Junos TCP Reassembly DoS Vulnerability

2015-11-24T00:00:00
ID OPENVAS:1361412562310106047
Type openvas
Reporter This script is Copyright (C) 2015 Greenbone Networks GmbH
Modified 2017-06-15T00:00:00

Description

Junos OS is prone to a TCP reassembly DoS vulnerability.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_junos_cve-2014-6449.nasl 6345 2017-06-15 10:00:59Z teissa $
#
# Junos TCP Reassembly DoS Vulnerability
#
# Authors:
# Christian Kuersteiner <christian.kuersteiner@greenbone.net>
#
# Copyright:
# Copyright (c) 2015 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:/o:juniper:junos';

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106047");
  script_version ("$Revision: 6345 $");
  script_tag(name:"last_modification", value:"$Date: 2017-06-15 12:00:59 +0200 (Thu, 15 Jun 2017) $");
  script_tag(name:"creation_date", value:"2015-11-24 11:15:58 +0700 (Tue, 24 Nov 2015)");
  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:"qod_type", value:"package");

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

  script_cve_id("CVE-2014-6449");

  script_name("Junos TCP Reassembly DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_family("JunOS Local Security Checks");
  script_copyright("This script is Copyright (C) 2015 Greenbone Networks GmbH");
  script_dependencies("gb_ssh_junos_get_version.nasl","gb_junos_snmp_version.nasl");
  script_mandatory_keys("Junos/Version");

  script_tag(name: "summary", value: "Junos OS is prone to a TCP reassembly DoS vulnerability.");

  script_tag(name: "vuldetect" , value: "Check the OS build.");

  script_tag(name: "insight", value :"Receipt of a very specific sequence of fragmented crafted packets
destined to the device can lead to consumption of all available buffers and causes a denial of service.
Transit traffic cannot trigger this issue, nor is transit traffic affected by the denial of service.");

  script_tag(name: "impact", value: "An unauthenticated remote attacker may cause a denial of service.");

  script_tag(name: "affected", value: "Junos OS 12.1, 12.3, 13.2, 13.3 and 14.1");

  script_tag(name: "solution" , value: "New builds of Junos OS software are available from Juniper.");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10696");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");

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

if (version =~ "^12") {
  if ((revcomp(a: version, b: "12.1X44-D55") < 0) &&
      (revcomp(a: version, b: "12.1X44") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.1X46-D35") < 0) &&
           (revcomp(a: version, b: "12.1X46") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.1X47-D25") < 0) &&
           (revcomp(a: version, b: "12.1X47") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.3R10") < 0) &&
           (revcomp(a: version, b: "12.3") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.3X48-D15") < 0) &&
           (revcomp(a: version, b: "12.3X48") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

if (version =~ "^13") {
  if (revcomp(a: version, b: "13.2R8") < 0) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "13.3R7") < 0) &&
           (revcomp(a: version, b: "13.3") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R5") < 0) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

exit(99);