Django 5.0.x < 5.0.14, 5.1.x < 5.1.8 DoS Vulnerability - Windows

# SPDX-FileCopyrightText: 2025 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:djangoproject:django";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.154287");
  script_version("2025-10-06T05:38:41+0000");
  script_tag(name:"last_modification", value:"2025-10-06 05:38:41 +0000 (Mon, 06 Oct 2025)");
  script_tag(name:"creation_date", value:"2025-04-04 03:46:55 +0000 (Fri, 04 Apr 2025)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:"2025-10-03 15:34:09 +0000 (Fri, 03 Oct 2025)");

  script_cve_id("CVE-2025-27556");

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

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

  script_name("Django 5.0.x < 5.0.14, 5.1.x < 5.1.8 DoS Vulnerability - Windows");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2025 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_django_detect_win.nasl");
  script_mandatory_keys("django/windows/detected");

  script_tag(name:"summary", value:"Django 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:"Python's NFKC normalization is slow on Windows. As a
  consequence, django.contrib.auth.views.LoginView, django.contrib.auth.views.LogoutView, and
  django.views.i18n.set_language are subject to a potential denial of service attack via certain
  inputs with a very large number of unicode characters.");

  script_tag(name:"affected", value:"Django version 5.0.x prior to 5.0.14 and 5.1.x prior to 5.1.8
  on Windows.");

  script_tag(name:"solution", value:"Update to version 5.0.14, 5.1.8 or later.");

  script_xref(name:"URL", value:"https://www.djangoproject.com/weblog/2025/apr/02/security-releases/");

  exit(0);
}

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

if (!infos = get_app_version_and_location(cpe: CPE, exit_no_version: TRUE))
  exit(0);

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

if (version_in_range_exclusive(version: version, test_version_lo: "5.0", test_version_up: "5.0.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.14", install_path: location);
  security_message(port: 0, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "5.1", test_version_up: "5.1.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.1.8", install_path: location);
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);