Asterisk DoS Vulnerability (AST-2018-007)

2018-06-13T00:00:00
ID OPENVAS:1361412562310141177
Type openvas
Reporter This script is Copyright (C) 2018 Greenbone Networks GmbH
Modified 2018-10-26T00:00:00

Description

Asterisk is prone to a denial of service vulnerability.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_asterisk_AST-2018-007.nasl 12120 2018-10-26 11:13:20Z mmartin $
#
# Asterisk DoS Vulnerability (AST-2018-007)
#
# Authors:
# Christian Kuersteiner <christian.kuersteiner@greenbone.net>
#
# Copyright:
# Copyright (c) 2018 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:/a:digium:asterisk';

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.141177");
  script_version("$Revision: 12120 $");
  script_tag(name:"last_modification", value:"$Date: 2018-10-26 13:13:20 +0200 (Fri, 26 Oct 2018) $");
  script_tag(name:"creation_date", value:"2018-06-13 10:10:33 +0700 (Wed, 13 Jun 2018)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:C");

  script_cve_id("CVE-2018-12228");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

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

  script_name("Asterisk DoS Vulnerability (AST-2018-007)");

  script_category(ACT_GATHER_INFO);

  script_copyright("This script is Copyright (C) 2018 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("secpod_asterisk_detect.nasl");
  script_mandatory_keys("Asterisk-PBX/Installed");

  script_tag(name:"summary", value:"Asterisk is prone to a 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:"When connected to Asterisk via TCP/TLS if the client abruptly disconnects,
or sends a specially crafted message then Asterisk gets caught in an infinite loop while trying to read the data
stream. Thus rendering the system as unusable.");

  script_tag(name:"affected", value:"Asterisk Open Source 15.x.");

  script_tag(name:"solution", value:"Upgrade to Version 15.4.1 or later.");

  script_xref(name:"URL", value:"http://downloads.asterisk.org/pub/security/AST-2018-007.html");
  script_xref(name:"URL", value:"https://issues.asterisk.org/jira/browse/ASTERISK-27807");

  exit(0);
}

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

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

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

if (version =~ "^15\.") {
  if (version_is_less(version: version, test_version: "15.4.1")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.4.1");
    security_message(port: port, data: report, proto: "udp");
    exit(0);
  }
}

exit(0);