Nextcloud Server 27.x < 27.1.10, 28.x < 28.0.6, 29.x < 29.0.1 Incomplete Sanitization Vulnerability

# SPDX-FileCopyrightText: 2024 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:nextcloud:nextcloud_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.153500");
  script_version("2025-10-02T05:38:29+0000");
  script_tag(name:"last_modification", value:"2025-10-02 05:38:29 +0000 (Thu, 02 Oct 2025)");
  script_tag(name:"creation_date", value:"2024-11-21 15:15:05 +0000 (Thu, 21 Nov 2024)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-10-01 18:34:21 +0000 (Wed, 01 Oct 2025)");

  script_cve_id("CVE-2024-52515");

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

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

  script_name("Nextcloud Server 27.x < 27.1.10, 28.x < 28.0.6, 29.x < 29.0.1 Incomplete Sanitization Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_nextcloud_server_http_detect.nasl");
  script_mandatory_keys("nextcloud/server/detected");

  script_tag(name:"summary", value:"Nextcloud Server is prone to an incomplete sanitization
  vulnerability.");

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

  script_tag(name:"insight", value:"After an admin enables the default-disabled SVG preview
  provider, a malicious user could upload a manipulated SVG file referencing paths. If the file
  would exist the preview of the SVG would preview the other file instead.");

  script_tag(name:"affected", value:"Nextcloud Server version 27.x prior to 27.1.10, 28.x prior to
  28.0.6 and 29.x prior to 29.0.1.");

  script_tag(name:"solution", value:"Update to version 27.1.10, 28.0.6, 29.0.1 or later.");

  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-5m5g-hw8c-2236");

  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_exclusive(version: version, test_version_lo: "27.0.0", test_version_up: "27.1.10")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "27.1.10", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "28.0.0", test_version_up: "28.0.6")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "28.0.6", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "29.0.0", test_version_up: "29.0.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "29.0.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);