Nextcloud Server Multiple Vulnerabilities (Jul 2021)

# 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:nextcloud:nextcloud_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.146310");
  script_version("2023-10-20T16:09:12+0000");
  script_tag(name:"last_modification", value:"2023-10-20 16:09:12 +0000 (Fri, 20 Oct 2023)");
  script_tag(name:"creation_date", value:"2021-07-16 06:23:52 +0000 (Fri, 16 Jul 2021)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-14 15:52:00 +0000 (Wed, 14 Jul 2021)");

  script_cve_id("CVE-2021-32678", "CVE-2021-32679", "CVE-2021-32680", "CVE-2021-32688", "CVE-2021-32703",
                "CVE-2021-32705", "CVE-2021-32725", "CVE-2021-32726", "CVE-2021-32733", "CVE-2021-32734",
                "CVE-2021-32741");

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

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

  script_name("Nextcloud Server Multiple Vulnerabilities (Jul 2021)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_nextcloud_detect.nasl");
  script_mandatory_keys("nextcloud/installed");

  script_tag(name:"summary", value:"Nextcloud Server is prone to multiple vulnerabilities.");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - CVE-2021-32678: Ratelimit not applied on OCS API responses

  - CVE-2021-32679: Filenames not escaped by default in controllers using DownloadResponse

  - CVE-2021-32680: Audit log is not properly logging unsetting of share expiration date

  - CVE-2021-32688: Application specific tokens can change their own scope

  - CVE-2021-32703: Lack of ratelimit on shareinfo endpoint

  - CVE-2021-32705: Lack of ratelimit on public DAV endpoint

  - CVE-2021-32725: Default share permissions not respected for federated reshares

  - CVE-2021-32726: Webauthn tokens not removed after user has been deleted

  - CVE-2021-32733: XSS in Nextcloud Text application

  - CVE-2021-32734: File path disclosure of shared files in Nextcloud Text application

  - CVE-2021-32741: Lack of ratelimit on public share link mount endpoint");

  script_tag(name:"affected", value:"Nextcloud server 19.0.12 and prior, 20.0.x through 20.0.10 and
  21.0.x through 21.0.2.");

  script_tag(name:"solution", value:"Update to version 19.0.13, 20.0.11, 21.0.3 or later.");

  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48rx-3gmf-g74j");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fxpq-wq7c-vppf");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-48m7-7r2r-838r");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9p");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fjv7-283f-5m54");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6f6v-h9x9-jj4v");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6qr9-c846-j8mg");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x4w3-jhcr-57pq");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6hf5-c2c4-2526");
  script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-crvj-vmf7-xrvr");

  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: "19.0.13")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "19.0.13", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "20.0.0", test_version2: "20.0.10")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "20.0.11", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "21.0.0", test_version2: "21.0.2")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "21.0.3", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);