Apache Tika Server XML Entity Expansion Denial of Service Vulnerability

2018-09-27T00:00:00
ID OPENVAS:1361412562310814054
Type openvas
Reporter Copyright (C) 2018 Greenbone Networks GmbH
Modified 2019-05-17T00:00:00

Description

The host is installed with Apache Tika Server and is prone to denial of service vulnerability.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
#
# Apache Tika Server XML Entity Expansion Denial of Service Vulnerability
#
# Authors:
# Rinu Kuriakose <krinu@secpod.com>
#
# Copyright:
# Copyright (C) 2018 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
# 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:tika";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.814054");
  script_version("2019-05-17T10:45:27+0000");
  script_cve_id("CVE-2018-11761", "CVE-2018-11796");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"last_modification", value:"2019-05-17 10:45:27 +0000 (Fri, 17 May 2019)");
  script_tag(name:"creation_date", value:"2018-09-27 15:38:59 +0530 (Thu, 27 Sep 2018)");
  script_name("Apache Tika Server XML Entity Expansion Denial of Service Vulnerability");

  script_tag(name:"summary", value:"The host is installed with Apache Tika Server
  and is prone to denial of service vulnerability.");

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

  script_tag(name:"insight", value:"The flaw exists because apache tika's
  XML parsers were not configured to limit entity expansion.

  NOTE: In Apache Tika 1.19 (CVE-2018-11761), added an entity expansion
  limit for XML parsing. However, Tika reuses SAXParsers and calls reset()
  after each parse, which, for Xerces2 parsers, as per the documentation,
  removes the user-specified SecurityManager and thus removes entity
  expansion limits after the first parse. Apache Tika 1.19 is therefore
  still vulnerable to entity expansions.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to cause a denial of service condition.");

  script_tag(name:"affected", value:"Apache Tika Server from versions 0.1 to 1.19");

  script_tag(name:"solution", value:"Upgrade to Apache Tika Server 1.19.1 or later. Please see the references for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner");
  script_xref(name:"URL", value:"https://lists.apache.org/thread.html/5553e10bba5604117967466618f219c0cae710075819c70cfb3fb421@%3Cdev.tika.apache.org%3E");
  script_xref(name:"URL", value:"https://lists.apache.org/thread.html/5553e10bba5604117967466618f219c0cae710075819c70cfb3fb421@%3Cdev.tika.apache.org%3E");
  script_xref(name:"URL", value:"https://tika.apache.org");
  script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_dependencies("gb_apache_tika_server_detect.nasl");
  script_mandatory_keys("Apache/Tika/Server/Installed");
  script_require_ports("Services/www", 9998, 80);
  exit(0);
}

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

if(!tPort = get_app_port(cpe:CPE)){
  exit(0);
}

if(!infos = get_app_version_and_location(cpe:CPE, port:tPort, exit_no_version:TRUE)) exit(0);
tVer = infos['version'];
tPath = infos['location'];

if(version_in_range(version:tVer, test_version: "0.1", test_version2: "1.19"))
{
  report = report_fixed_ver(installed_version:tVer, fixed_version:"1.19.1", install_path:tPath);
  security_message(data:report, port:tPort);
  exit(0);
}
exit(99);