Kibana 9.x / 9.4.x < 9.4.8 / 9.5.x < 9.5.5 Incorrect Authorization (ESA-2026-193)

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

include('compat.inc');

if (description)
{
  script_id(363444);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/06");

  script_cve_id("CVE-2026-102412");

  script_name(english:"Kibana 9.x / 9.4.x < 9.4.8 / 9.5.x < 9.5.5 Incorrect Authorization (ESA-2026-193)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by an incorrect authorization vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 9.3.x, or 9.4.x prior to 9.4.8, or 9.5.x prior to 9.5.5. It is,
therefore, affected by a vulnerability as referenced in the ESA-2026-193 advisory.

  - Incorrect Authorization (CWE-863) in Kibana can lead to sensitive information disclosure via Accessing
    Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated Kibana user with limited Fleet
    management privileges could access sensitive credential material that should be restricted to users with
    Fleet settings administrative access. Successful exploitation could allow an attacker to obtain private
    cryptographic key material configured for Fleet Server host connections, potentially enabling
    impersonation of trusted Fleet infrastructure components in deployments where those keys are actively
    used. (CVE-2026-102412)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://discuss.elastic.co/t/390866");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Kibana version 9.4.8, or 9.5.5 or later as appropriate for your release branch.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N");
  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:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-102412");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/06");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:kibana");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("kibana_web_detect.nbin");
  script_require_keys("installed_sw/Kibana");
  script_require_ports("Services/www", 5601);

  exit(0);
}

include('vcf.inc');
include('http.inc');

var app = 'Kibana';

get_install_count(app_name:app, exit_if_zero:TRUE);

var port = get_http_port(default:5601);

var app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

var constraints = [
  { 'min_version' : '9.3.0', 'max_version' : '9.3.8', 'fixed_display' : 'See vendor advisory' },
  { 'min_version' : '9.4.0', 'fixed_version' : '9.4.8' },
  { 'min_version' : '9.5.0', 'fixed_version' : '9.5.5' }
];

vcf::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);