PHP 7.2.x < 7.2.14 Multiple vulnerabilities.

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

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

if (description)
{
  script_id(121353);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_cve_id(
    "CVE-2016-10166",
    "CVE-2018-19935",
    "CVE-2019-6977",
    "CVE-2019-9020",
    "CVE-2019-9021",
    "CVE-2019-9022",
    "CVE-2019-9023",
    "CVE-2019-9024"
  );
  script_bugtraq_id(
    95869,
    106143,
    106731,
    107154,
    107156
  );

  script_name(english:"PHP 7.2.x < 7.2.14 Multiple vulnerabilities.");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote host 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 7.2.x prior to 7.2.14. It is, therefore, affected by
multiple vulnerabilities:

  - An integer underflow condition exists in _gdContributionsAlloc
  function in gd_interpolation.c. An unauthenticated, remote attacker
  can have unspecified impact via vectors related to decrementing
  the u variable. (CVE-2016-10166)

  - A denial of service (DoS) vulnerability exists in
  ext/imap/php_imap.c. An unauthenticated, remote attacker can
  exploit this issue, via an empty string in the message argument
  to the imap_mail function, to cause the application to stop
  responding. (CVE-2018-19935)

  - A heap-based buffer overflow exists in gdImageColorMatch in
  gd_color_match.c in the GD Graphics Library (aka LibGD) 2.2.5.
  An unauthenticated, remote attacker can exploit this via the
  triggering of imagecolormatch calls with crafted image data, to
  cause a denial of service condition or the execution of arbitrary
  code. (CVE-2019-6977)

  - A heap-based buffer over-read exists in the xmlrpc_decode function
  due to improper validation of input data. An unauthenticated, remote 
  attacker can exploit this, via a specially crafted request, to cause
  a heap out-of-bounds read or read-after-free condition, which could 
  result in a complete system compromise. (CVE-2019-9020)

  - A heap-based buffer over-read exists in the PHAR reading functions
  in the PHAR extension, due to improper implementation of memory
  operations. An unauthenticated, remote attacker can exploit this,
  via persuading a user to parse a specially crafted file name on the
  targeted system, to disclose sensitive information. (CVE-2019-9021)

  - An information disclosure vulnerability exists in the
  dns_get_record function due to improper parsing of DNS responses. An
  unauthenticated, remote attacker can exploit this, via a specially
  crafted DNS reply sent from a rogue DNS server to disclose
  potentially sensitive information. (CVE-2019-9022)

  - Multiple heap-based buffer over-read instances exist in mbstring
  regular expression functions due to improper implementation of
  memory operations. An unauthenticated, remote attacker can exploit
  this by sending a specially crafted regular expression that contains
  multibyte sequences, to cause a condition that could allow the
  attacker to completely compromise the target system. (CVE-2019-9023)

  - An out-of-bounds read error exists in the xmlrpc_decode function
  due to improper implementation of memory operations. An
  unauthenticated, remote attacker can exploit this, via a hostile
  XMLRPC server to cause PHP to read from memory outside of allocated
  areas. (CVE-2019-9024)");
  script_set_attribute(attribute:"see_also", value:"http://php.net/ChangeLog-7.php#7.2.14");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PHP version 7.2.14 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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-10166");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/24");

  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) 2019-2022 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');


fix = '7.2.14';
minver = '7.2.0alpha1';

regexes = make_array(
  -3, 'alpha(\\d+)',
  -2, 'beta(\\d+)',
  -1, 'RC(\\d+)'
);

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

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

ver = php["ver"];
source = php["src"];
backported = get_kb_item('www/php/' + port + '/' + ver + '/backported');

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

vulnerable = ver_compare(minver:minver, ver:ver, fix:fix, regexes:regexes);
if (isnull(vulnerable)) exit(1, 'The version of PHP ' + ver + ' is not within the checked ranges.');
if (vulnerable > -1) audit(AUDIT_LISTEN_NOT_VULN, 'PHP', port, ver);

report =
'\n  Version source    : ' + source +
'\n  Installed version : ' + ver +
'\n  Fixed version     : ' + fix +
'\n';
security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);