Apache Struts ClassLoader Manipulation Vulnerabilities (S2-021) (Windows)

# Copyright (C) 2019 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) of their respective author(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:apache:struts";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108629");
  script_version("2019-08-29T07:36:00+0000");
  script_bugtraq_id(67064, 67081);
  script_cve_id("CVE-2014-0112", "CVE-2014-0113");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2019-08-29 07:36:00 +0000 (Thu, 29 Aug 2019)");
  script_tag(name:"creation_date", value:"2019-08-28 07:41:10 +0000 (Wed, 28 Aug 2019)");
  script_name("Apache Struts ClassLoader Manipulation Vulnerabilities (S2-021) (Windows)");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_dependencies("gb_apache_struts2_detection.nasl", "os_detection.nasl");
  script_mandatory_keys("ApacheStruts/installed", "Host/runs_windows");

  script_xref(name:"URL", value:"https://cwiki.apache.org/confluence/display/WW/S2-021");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/67064");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/67081");

  script_tag(name:"summary", value:"ClassLoader Manipulation allows remote attackers to execute
  arbitrary Java code.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"solution", value:"Upgrade to Struts 2.3.20 or later.");

  script_tag(name:"insight", value:"The excluded parameter pattern introduced in version 2.3.16.1 to block
  access to getClass() method wasn't sufficient. It is possible to omit that with specially crafted requests.
  Also CookieInterceptor is vulnerable for the same kind of attack when it was configured to accept all
  cookies (when '*' is used to configure cookiesName param).");

  script_tag(name:"affected", value:"Struts 2.0.0 - Struts 2.3.16.3.");

  script_tag(name:"impact", value:"A remote attacker can execute arbitrary Java code via crafted
  parameters.");

  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(!port = get_app_port(cpe:CPE))
  exit(0);

if(!infos = get_app_version_and_location(cpe:CPE, port:port, exit_no_version:TRUE))
  exit(0);

vers = infos["version"];
if(vers !~ "^2\.[0-3]\.")
  exit(99);

if(version_in_range(version:vers, test_version:"2.0.0", test_version2:"2.3.16.3")) {
  report = report_fixed_ver(installed_version:vers, fixed_version:"2.3.20", install_path:infos["location"]);
  security_message(data:report, port:port);
  exit(0);
}

exit(99);