MatrixSSL (GUARD TLS-TK) <= 3.9.5 Side-Channel Attack Vulnerability

# Copyright (C) 2018 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.

if( description )
{
  script_oid("1.3.6.1.4.1.25623.1.0.113210");
  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:"2018-06-19 13:07:40 +0200 (Tue, 19 Jun 2018)");
  script_tag(name:"cvss_base", value:"1.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-08-06 16:55:00 +0000 (Mon, 06 Aug 2018)");

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

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

  script_cve_id("CVE-2018-12439");

  script_name("MatrixSSL (GUARD TLS-TK) <= 3.9.5 Side-Channel Attack Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_matrixssl_http_detect.nasl");
  script_mandatory_keys("matrixssl/detected");

  script_tag(name:"summary", value:"GUARD TLS-TK (formerly MatrixSSL) is vulnerable to a
  Memory-Cache Side-Channel attack.");

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

  script_tag(name:"insight", value:"The flaw is located in the code that computes signature
  component 's'. In many libraries, the code that performs modular addition does not run in constant
  time, and so a side channel can recover information that can be used to calculate the private key.");

  script_tag(name:"impact", value:"A local attacker might use the vulnerability to acquire SSH keys
  or TLS private keys.");

  script_tag(name:"affected", value:"MatrixSSL through version 3.9.5.");

  script_tag(name:"solution", value:"Update to version 3.9.6 once released.

  Contact the vendor at [email protected] to get a fix until then.");

  script_xref(name:"URL", value:"https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/");

  exit(0);
}

CPE = "cpe:/a:matrixssl:matrixssl";

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_equal( version: version, test_version: "3.9.5" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "3.9.6 or contact the vendor" );
  security_message( data: report, port: port );
  exit( 0 );
}

exit( 99 );