GE UR family Exposure of Sensitive Information to an Unauthorized Actor (CVE-2021-27424)

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

include('compat.inc');

if (description)
{
  script_id(503349);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/01");

  script_cve_id("CVE-2021-27424");
  script_xref(name:"ICSA", value:"21-075-02");

  script_name(english:"GE UR family Exposure of Sensitive Information to an Unauthorized Actor (CVE-2021-27424)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"GE UR firmware versions prior to version 8.1x shares MODBUS memory map
as part of the communications guide. GE was made aware a Last-key
pressed MODBUS register can be used to gain unauthorized information.

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.cisa.gov/uscert/ics/advisories/icsa-21-075-02");
  script_set_attribute(attribute:"see_also", value:"https://www.gegridsolutions.com/Passport/Login.aspx");
  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.

GE strongly recommends users with impacted firmware versions update their UR devices to UR firmware Version 8.10, or
greater to resolve these vulnerabilities. GE provides additional mitigations and information about these vulnerabilities
in GE Publication Number: GES-2021-004 (login required).

GE recommends protecting UR IED by using network defense-in-depth practices. This includes, but is not limited to,
placing UR IED inside the control system network security perimeter, and having access controls, monitoring (such as an
Intrusion Detection System), and other mitigating technologies in place.

GE recommends users refer to the UR Deployment guide for secure configuration of UR IED and system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-27424");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(200);

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_b30_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_b90_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_c30_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_c60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_c70_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_c95_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_d30_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_d60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_f35_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_f60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_g30_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_g60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_l30_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_l60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_l90_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_m60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_n60_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_t35_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:ge:multilin_t60_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/GE");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/GE');

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

var vuln_cpes = {
    "cpe:/o:ge:multilin_b30_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_b90_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_c60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_c70_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_c95_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_d30_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_d60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_f35_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_f60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_g30_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_g60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_l30_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_l60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_l90_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_m60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_n60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_t35_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_t60_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"},
    "cpe:/o:ge:multilin_c30_firmware" :
        {"versionEndExcluding" : "8.10", "family" : "MultilinUR"}
};

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