Kibana 8.19.x < 8.19.21 / 9.0.x < 9.4.6 / 9.5.x < 9.5.2 DoS (ESA-2026-125)

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

include('compat.inc');

if (description)
{
  script_id(344308);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/10");

  script_cve_id("CVE-2026-72628");
  script_xref(name:"IAVB", value:"2026-B-0244");

  script_name(english:"Kibana 8.19.x < 8.19.21 / 9.0.x < 9.4.6 / 9.5.x < 9.5.2 DoS (ESA-2026-125)");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Kibana installed on the remote host is 8.19.x prior to 8.19.21, or 9.0.x prior to 9.4.6, or 9.5.x
prior to 9.5.2. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-125 advisory.

  - Improper Handling of Highly Compressed Data (CWE-409) in Kibana can lead to a denial of service via Excessive
    Allocation (CAPEC-130). An authenticated user holding Streams management privileges could supply specially
    crafted content that expands to a far larger volume of data during processing, exhausting the memory
    available to Kibana. The Kibana process is terminated by the host and remains unavailable to all users until
    the service is restarted. (CVE-2026-72628)

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-8-19-21-9-4-6-9-5-2-security-update-esa-2026-125/390090
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?398d0d7c");
  script_set_attribute(attribute:"solution", value:
"Update to Kibana version 8.19.21, 9.4.6, 9.5.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C");
  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:N/I:N/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-2026-72628");

  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:"2026/09/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/09");

  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' : '8.19.0', 'fixed_version' : '8.19.21' },
  { 'min_version' : '9.0.0', 'fixed_version' : '9.4.6' },
  { 'min_version' : '9.5.0', 'fixed_version' : '9.5.2' }
];

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