PHP 5.4.x < 5.4.27 awk Magic Parsing BEGIN DoS

2014-04-04T00:00:00
ID PHP_5_4_27.NASL
Type nessus
Reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-02T00:00:00

Description

According to its banner, the version of PHP 5.4.x installed on the remote host is a version prior to 5.4.27. It is, therefore, potentially affected by a denial of service vulnerability.

A flaw exists in the awk script detector within magic/Magdir/commands where multiple wildcards with unlimited repetitions are used. This could allow a context dependent attacker to cause a denial of service with a specially crafted ASCII file.

Note that this plugin has not attempted to exploit this issue, but instead relied only on PHP

                                        
                                            #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(73338);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/26");

  script_cve_id("CVE-2013-7345");
  script_bugtraq_id(66406);

  script_name(english:"PHP 5.4.x < 5.4.27 awk Magic Parsing BEGIN DoS");
  script_summary(english:"Checks version of PHP");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server uses a version of PHP that is potentially
affected by a denial of service vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of PHP 5.4.x installed on the
remote host is a version prior to 5.4.27. It is, therefore,
potentially affected by a denial of service vulnerability.

A flaw exists in the awk script detector within magic/Magdir/commands
where multiple wildcards with unlimited repetitions are used. This
could allow a context dependent attacker to cause a denial of service
with a specially crafted ASCII file.

Note that this plugin has not attempted to exploit this issue, but
instead relied only on PHP's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"http://www.php.net/ChangeLog-5.php#5.4.27");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PHP version 5.4.27 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2013-7345");

  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:"2011/12/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/04/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/04");

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

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

  script_copyright(english:"This script is Copyright (C) 2014-2019 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(\.4)?$") audit(AUDIT_VER_NOT_GRANULAR, "PHP", port, version);
if (version !~ "^5\.4\.") audit(AUDIT_NOT_DETECT, "PHP version 5.4.x", port);

if (version =~ "^5\.4\.([0-9]|1[0-9]|2[0-6])($|[^0-9])")
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Version source    : '+source +
      '\n  Installed version : '+version+
      '\n  Fixed version     : 5.4.27\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
  exit(0);
}
else audit(AUDIT_LISTEN_NOT_VULN, "PHP", port, version);