PHP 5.5.x < 5.5.22 Multiple Vulnerabilities (GHOST)

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

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

if (description)
{
  script_id(81511);
  script_version("1.23");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id(
    "CVE-2014-9705",
    "CVE-2015-0235",
    "CVE-2015-0273",
    "CVE-2015-2301",
    "CVE-2015-8866"
  );
  script_bugtraq_id(
    72325,
    72701,
    73031,
    73034,
    73037
  );
  script_xref(name:"CERT", value:"967332");

  script_name(english:"PHP 5.5.x < 5.5.22 Multiple Vulnerabilities (GHOST)");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server uses a version of PHP that is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of PHP 5.5.x installed on the
remote host is prior to 5.5.22. It is, therefore, affected by multiple
vulnerabilities :

  - A heap-based buffer overflow flaw in the
    enchant_broker_request_dict function in
    ext/enchant/enchant.c could allow a remote attacker
    to cause a buffer overflow, resulting in
    a denial of service condition or the execution of
    arbitrary code. (CVE-2014-9705)

  - A heap-based buffer overflow flaw in the GNU C Library
    (glibc) due to improperly validating user-supplied input
    in the glibc functions __nss_hostname_digits_dots(),
    gethostbyname(), and gethostbyname2(). This allows a
    remote attacker to cause a buffer overflow, resulting in
    a denial of service condition or the execution of
    arbitrary code. (CVE-2015-0235)

  - A use-after-free flaw exists in the function
    php_date_timezone_initialize_from_hash() within the
    'ext/date/php_date.c' script. An attacker can exploit
    this to access sensitive information or crash
    applications linked to PHP. (CVE-2015-0273)

  - A use-after-free vulnerability in the
    phar_rename_archive function in phar_object.c could
    allow a remote attacker to cause a denial of service.
    (CVE-2015-2301)

  - An XML External Entity (XXE) flaw exists in the PHP-FPM
    component due to improper parsing of XML data. A remote
    attacker can exploit this, via specially crafted XML
    data, to disclose sensitive information or cause a
    denial of service. (CVE-2015-8866)
    
Note that Nessus has not attempted to exploit 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#5.5.22");
  script_set_attribute(attribute:"see_also", value:"https://bugs.php.net/bug.php?id=68925");
  script_set_attribute(attribute:"see_also", value:"https://bugs.php.net/bug.php?id=68942");
  # https://www.qualys.com/research/security-advisories/GHOST-CVE-2015-0235.txt
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c7a6ddbd");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PHP version 5.5.22 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC: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_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-0235");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Exim GHOST (glibc gethostbyname) Buffer Overflow');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/01/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/25");

  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) 2015-2022 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(\.5)?$") audit(AUDIT_VER_NOT_GRANULAR, "PHP", port, version);
if (version !~ "^5\.5\.") audit(AUDIT_NOT_DETECT, "PHP version 5.5.x", port);

if (version =~ "^5\.5\.([0-9]|1[0-9]|2[01])($|[^0-9])")
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Version source    : '+source +
      '\n  Installed version : '+version +
      '\n  Fixed version     : 5.5.22' +
      '\n';
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
  exit(0);
}
else audit(AUDIT_LISTEN_NOT_VULN, "PHP", port, version);