Nginx 1.5.13 - 1.27.0 Buffer Overread Vulnerability

# SPDX-FileCopyrightText: 2024 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("1.3.6.1.4.1.25623.1.0.114764");
  script_version("2025-09-08T05:38:50+0000");
  script_tag(name:"last_modification", value:"2025-09-08 05:38:50 +0000 (Mon, 08 Sep 2025)");
  script_tag(name:"creation_date", value:"2024-08-15 14:11:02 +0000 (Thu, 15 Aug 2024)");
  script_tag(name:"cvss_base", value:"3.8");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:H/Au:S/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-09-05 15:42:32 +0000 (Fri, 05 Sep 2025)");

  script_cve_id("CVE-2024-7347");

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

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

  script_name("Nginx 1.5.13 - 1.27.0 Buffer Overread Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2024 Greenbone AG");
  script_family("Web Servers");
  script_dependencies("gb_nginx_consolidation.nasl");
  script_mandatory_keys("nginx/detected");

  script_tag(name:"summary", value:"Nginx is prone to a buffer overread in the
  ngx_http_mp4_module.");

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

  script_tag(name:"insight", value:"The product has a vulnerability in the ngx_http_mp4_module,
  which might allow an attacker to over-read worker memory resulting in its termination, using a
  specially crafted mp4 file. The issue only affects the product if it is built with the
  ngx_http_mp4_module and the mp4 directive is used in the configuration file. Additionally, the
  attack is possible only if an attacker can trigger the processing of a specially crafted mp4 file
  with the ngx_http_mp4_module.");

  script_tag(name:"impact", value:"Traffic is disrupted while the worker process restarts. This
  vulnerability allows a local, authenticated attacker to cause a denial-of-service (DoS).");

  script_tag(name:"affected", value:"Nginx versions 1.5.13 through 1.27.0.");

  script_tag(name:"solution", value:"Update to version 1.26.2, 1.27.1 or later.");

  script_xref(name:"URL", value:"https://mailman.nginx.org/pipermail/nginx-announce/2024/UUOCLLONPR6244YQYU65PO5LB7JDYCWM.html");
  script_xref(name:"URL", value:"https://nginx.org/en/security_advisories.html");
  script_xref(name:"URL", value:"https://my.f5.com/manage/s/article/K000140529");

  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_exclusive(version: version, test_version_lo: "1.5.13", test_version_up: "1.26.2")) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.26.2", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_is_equal(version: version, test_version: "1.27.0")) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.27.1", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);