Nextcloud Server < 23.0.12, 24.x < 24.0.8, 25.x < 25.0.2 Path Traversal Vulnerability (GHSA-273v-9h7x-p68v)

# SPDX-FileCopyrightText: 2023 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:nextcloud:nextcloud_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.126359");
  script_version("2023-10-13T05:06:10+0000");
  script_tag(name:"last_modification", value:"2023-10-13 05:06:10 +0000 (Fri, 13 Oct 2023)");
  script_tag(name:"creation_date", value:"2023-02-23 11:44:52 +0000 (Thu, 23 Feb 2023)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:C/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-03-03 15:09:00 +0000 (Fri, 03 Mar 2023)");

  script_cve_id("CVE-2023-25579");

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

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

  script_name("Nextcloud Server < 23.0.12, 24.x < 24.0.8, 25.x < 25.0.2 Path Traversal Vulnerability (GHSA-273v-9h7x-p68v)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("General");
  script_dependencies("gb_nextcloud_detect.nasl");
  script_mandatory_keys("nextcloud/installed");

  script_tag(name:"summary", value:"Nextcloud Server is prone to a path traversal vulnerability.");

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

  script_tag(name:"impact", value:"OC\Files\Node\Folder:getFullPath() is validating and normalizing
  the string in the wrong order. The function seems to be used in newFile() and newFolder() items,
  allowing to create paths outside of ones own space and overwriting data from other users.");

  script_tag(name:"affected", value:"Nextcloud Server versions prior to 23.0.12, version 24.x prior
  to 24.0.8 and version 25.x prior to 25.0.2.");

  script_tag(name:"solution", value:"Update to version 23.0.12, 24.0.8, 25.0.2 or later.");

  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-273v-9h7x-p68v");

  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_is_less(version: version, test_version: "23.0.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "23.0.12", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "24.0", test_version_up: "24.0.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "24.0.8", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "25.0", test_version_up: "25.0.2")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "25.0.2", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);