PHP Multiple DoS Vulnerabilities (Oct 2016) - Linux

# Copyright (C) 2016 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.809338");
  script_version("2022-04-13T13:17:10+0000");
  # nb: Both CVEs are not listed on the ChangeLog page but affects the very same versions
  # according to the NVD entries which both are also referencing #73003 and #73147.
  script_cve_id("CVE-2016-7568", "CVE-2016-9137");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2022-04-13 13:17:10 +0000 (Wed, 13 Apr 2022)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-03-07 20:00:00 +0000 (Thu, 07 Mar 2019)");
  script_tag(name:"creation_date", value:"2016-10-03 12:09:46 +0530 (Mon, 03 Oct 2016)");
  script_name("PHP Multiple DoS Vulnerabilities (Oct 2016) - Linux");
  script_copyright("Copyright (C) 2016 Greenbone Networks GmbH");
  script_category(ACT_GATHER_INFO);
  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_xref(name:"URL", value:"http://www.php.net/ChangeLog-5.php");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/93184");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/93577");
  script_xref(name:"URL", value:"http://www.php.net/ChangeLog-7.php");
  script_xref(name:"URL", value:"http://seclists.org/oss-sec/2016/q3/639");
  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=73003");
  script_xref(name:"URL", value:"https://bugs.php.net/bug.php?id=73147");

  script_tag(name:"summary", value:"PHP is prone to multiple denial of service (DoS)
  vulnerabilities.");

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

  script_tag(name:"insight", value:"- Fixed bug #73003 (Integer Overflow in gdImageWebpCtx of
  gd_webp.c).

  - Fixed bug #73147 (Use After Free in PHP7 unserialize()).");

  script_tag(name:"impact", value:"Successfully exploiting this issue allows a remote attacker to
  cause a DoS, or possibly have unspecified other impact.");

  script_tag(name:"affected", value:"PHP versions before 5.6.27 and 7.0.x through 7.0.11.");

  script_tag(name:"solution", value:"Update to version 5.6.27, 7.0.12 or later.");

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

  exit(0);
}

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);

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

if(version_is_less(version:vers, test_version:"5.6.27"))
  fix = "5.6.27";

else if(version_in_range(version:vers, test_version:"7.0", test_version2:"7.0.11"))
  fix = "7.0.12";

if(fix) {
  report = report_fixed_ver(installed_version:vers, fixed_version:fix, install_path:loc);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);