MatrixSSL < 3.8.7 Cryptographic Vulnerability

# Copyright (C) 2017 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# 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:matrixssl:matrixssl";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106517");
  script_version("2023-01-18T10:11:02+0000");
  script_tag(name:"last_modification", value:"2023-01-18 10:11:02 +0000 (Wed, 18 Jan 2023)");
  script_tag(name:"creation_date", value:"2017-01-16 14:12:24 +0700 (Mon, 16 Jan 2017)");
  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:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-01-19 02:59:00 +0000 (Thu, 19 Jan 2017)");

  script_cve_id("CVE-2016-8671");

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

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

  script_name("MatrixSSL < 3.8.7 Cryptographic Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_matrixssl_http_detect.nasl");
  script_mandatory_keys("matrixssl/detected");

  script_tag(name:"summary", value:"MatrixSSL is prone to a vulnerability in the modular
  exponentiation function.");

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

  script_tag(name:"insight", value:"The pstm_exptmod function in MatrixSSL does not properly perform
  modular expontiation, which might allow remote attackers to predict the secret key via unspecified
  vectors. This vulnerability exists because of an incomplete fix for CVE-2016-6887.");

  script_tag(name:"affected", value:"MatrixSSL versions 3.8.6 and prior.");

  script_tag(name:"solution", value:"Update to version 3.8.7 or later.");

  script_xref(name:"URL", value:"https://blog.fuzzing-project.org/54-Update-on-MatrixSSL-miscalculation-CVE-2016-8671,-incomplete-fix-for-CVE-2016-6887.html");
  script_xref(name:"URL", value:"https://github.com/matrixssl/matrixssl/blob/master/CHANGES.md");

  exit(0);
}

include("host_details.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_is_less(version: version, test_version: "3.8.7")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "3.8.7");
  security_message(port: port, data: report);
  exit(0);
}

exit(99);