nghttp2 < 1.7.0 DoS Vulnerability

# SPDX-FileCopyrightText: 2016 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:nghttp2:nghttp2";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106172");
  script_version("2023-10-27T16:11:32+0000");
  script_tag(name:"last_modification", value:"2023-10-27 16:11:32 +0000 (Fri, 27 Oct 2023)");
  script_tag(name:"creation_date", value:"2016-08-08 11:13:25 +0700 (Mon, 08 Aug 2016)");
  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:"qod_type", value:"remote_banner");

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

  script_name("nghttp2 < 1.7.0 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Web Servers");
  script_dependencies("gb_nghttp2_detect.nasl");
  script_mandatory_keys("nghttp2/detected");

  script_tag(name:"summary", value:"nghttp2 is prone to a denial of service (DoS) vulnerability.");

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

  script_tag(name:"insight", value:"nghttpd is prone to a remote DoS attack. A remote attacker could
  exploit this issue by sending a crafted request that will induce a dependency cycle, causing the
  server to enter an infinite loop.");

  script_tag(name:"impact", value:"A remote attacker may cause a DoS condition.");

  script_tag(name:"affected", value:"Version prior to 1.7.0.");

  script_tag(name:"solution", value:"Upgrade to Version 1.7.0 or later.");

  script_xref(name:"URL", value:"http://www.imperva.com/docs/Imperva_HII_HTTP2.pdf");

  exit(0);
}

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

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

if (!version = get_app_version(cpe: CPE, port: port))
  exit(0);

if (version_is_less(version: version, test_version: "1.7.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.7.0");
  security_message(port: port, data: report);
  exit(0);
}

exit(0);