Elastic Elasticsearch Multiple Vulnerabilities (ESA-2021-06, ESA-2021-08)

# 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("1.3.6.1.4.1.25623.1.0.145940");
  script_version("2021-08-17T12:00:57+0000");
  script_tag(name:"last_modification", value:"2021-08-17 12:00:57 +0000 (Tue, 17 Aug 2021)");
  script_tag(name:"creation_date", value:"2021-05-14 04:26:15 +0000 (Fri, 14 May 2021)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-06-25 06:15:00 +0000 (Fri, 25 Jun 2021)");

  script_cve_id("CVE-2021-22135", "CVE-2021-22137");

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

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

  script_name("Elastic Elasticsearch Multiple Vulnerabilities (ESA-2021-06, ESA-2021-08)");

  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 multiple vulnerabilities.");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - CVE-2021-22135: Suggester & Profile API information disclosure flaw

  - CVE-2021-22137: Field disclosure flaw");

  script_tag(name:"impact", value:"This could lead to disclosing the existence of documents and
  fields the attacker should not be able to view or result in an attacker gaining additional insight
  into potentially sensitive indices.");

  script_tag(name:"affected", value:"Elasticsearch versions prior to versions 6.8.15 or 7.12.0.");

  script_tag(name:"solution", value:"Update to version 6.8.15, 7.12.0 or later.");

  script_xref(name:"URL", value:"https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125");

  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_less(version: version, test_version: "6.8.15")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.8.15", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version =~ "7\." && version_is_less(version: version, test_version: "7.12.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.12.0", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);