nginx 1.9.5 - 1.17.2 HTTP/2 Multiple DoS Vulnerabilities

# SPDX-FileCopyrightText: 2019 Greenbone AG
# 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

CPE = "cpe:/a:nginx:nginx";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142802");
  script_version("2023-10-06T16:09:51+0000");
  script_tag(name:"last_modification", value:"2023-10-06 16:09:51 +0000 (Fri, 06 Oct 2023)");
  script_tag(name:"creation_date", value:"2019-08-27 04:48:10 +0000 (Tue, 27 Aug 2019)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:"2021-01-30 02:36:00 +0000 (Sat, 30 Jan 2021)");

  script_cve_id("CVE-2019-9511", "CVE-2019-9513", "CVE-2019-9516");

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

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

  script_name("nginx 1.9.5 - 1.17.2 HTTP/2 Multiple DoS Vulnerabilities");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_nginx_consolidation.nasl");
  script_mandatory_keys("nginx/detected");

  script_tag(name:"summary", value:"nginx is prone to multiple denial of service (DoS)
  vulnerabilities in the HTTP/2 implementation.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"Several security issues were identified in nginx HTTP/2
  implementation, which might cause excessive memory consumption and CPU usage (CVE-2019-9511,
  CVE-2019-9513, CVE-2019-9516).");

  script_tag(name:"affected", value:"nginx versions 1.9.5 through 1.17.2.");

  script_tag(name:"solution", value:"Update to version 1.16.1, 1.17.3 or later.");

  script_xref(name:"URL", value:"https://mailman.nginx.org/pipermail/nginx-announce/2019/000249.html");

  exit(0);
}

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 ) )
  exit( 0 );

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

if( version_in_range( version: version, test_version: "1.9.5", test_version2: "1.16.0" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.16.1", install_path: location );
  security_message( port: port, data: report );
  exit( 0 );
}

if( version_in_range( version: version, test_version: "1.17", test_version2: "1.17.2" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.17.3", install_path: location );
  security_message( port: port, data: report );
  exit( 0 );
}

exit( 99 );