Kibana 8.5.x < 8.19.20 / 9.x < 9.4.5 Missing Authorization (ESA-2026-96)

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

include('compat.inc');

if (description)
{
  script_id(338729);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/21");

  script_cve_id("CVE-2026-72665");
  script_xref(name:"IAVB", value:"2026-B-0232");

  script_name(english:"Kibana 8.5.x < 8.19.20 / 9.x < 9.4.5 Missing Authorization (ESA-2026-96)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a missing authorization vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 8.5.x prior to 8.19.20, or 9.x prior to 9.4.5. It is,
therefore, affected by a vulnerability as referenced in the ESA-2026-96 advisory.

  - Missing Authorization (CWE-862) in Kibana can lead to unauthorized execution of Osquery and Elastic Defend
    response actions on managed hosts via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). A
    Kibana user who is able to author and evaluate Elastic Security detection rules can cause response actions
    to be carried out against enrolled agents without holding the Osquery live query privileges or the Elastic
    Defend response action privileges that normally govern those capabilities. Depending on the response action
    involved, this can result in disclosure of information from the affected hosts or in unauthorized changes
    to their state. (CVE-2026-72665)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported
version number.");
  # https://discuss.elastic.co/t/kibana-8-19-20-and-9-4-5-security-update-esa-2026-96/389528
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c66acf27");
  script_set_attribute(attribute:"solution", value:
"Update to Kibana version 8.19.20, 9.4.5 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-72665");

  script_cwe_id(862);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/21");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:kibana");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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('http.inc');
include('vcf.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' : '8.5.0', 'fixed_version' : '8.19.20' },
  { 'min_version' : '9.0.0', 'fixed_version' : '9.4.5' }
];

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