IBM HTTP Server mod_proxy Interim Responses DoS Vulnerability

# Copyright (C) 2008 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900222");
  script_version("2022-05-11T11:17:52+0000");
  script_tag(name:"last_modification", value:"2022-05-11 11:17:52 +0000 (Wed, 11 May 2022)");
  script_tag(name:"creation_date", value:"2008-09-25 09:10:39 +0200 (Thu, 25 Sep 2008)");
  script_cve_id("CVE-2008-2364");
  script_copyright("Copyright (C) 2008 Greenbone Networks GmbH");
  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_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"remote_banner");
  script_family("Denial of Service");
  script_name("IBM HTTP Server mod_proxy Interim Responses DoS Vulnerability");
  script_dependencies("gb_get_http_banner.nasl");
  script_require_ports("Services/www", 80, 8880, 8008);
  script_mandatory_keys("IBM_HTTP_Server/banner");

  script_xref(name:"URL", value:"http://secunia.com/Advisories/31904/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/29653");
  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/42987");
  script_xref(name:"URL", value:"http://www-01.ibm.com/support/docview.wss?rs=177&context=SSEQTJ&uid=swg21173021");
  script_xref(name:"URL", value:"http://www-01.ibm.com/support/docview.wss?uid=swg27008517");

  script_tag(name:"summary", value:"IBM HTTP Server is prone to a denial of service (DoS) vulnerability.");

  script_tag(name:"insight", value:"Issue is due to an error in the ap_proxy_http_process_response()
  function in mod_proxy_http.c in the mod_proxy module when processing large number of interim responses
  to the client, which could consume all available memory resources.");

  script_tag(name:"affected", value:"IBM HTTP Server versions prior to 6.1.0.19.");

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

  script_tag(name:"solution", value:"Update to Fix Pack 19.");

  script_tag(name:"impact", value:"A remote/local user can cause denial of service.");

  exit(0);
}

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

port = http_get_port(default:80);

ibmWebSer = http_get_remote_headers(port:port);
if(ibmWebSer && egrep(pattern:"Server: IBM_HTTP_Server.*", string:ibmWebSer)) {
  if(egrep(pattern:"IBM_HTTP_Server/([0-5]\..*|6\.[01])[^.0-9]", string:ibmWebSer)) {
    security_message(port);
    exit(0);
  }
}