Drupal Password Hashing Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2014 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("1.3.6.1.4.1.25623.1.0.105934");
  script_version("2023-07-27T05:05:08+0000");
  script_tag(name:"last_modification", value:"2023-07-27 05:05:08 +0000 (Thu, 27 Jul 2023)");
  script_tag(name:"creation_date", value:"2014-12-09 16:56:24 +0700 (Tue, 09 Dec 2014)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_cve_id("CVE-2014-9016");

  script_name("Drupal Password Hashing Denial of Service Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_family("Web application abuses");

  script_dependencies("gb_drupal_http_detect.nasl");
  script_mandatory_keys("drupal/detected");

  script_tag(name:"summary", value:"A vulnerability in the password hashing API of Drupal 7 can lead
  to a DoS.");

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

  script_tag(name:"insight", value:"Drupal 7 includes a password hashing API to ensure that user
  supplied passwords are not stored in plain text. An attacker can send specially crafted requests
  resulting in CPU and memory exhaustion.");

  script_tag(name:"impact", value:"An unauthenticated attacker can cause a denial of service.");

  script_tag(name:"affected", value:"Drupal 7 before 7.34.");

  script_tag(name:"solution", value:"Upgrade to Drupal 7.34 or later.");

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

  script_xref(name:"URL", value:"https://www.drupal.org/SA-CORE-2014-006");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/71202");
  script_xref(name:"URL", value:"http://www.behindthefirewalls.com/2014/12/cve-2014-9016-and-cve-2014-9034-PoC.html");

  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 =~ "^7\.") {
  if(version_is_less(version:version, test_version:"7.34")) {
    report = report_fixed_ver(installed_version:version, fixed_version:"7.34", install_path:location);
    security_message(port:port, data:report);
    exit(0);
  }
}

exit(99);