PHP 'crypt()' Function Security Bypass Vulnerability

# Copyright (C) 2011 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:php:php";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.802329");
  script_version("2022-04-28T13:38:57+0000");
  script_tag(name:"last_modification", value:"2022-04-28 13:38:57 +0000 (Thu, 28 Apr 2022)");
  script_tag(name:"creation_date", value:"2011-09-07 08:36:57 +0200 (Wed, 07 Sep 2011)");
  script_cve_id("CVE-2011-3189");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_name("PHP 'crypt()' Function Security Bypass Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone Networks GmbH");
  script_family("Web application abuses");
  script_dependencies("secpod_php_smb_login_detect.nasl", "gb_php_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("php/detected", "Host/runs_windows");

  script_xref(name:"URL", value:"http://secunia.com/advisories/45678");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/48259");
  script_xref(name:"URL", value:"http://www.php.net/archive/2011.php#id2011-08-22-1");

  script_tag(name:"impact", value:"Successful exploitation could allow remote attackers to bypass authentication
  via an arbitrary password.");

  script_tag(name:"affected", value:"PHP version 5.3.7 on Windows");

  script_tag(name:"insight", value:"The flaw is due to an error in 'crypt()' function which returns the
  salt value instead of hash value when executed with MD5 hash, which allows
  attacker to bypass authentication via an arbitrary password.");

  script_tag(name:"solution", value:"Update to PHP version 5.3.8 or later.");

  script_tag(name:"summary", value:"PHP is prone to a security bypass vulnerability.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner");

  exit(0);
}

include("version_func.inc");
include("host_details.inc");

if(isnull(port = get_app_port(cpe:CPE)))
  exit(0);

if(!vers = get_app_version(cpe:CPE, port:port))
  exit(0);

##To check PHP version equal to 5.3.7
if(version_is_equal(version:vers, test_version:"5.3.7")){
  report = report_fixed_ver(installed_version:vers, fixed_version:"5.3.8");
  security_message(data:report, port:port);
  exit(0);
}

exit(99);