Elastic Elasticsearch Information Disclosure Vulnerability (ESA-2021-18)

# 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:elasticsearch";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.146711");
  script_version("2021-09-27T08:01:28+0000");
  script_tag(name:"last_modification", value:"2021-09-27 08:01:28 +0000 (Mon, 27 Sep 2021)");
  script_tag(name:"creation_date", value:"2021-09-16 07:40:35 +0000 (Thu, 16 Sep 2021)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-09-25 11:20:00 +0000 (Sat, 25 Sep 2021)");

  script_cve_id("CVE-2021-22147");

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

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

  script_name("Elastic Elasticsearch Information Disclosure Vulnerability (ESA-2021-18)");

  script_category(ACT_GATHER_INFO);

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

  script_tag(name:"summary", value:"Elasticsearch is prone to an information disclosure vulnerability.");

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

  script_tag(name:"insight", value:"A flaw was discovered in Elasticsearch where document and field
  level security was not applied to searchable snapshots. This could lead to an authenticated user
  gaining access to information that they are unauthorized to view.");

  script_tag(name:"affected", value:"Elasticsearch version 7.11.0 through 7.13.4.");

  script_tag(name:"solution", value:"Update to version 7.14.0 or later.");

  script_xref(name:"URL", value:"https://discuss.elastic.co/t/elastic-stack-7-14-0-security-update/280344");

  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_in_range(version: version, test_version: "7.11.0", test_version2: "7.13.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.14.0", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);