nginx 1.1.3 - 1.15.5 Denial of Service and Memory Disclosure via mp4 module

# SPDX-FileCopyrightText: 2018 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.112420");
  script_version("2023-07-20T05:05:18+0000");
  script_cve_id("CVE-2018-16845");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:P");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:18 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-11-16 20:26:00 +0000 (Mon, 16 Nov 2020)");
  script_tag(name:"creation_date", value:"2018-11-12 12:06:11 +0100 (Mon, 12 Nov 2018)");

  script_name("nginx 1.1.3 - 1.15.5 Denial of Service and Memory Disclosure via mp4 module");

  script_tag(name:"summary", value:"A security issue was identified in the ngx_http_mp4_module, which might
  allow an attacker to cause infinite loop in a worker process, cause a worker process crash, or might result
  in worker process memory disclosure by using a specially crafted mp4 file.");

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

  script_tag(name:"insight", value:"The issue only affects nginx if it is built with the ngx_http_mp4_module
  (the module is not built by default) and the 'mp4' directive is used in the configuration file. Further,
  the attack is only possible if an attacker is able to trigger processing of a specially crafted mp4 file
  with the ngx_http_mp4_module.");

  script_tag(name:"affected", value:"nginx versions 1.1.3 through 1.15.5.");

  script_tag(name:"solution", value:"Update nginx to version 1.15.6 or later.");

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

  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_xref(name:"URL", value:"http://mailman.nginx.org/pipermail/nginx-announce/2018/000221.html");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/105868");

  script_category(ACT_GATHER_INFO);
  script_family("Web Servers");
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_dependencies("gb_nginx_consolidation.nasl");
  script_mandatory_keys("nginx/detected");

  exit(0);
}

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

include("version_func.inc");
include("host_details.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: "1.1.3", test_version2: "1.15.5" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.15.6", install_path: location );
  security_message( port: port, data: report );
  exit( 0 );
}

exit( 99 );