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OpenSSL: OCSP Stapling Vulnerability (20110208) - Linux

🗓️ 16 Aug 2021 00:00:00Reported by Copyright (C) 2021 Greenbone Networks GmbHType 
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OpenSSL OCSP Stapling Vulnerability (20110208) affects Linux systems with versions 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c. The vulnerability can be exploited through incorrectly formatted ClientHello handshake messages, potentially causing denial of service

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Code
# Copyright (C) 2021 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:openssl:openssl";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.112951");
  script_version("2021-08-30T10:29:27+0000");
  script_tag(name:"last_modification", value:"2021-08-30 10:29:27 +0000 (Mon, 30 Aug 2021)");
  script_tag(name:"creation_date", value:"2021-08-16 10:54:11 +0000 (Mon, 16 Aug 2021)");
  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_cve_id("CVE-2011-0014");

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

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

  script_name("OpenSSL: OCSP Stapling Vulnerability (20110208) - Linux");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_openssl_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("openssl/detected", "Host/runs_unixoide");

  script_tag(name:"summary", value:"OpenSSL is prone to an OCSP stapling vulnerability.");

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

  script_tag(name:"insight", value:"Incorrectly formatted ClientHello handshake messages could
  cause OpenSSL to parse past the end of the message.");

  script_tag(name:"affected", value:"OpenSSL 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c.");

  script_tag(name:"solution", value:"Update to version 0.9.8r, 1.0.0d or later.");

  script_xref(name:"URL", value:"https://www.openssl.org/news/secadv/20110208.txt");

  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);

version = infos["version"];
location = infos["location"];

if (version_in_range(version: version, test_version: "0.9.8h", test_version2: "0.9.8q")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "0.9.8r", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "1.0.0", test_version2: "1.0.0c")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.0.0d", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);

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16 Aug 2021 00:00Current
9.1High risk
Vulners AI Score9.1
CVSS25
EPSS0.093
10
.json
Report