Cisco Email Security Appliance MIME Header Processing Filter Bypass Vulnerability

2016-11-17T00:00:00
ID OPENVAS:1361412562310106392
Type openvas
Reporter This script is Copyright (C) 2016 Greenbone Networks GmbH
Modified 2019-10-09T00:00:00

Description

A vulnerability in the email filtering functionality of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to bypass Advanced Malware Protection (AMP) filters that are configured for an affected device.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
#
# Cisco Email Security Appliance MIME Header Processing Filter Bypass Vulnerability
#
# Authors:
# Christian Kuersteiner <christian.kuersteiner@greenbone.net>
#
# Copyright:
# Copyright (c) 2016 Greenbone Networks GmbH
#
# 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:/h:cisco:email_security_appliance";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106392");
  script_cve_id("CVE-2016-6462");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_version("2019-10-09T06:43:33+0000");

  script_name("Cisco Email Security Appliance MIME Header Processing Filter Bypass Vulnerability");

  script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161116-esa1");

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

  script_tag(name:"solution", value:"Update to 9.7.2-131, 10.0.0-203 or later.");

  script_tag(name:"summary", value:"A vulnerability in the email filtering functionality of Cisco AsyncOS
Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to bypass Advanced
Malware Protection (AMP) filters that are configured for an affected device.");

  script_tag(name:"insight", value:"The vulnerability is due to improper error handling when malformed
Multipurpose Internet Mail Extensions (MIME) headers are present in an email attachment that is sent through an
affected device. An attacker could exploit this vulnerability by sending an email message that has a crafted,
MIME-encoded file attachment through an affected device.");

  script_tag(name:"impact", value:"A successful exploit could allow the attacker to bypass AMP filter
configurations for the device.");

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

  script_tag(name:"last_modification", value:"2019-10-09 06:43:33 +0000 (Wed, 09 Oct 2019)");
  script_tag(name:"creation_date", value:"2016-11-17 11:10:15 +0700 (Thu, 17 Nov 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("This script is Copyright (C) 2016 Greenbone Networks GmbH");
  script_dependencies("gb_cisco_esa_version.nasl");
  script_mandatory_keys("cisco_esa/installed");
  exit(0);
}

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

if( ! version = get_app_version( cpe:CPE ) ) exit( 0 );

affected = make_list(
  '9.7.1-066',
  '10.0.0-125',
  '10.0.0-082' );

foreach af ( affected )
{
  if( version == af )
  {
    if (version =~ "^9")
      fix = "9.7.2-131";
    else
      fix = "10.0.0-203";

    report = report_fixed_ver(  installed_version:version, fixed_version: fix );
    security_message( port:0, data:report );
    exit( 0 );
  }
}

exit( 99 );