TYPO3 DoS Vulnerability (TYPO3-CORE-SA-2021-005)

# 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-or-later

CPE = "cpe:/a:typo3:typo3";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.145681");
  script_version("2023-04-05T10:19:45+0000");
  script_tag(name:"last_modification", value:"2023-04-05 10:19:45 +0000 (Wed, 05 Apr 2023)");
  script_tag(name:"creation_date", value:"2021-03-30 03:53:27 +0000 (Tue, 30 Mar 2021)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-03-26 17:54:00 +0000 (Fri, 26 Mar 2021)");

  script_cve_id("CVE-2021-21359");

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

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

  script_name("TYPO3 DoS Vulnerability (TYPO3-CORE-SA-2021-005)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_typo3_http_detect.nasl");
  script_mandatory_keys("typo3/detected");

  script_tag(name:"summary", value:"TYPO3 is prone to a denial of service (DoS) vulnerability.");

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

  script_tag(name:"insight", value:"Requesting invalid or non-existing resources via HTTP triggers the page
  error handler which again could retrieve content to be shown as an error message from another page. This
  leads to a scenario in which the application is calling itself recursively - amplifying the impact of the
  initial attack until the limits of the web server are exceeded.");

  script_tag(name:"affected", value:"TYPO3 version 9.0.0 through 9.5.24, 10.0.0 through 10.4.13 and 11.0.0
  through 11.1.0.");

  script_tag(name:"solution", value:"Update to version 9.5.25, 10.4.14, 11.1.1 or later.");

  script_xref(name:"URL", value:"https://typo3.org/security/advisory/typo3-core-sa-2021-005");

  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, version_regex: "[0-9]+\.[0-9]+\.[0-9]+")) # nb: Version might not be exact enough
  exit(0);

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

if (version_in_range(version: version, test_version: "9.0.0", test_version2: "9.5.24")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.5.25", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "10.0.0", test_version2: "10.4.13")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "10.4.14", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "11.0.0", test_version2: "11.1.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "11.1.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);