OpenSSL Overflow Vulnerability - DEC 2017 (Linux)

2017-12-08T00:00:00
ID OPENVAS:1361412562310107269
Type openvas
Reporter Copyright (C) 2017 Greenbone Networks GmbH
Modified 2019-02-27T00:00:00

Description

This host is running OpenSSL and is prone to an overflow bug.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_openssl_overflow_bug_lin.nasl 13898 2019-02-27 08:37:43Z cfischer $
#
# OpenSSL Overflow Vulnerability - DEC 2017 (Linux)
#
# Authors:
# Tameem Eissa <tameem.eissa@greenbone.net>
#
# Copyright:
# Copyright (C) 2017 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:openssl:openssl";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.107269");
  script_version("$Revision: 13898 $");
  script_tag(name:"last_modification", value:"$Date: 2019-02-27 09:37:43 +0100 (Wed, 27 Feb 2019) $");
  script_tag(name:"creation_date", value:"2017-12-08 12:22:37 +0100 (Fri, 08 Dec 2017)");
  script_cve_id("CVE-2017-3738");
  script_bugtraq_id(102118);

  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_name("OpenSSL Overflow Vulnerability - DEC 2017 (Linux)");

  script_tag(name:"summary", value:"This host is running OpenSSL and is prone
  to an overflow bug.");

  script_tag(name:"vuldetect", value:"Get the installed version and check if it is vulnerable.");

  script_tag(name:"insight", value:"The overflow bug is in the AVX2 Montgomery multiplication procedure
used in exponentiation with 1024-bit moduli.");

  script_tag(name:"impact", value:"Successfully exploiting this issue would allow an attacker to derive information about the private key.");

  script_tag(name:"affected", value:"OpenSSL 1.0.2 before 1.0.2n. OpenSSL 1.1.0 before 1.1.0h.

  NOTE: This issue only affects 64-bit installations.");

  script_tag(name:"solution", value:"OpenSSL 1.0.2 users should upgrade to 1.0.2n. OpenSSL 1.1.0 should upgrade to 1.1.0h
  when it is available, a fix is also available in commit e502cc86d in the OpenSSL git repository.");

  script_xref(name:"URL", value:"https://www.openssl.org/news/secadv/20171207.txt");
  script_tag(name:"solution_type", value:"VendorFix");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_openssl_detect.nasl", "gb_openssl_detect_lin.nasl", "os_detection.nasl");
  script_mandatory_keys("openssl/detected", "Host/runs_unixoide");

  exit(0);
}

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

if(isnull(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'];
path = infos['location'];

if (vers =~ "^1\.0\.2")
{
  if(version_is_less(version:vers, test_version:"1.0.2n"))
  {
    report =  report_fixed_ver(installed_version:vers, fixed_version:"1.0.2n", install_path:path);
    security_message(port:port, data:report);
    exit(0);
  }
}
else if (vers =~ "^1\.1\.0")
{
  if(version_is_less(version:vers, test_version:"1.1.0h"))
  {
    report =  report_fixed_ver(installed_version:vers, fixed_version:"1.1.0h", install_path:path);
    security_message(port:port, data:report);
    exit(0);
  }
}

exit(99);