Elastic Elasticsearch Privilege Escalation Vulnerability (ESA-2020-07)

# SPDX-FileCopyrightText: 2021 Greenbone AG
# 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-only

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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117180");
  script_version("2025-09-03T08:26:15+0000");
  script_tag(name:"last_modification", value:"2025-09-03 08:26:15 +0000 (Wed, 03 Sep 2025)");
  script_tag(name:"creation_date", value:"2021-01-25 13:07:06 +0000 (Mon, 25 Jan 2021)");
  script_tag(name:"cvss_base", value:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-06-19 11:15:00 +0000 (Fri, 19 Jun 2020)");

  script_cve_id("CVE-2020-7014");

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

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

  script_name("Elastic Elasticsearch Privilege Escalation Vulnerability (ESA-2020-07)");

  script_category(ACT_GATHER_INFO);

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

  script_tag(name:"summary", value:"Elasticsearch is prone to a privilege escalation vulnerability.");

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

  script_tag(name:"insight", value:"The fix for ESA-2020-02 (CVE-2020-7009) was found to be incomplete.

  Elasticsearch contains a privilege escalation flaw if an attacker is able to create API keys and also
  authentication tokens.");

  script_tag(name:"impact", value:"An attacker who is able to generate an API key and an authentication token
  can perform a series of steps that result in an authentication token being generated with elevated privileges.");

  script_tag(name:"affected", value:"Elasticsearch Security versions from 6.7.0 to 6.8.8 and 7.0.0 to 7.6.2.");

  script_tag(name:"solution", value:"Update to version 6.8.9, 7.7.0 or later.");

  script_xref(name:"URL", value:"https://discuss.elastic.co/t/elastic-stack-6-8-9-and-7-7-0-security-update/235571");
  script_xref(name:"URL", value:"https://www.elastic.co/community/security");

  exit(0);
}

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

if (isnull(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: "6.7.0", test_version2: "6.8.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.8.9", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.0.0", test_version2: "7.6.2")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.7.0", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);