};

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