ntop HTTP Basic Authentication NULL Pointer Dereference Denial Of Service Vulnerability

# SPDX-FileCopyrightText: 2009 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:ntop:ntop";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.100255");
  script_version("2024-03-04T14:37:58+0000");
  script_tag(name:"last_modification", value:"2024-03-04 14:37:58 +0000 (Mon, 04 Mar 2024)");
  script_tag(name:"creation_date", value:"2009-08-23 12:14:46 +0200 (Sun, 23 Aug 2009)");
  script_cve_id("CVE-2009-2732");
  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_name("ntop HTTP Basic Authentication NULL Pointer Dereference Denial Of Service Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_dependencies("ntop_detect.nasl");
  script_mandatory_keys("ntop/installed");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/36074");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/505876");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/505862");

  script_tag(name:"summary", value:"The 'ntop' tool is prone to a denial of service (DoS)
  vulnerability because of a NULL-pointer dereference that occurs when crafted HTTP Basic
  Authentication credentials are received by the embedded webserver.");

  script_tag(name:"impact", value:"An attacker can exploit this issue to crash the affected application,
  denying service to legitimate users.");

  script_tag(name:"affected", value:"This issue affects ntop 3.3.10, other versions may also be affected.");

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

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

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the
  disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade
  to a newer release, disable respective features, remove the product or replace the product by another one.");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if( ! port = get_app_port( cpe:CPE ) )
  exit( 0 );

if( ! version = get_app_version( cpe:CPE, port:port ) )
  exit( 0 );

if( version_is_equal( version:version, test_version:"3.3.10" ) ) {
  report = report_fixed_ver(installed_version: version, fixed_version: "See advisory");
  security_message(port: port, data: report);
  exit( 0 );
}

exit( 99 );