PHP 5.6.x < 5.6.22 Multiple Vulnerabilities

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

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

if (description)
{
  script_id(91442);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id(
    "CVE-2013-7456",
    "CVE-2016-5093",
    "CVE-2016-5094",
    "CVE-2016-5096"
  );

  script_name(english:"PHP 5.6.x < 5.6.22 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 5.6.x prior to 5.6.22. It is, therefore, affected by
multiple vulnerabilities :

  - An out-of-bounds read error exists in the
    _gdContributionsCalc() function within file
    ext/gd/libgd/gd_interpolation.c. An unauthenticated,
    remote attacker can exploit this to disclose sensitive
    information or crash the process linked against the
    library. (CVE-2013-7456)

  - An out-of-bounds read error exists in the
    get_icu_value_internal() function within file
    ext/intl/locale/locale_methods.c due to improper
    handling of user-supplied input. An unauthenticated,
    remote attacker can exploit this to disclose sensitive
    information or crash the process linked against the
    library. (CVE-2016-5093)

  - An integer overflow condition exists in the
    php_html_entities() and php_filter_full_special_chars()
    functions within file ext/standard/html.c due to
    improper validation of user-supplied input. An
    unauthenticated, remote attacker can exploit this to
    have an unspecified impact. (CVE-2016-5094)

  - An integer underflow condition exists in file
    ext/standard/file.c due to improper validation of
    user-supplied input. An unauthenticated, remote
    attacker can exploit this to cause a NULL write,
    resulting in crashing the process linked against the
    library. (CVE-2016-5096)

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"http://php.net/ChangeLog-5.php#5.6.22");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PHP version 5.6.22 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-5093");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/09/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/05/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/06/02");

  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) 2016-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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 =~ "^5(\.6)?$")
  audit(AUDIT_VER_NOT_GRANULAR, "PHP", port, version);
if (version !~ "^5\.6\.") audit(AUDIT_NOT_DETECT, "PHP version 5.6.x", port);

if (version =~ "^5\.6\." && ver_compare(ver:version, fix:"5.6.22", strict:FALSE) < 0){
  security_report_v4(
  port  : port,
  extra :
    '\n  Version source    : ' + source +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : 5.6.22' +
    '\n',
  severity:SECURITY_HOLE
  );
}
else audit(AUDIT_LISTEN_NOT_VULN, "PHP", port, version);