Elastic Kibana HTML Injection Vulnerability (ESA-2021-23)

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:elastic:kibana";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117700");
  script_version("2023-10-20T16:09:12+0000");
  script_tag(name:"last_modification", value:"2023-10-20 16:09:12 +0000 (Fri, 20 Oct 2023)");
  script_tag(name:"creation_date", value:"2021-09-27 11:31:59 +0000 (Mon, 27 Sep 2021)");
  script_tag(name:"cvss_base", value:"5.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-11-22 20:28:00 +0000 (Tue, 22 Nov 2022)");

  script_cve_id("CVE-2021-37936");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Elastic Kibana HTML Injection Vulnerability (ESA-2021-23)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Web application abuses");
  script_dependencies("gb_elastic_kibana_detect_http.nasl");
  script_mandatory_keys("elastic/kibana/detected");

  script_tag(name:"summary", value:"Elastic Kibana is prone to an HTML injection vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"It was discovered that kibana was not sanitizing document fields
  containing html snippets. Using this vulnerability, an attacker with the ability to write
  documents to an elasticsearch index could inject HTML. When the Discover app highlighted a search
  term containing the HTML, it would be rendered for the user.");

  script_tag(name:"affected", value:"Elastic Kibana version 7.14.0 only.");

  script_tag(name:"solution", value:"Update to version 7.14.1 or later.

  Mitigation: Users can set 'doc_table:highlight' to 'false' in the Kibana Advanced Settings.");

  script_xref(name:"URL", value:"https://discuss.elastic.co/t/elastic-stack-7-14-1-security-update/283077");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_equal(version: version, test_version: "7.14.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.14.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);