ownCloud 10.0.9 < 10.3.1 File Permission Vulnerability

# SPDX-FileCopyrightText: 2020 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:owncloud:owncloud";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.144859");
  script_version("2023-12-01T16:11:30+0000");
  script_tag(name:"last_modification", value:"2023-12-01 16:11:30 +0000 (Fri, 01 Dec 2023)");
  script_tag(name:"creation_date", value:"2020-10-29 04:35:42 +0000 (Thu, 29 Oct 2020)");
  script_tag(name:"cvss_base", value:"2.7");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:S/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:A/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:"2021-02-25 20:04:00 +0000 (Thu, 25 Feb 2021)");

  script_cve_id("CVE-2020-36252");

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

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

  script_name("ownCloud 10.0.9 < 10.3.1 File Permission Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_owncloud_http_detect.nasl");
  script_mandatory_keys("owncloud/detected");

  script_tag(name:"summary", value:"ownCloud is prone to a vulnerability where it is possible to access all file
  versions of a user.");

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

  script_tag(name:"insight", value:"An authenticated attacker can access all versions of all files (even unshared)
  as soon as the owner of said files has at least one outgoing share with the attacker.

  To attacker needs to guess a file-id which is numeric and sequential.");

  script_tag(name:"impact", value:"Successful exploitation allows an attacker, who has one outgoing share from a victim,
  to access any version of any file by sending a request for a predictable ID number.");

  script_tag(name:"affected", value:"ownCloud version 10.0.9 - 10.3.0.");

  script_tag(name:"solution", value:"Update to version 10.3.1 or later.");

  script_xref(name:"URL", value:"https://owncloud.com/security-advisories/access-to-all-file-versions/");

  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(version: version, test_version: "10.0.9", test_version2: "10.3.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "10.3.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);