Apache HTTP Server Connection Blocking Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2004 Scott Shebby
# 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("1.3.6.1.4.1.25623.1.0.12280");
  script_version("2024-02-16T05:06:55+0000");
  script_tag(name:"last_modification", value:"2024-02-16 05:06:55 +0000 (Fri, 16 Feb 2024)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/9921");
  script_cve_id("CVE-2004-0174");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-02-15 20:37:56 +0000 (Thu, 15 Feb 2024)");
  script_name("Apache HTTP Server Connection Blocking Denial of Service Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2004 Scott Shebby");
  script_family("Denial of Service");
  script_dependencies("gb_apache_http_server_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("apache/http_server/detected", "Host/runs_unixoide");

  script_tag(name:"solution", value:"Update to Apache HTTP Server 2.0.49 or 1.3.31.");

  script_tag(name:"summary", value:"The remote web server appears to be running a version of
  Apache HTTP Server that is less that 2.0.49 or 1.3.31.

  These versions are vulnerable to a denial of service attack where a remote
  attacker can block new connections to the server by connecting to a listening
  socket on a rarely accessed port.");

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

  exit(0);
}

CPE = "cpe:/a:apache:http_server";

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

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

if( ! infos = get_app_version_and_location( cpe: CPE, port: port, exit_no_version: TRUE, version_regex: "^[0-9]+\.[0-9]+\.[0-9]+" ) )
  exit( 0 );

version = infos["version"];
location = infos["location"];

if( version_is_less( version: version, test_version: "1.3.31" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.3.31", install_path: location );
  security_message( data: report, port: port );
  exit( 0 );
}

if( version_in_range( version: version, test_version: "2.0.0", test_version2: "2.0.48" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "2.0.49", install_path: location );
  exit( 0 );
}

exit( 99 );