Elastic Kibana Code Execution Vulnerability (ESA-2021-21)

# 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:kibana";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117698");
  script_version("2025-09-03T14:11:39+0000");
  script_tag(name:"last_modification", value:"2025-09-03 14:11:39 +0000 (Wed, 03 Sep 2025)");
  script_tag(name:"creation_date", value:"2021-09-27 11:31:59 +0000 (Mon, 27 Sep 2021)");
  script_tag(name:"cvss_base", value:"8.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:M/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-12-01 18:53:00 +0000 (Fri, 01 Dec 2023)");

  script_cve_id("CVE-2021-22150");

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

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

  script_name("Elastic Kibana Code Execution Vulnerability (ESA-2021-21)");

  script_category(ACT_GATHER_INFO);

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

  script_tag(name:"summary", value:"Elastic Kibana is prone to a code execution 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 a user with fleet admin permissions could
  upload a malicious package. Due to using an older version of the js-yaml library, this package
  would be loaded in an insecure manner, allowing an attacker to execute commands on the kibana
  server.");

  script_tag(name:"affected", value:"Elastic Kibana versions 7.10.2 through 7.14.0.");

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

  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_in_range(version: version, test_version: "7.10.2", test_version2: "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);