PHP 7.0.x < 7.0.20 Multiple Vulnerabilities

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(100804);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/26");
  script_bugtraq_id(99003);

  script_name(english:"PHP 7.0.x < 7.0.20 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The version of PHP running on the remote web server is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of PHP running on the remote web
server is 7.0.x prior to 7.0.20. It is, therefore, affected by the
following vulnerabilities :

  - A flaw exists in _zend_hash_add_or_update_i within file
    main/php_ini.c when handling a malformed php.ini file.
    An attacker can exploit this to cause a segmentation
    fault, resulting in a denial of service condition or
    possibly the execution of arbitrary code. (bug #74600)

  - An illegal instruction error exists in the function
    ZEND_FETCH_CLASS_CONSTANT_SPEC_CONST_CONST_HANDLER()
    when processing specially crafted input. An attacker can
    exploit this to cause a denial of service condition or
    possibly the execution of arbitrary code. (bug #74546)");
  script_set_attribute(attribute:"see_also", value:"http://php.net/ChangeLog-7.php#7.0.20");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PHP version 7.0.20 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/15");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:php:php");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2017-2025 Tenable Network Security, Inc.");

  script_dependencies("php_version.nasl");
  script_require_keys("www/PHP");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");

port = get_http_port(default:80, php:TRUE);

php = get_php_from_kb(
  port : port,
  exit_on_fail : TRUE
);

version = php["ver"];
source = php["src"];

backported = get_kb_item('www/php/'+port+'/'+version+'/backported');

if (report_paranoia < 2 && backported)
  audit(AUDIT_BACKPORT_SERVICE, port, "PHP "+version+" install");

# Check that it is the correct version of PHP
if (version =~ "^7(\.0)?$") audit(AUDIT_VER_NOT_GRANULAR, "PHP", port, version);
if (version !~ "^7\.0\.") audit(AUDIT_NOT_DETECT, "PHP version 7.0.x", port);

fix = "7.0.20";
if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
{
  report =
    '\n  Version source    : ' + source +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix +
    '\n';
  security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
}
else audit(AUDIT_LISTEN_NOT_VULN, "PHP", port, version);