Apache mod_proxy content-length buffer overflow

# OpenVAS Vulnerability Test
# $Id: apache_mod_proxy_buff_overflow.nasl 8023 2017-12-07 08:36:26Z teissa $
# Description: Apache mod_proxy content-length buffer overflow
#
# Authors:
# David Maciejak <david dot maciejak at kyxar dot fr>
# based on work from (C) Tenable Network Security
#
# Copyright:
# Copyright (C) 2004 David Maciejak
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2,
# as published by the Free Software Foundation
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#

tag_summary = "The remote web server appears to be running a version of Apache that is older
than version 1.3.32.

This version is vulnerable to a heap based buffer overflow in proxy_util.c
for mod_proxy. This issue may lead remote attackers to cause a denial of 
service and possibly execute arbitrary code on the server.";

tag_solution = "Don't use mod_proxy or upgrade to a newer version.";

#  Ref: Georgi Guninski

if(description)
{
 script_id(15555);
 script_version("$Revision: 8023 $");
 script_tag(name:"last_modification", value:"$Date: 2017-12-07 09:36:26 +0100 (Thu, 07 Dec 2017) $");
 script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
 script_bugtraq_id(10508);
 script_cve_id("CVE-2004-0492");
 script_tag(name:"cvss_base", value:"10.0");
 script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");

 name = "Apache mod_proxy content-length buffer overflow";

 script_name(name);




 script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"remote_banner_unreliable");

 script_copyright("This script is Copyright (C) 2004 David Maciejak");
 family = "Buffer overflow";
 script_family(family);
 script_dependencies("http_version.nasl");
 script_require_keys("www/apache");
 script_require_ports("Services/www", 80);
 script_tag(name : "solution" , value : tag_solution);
 script_tag(name : "summary" , value : tag_summary);
 exit(0);
}

#
# The script code starts here
#
include("http_func.inc");

port = get_http_port(default:80);
if(!port)exit(0);
if(!get_port_state(port))exit(0);

banner = get_http_banner(port: port);
if(!banner)exit(0);

serv = strstr(banner, "Server");
if(ereg(pattern:"^Server:.*Apache(-AdvancedExtranetServer)?/(1\.(3\.(2[6-9]|3[01])))", string:serv))
 {
   security_message(port);
   exit(0);
 }