TYPO3 XSS Vulnerability (TYPO3-CORE-SA-2021-013)

# 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("1.3.6.1.4.1.25623.1.0.146489");
  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:"2021-08-11 04:05:03 +0000 (Wed, 11 Aug 2021)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-08-19 15:51:00 +0000 (Thu, 19 Aug 2021)");

  script_cve_id("CVE-2021-32768");

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

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

  script_name("TYPO3 XSS Vulnerability (TYPO3-CORE-SA-2021-013)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_typo3_http_detect.nasl");
  script_mandatory_keys("typo3/detected");

  script_tag(name:"summary", value:"TYPO3 is prone to a cross-site scripting (XSS) vulnerability.");

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

  script_tag(name:"insight", value:"Failing to properly parse, sanitize and encode malicious
  rich-text content, the content rendering process in the website frontend is vulnerable to
  cross-site scripting. Corresponding rendering instructions via TypoScript functionality
  HTMLparser do not consider all potentially malicious HTML tag & attribute combinations per
  default.

  In addition, the lack of comprehensive default node configuration for rich-text fields in the
  backend user interface fosters this malfunction.

  In default scenarios, a valid backend user account is needed to exploit this vulnerability. In
  case custom plugins used in the website frontend accept and reflect rich-text content submitted
  by users, no authentication is required.");

  script_tag(name:"affected", value:"TYPO3 version 7.0.0 through 7.6.52 ELTS, 8.0.0 through
  8.7.41 ELTS, 9.0.0 through 9.5.28, 10.0.0 through 10.4.18 and 11.0.0 through 11.3.1.");

  script_tag(name:"solution", value:"Update to version 7.6.53 ELTS, 8.7.42 ELTS, 9.5.29, 10.4.19,
  11.3.2 or later.");

  script_xref(name:"URL", value:"https://typo3.org/security/advisory/typo3-core-sa-2021-013");

  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: "7.0.0", test_version2: "7.6.52")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.6.53 ELTS", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "8.0.0", test_version2: "8.7.41")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "8.7.42 ELTS", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "9.0.0", test_version2: "9.5.28")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.5.29", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "10.0.0", test_version2: "10.4.18")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "10.4.19", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "11.0.0", test_version2: "11.3.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "11.3.2", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);