PHP 'CVE-2017-7189' Improper Input Validation Vulnerability - Linux

# SPDX-FileCopyrightText: 2020 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:php:php";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108874");
  script_version("2024-02-15T05:05:40+0000");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"creation_date", value:"2020-08-17 08:47:19 +0000 (Mon, 17 Aug 2020)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-07-17 16:39:00 +0000 (Wed, 17 Jul 2019)");

  script_cve_id("CVE-2017-7189");

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

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

  script_name("PHP 'CVE-2017-7189' Improper Input Validation Vulnerability - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_php_ssh_login_detect.nasl", "gb_php_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("php/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"PHP is improperly validating input from untrusted input.");

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

  script_tag(name:"insight", value:"main/streams/xp_socket.c in PHP misparses fsockopen calls, such as by
  interpreting fsockopen('127.0.0.1:80', 443) as if the address/port were 127.0.0.1:80:443, which is later
  truncated to 127.0.0.1:80. This behavior has a security risk if the explicitly provided port number
  (i.e., 443 in this example) is hardcoded into an application as a security policy, but the hostname
  argument (i.e., 127.0.0.1:80 in this example) is obtained from untrusted input.");

  script_tag(name:"affected", value:"All PHP versions since 4.3.0 up to the latest 7.x versions.

  Note: PHP versions 7.0.18 and 7.1.4 introduced a fix which was reverted again in version 7.0.19 / 7.1.5 respectively.");

  script_tag(name:"solution", value:"No solution was made available by the vendor. General solution options
  are to upgrade to a newer release, disable respective features, remove the product or replace the product
  by another one.

  Note: PHP versions 7.0.18 and 7.1.4 introduced a fix which was reverted again in version 7.0.19 / 7.1.5 respectively
  and the fix wasn't introduced again as of today (08-2020).");

  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=74192");
  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=74429");
  script_xref(name:"URL", value:"https://github.com/php/php-src/commit/bab0b99f376dac9170ac81382a5ed526938d595a");

  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_is_greater_equal(version: version, test_version: "4.3.0") && version =~ "^[457]\." && version !~ "^7\.(0\.18|1\.4)") {
  report = report_fixed_ver(installed_version: version, fixed_version: "None", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);