Drupal Core Access Bypass Vulnerability (SA-CORE-2017-002)

# SPDX-FileCopyrightText: 2017 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:drupal:drupal";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.810759");
  script_version("2023-07-14T16:09:27+0000");
  script_cve_id("CVE-2017-6919");
  script_tag(name:"cvss_base", value:"6.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-04-20 12:14:26 +0530 (Thu, 20 Apr 2017)");
  # A site is only affected by this if some of the conditions are met.
  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_name("Drupal Core Access Bypass Vulnerability (SA-CORE-2017-002)");

  script_tag(name:"summary", value:"Drupal is prone to an access bypass vulnerability.");

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

  script_tag(name:"insight", value:"Drupal has released an advisory to address
  access bypass vulnerability in Drupal core.

  A site is only affected by this if all of the following conditions are met:

  The site has the RESTful Web Services (rest) module enabled.
  The site allows PATCH requests.
  An attacker can get or register a user account on the site.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to obtain sensitive information.");

  script_tag(name:"affected", value:"Drupal version 8 prior to 8.2.8 and 8.3.1");

  script_tag(name:"solution", value:"Upgrade to version 8.2.8, 8.3.1 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"https://www.drupal.org/SA-CORE-2017-002");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_drupal_http_detect.nasl");
  script_mandatory_keys("drupal/detected");

  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, version_regex:"^[0-9]\.[0-9]+"))
  exit(0);

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

if(version =~ "^8\.") {
  if(version_in_range(version:version, test_version:"8.0", test_version2:"8.2.7")) {
    VULN = TRUE;
    fix = "8.2.8";
  }
}
else if(version_is_equal(version:version, test_version:"8.3.0")) {
  VULN = TRUE;
  fix = "8.3.1";
}

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

exit(99);