OpenSSL 'kssl_keytab_is_available()' DoS Vulnerability - Windows

# Copyright (C) 2010 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("1.3.6.1.4.1.25623.1.0.800490");
  script_version("2021-06-30T11:32:25+0000");
  script_tag(name:"last_modification", value:"2021-06-30 11:32:25 +0000 (Wed, 30 Jun 2021)");
  script_tag(name:"creation_date", value:"2010-03-10 15:48:25 +0100 (Wed, 10 Mar 2010)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_cve_id("CVE-2010-0433");
  script_name("OpenSSL 'kssl_keytab_is_available()' DoS Vulnerability - Windows");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_openssl_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("openssl/detected", "Host/runs_windows");

  script_xref(name:"URL", value:"http://seclists.org/oss-sec/2010/q1/175");
  script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=569774");
  script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=567711");
  script_xref(name:"URL", value:"http://permalink.gmane.org/gmane.comp.security.oss.general/2636");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker to cause DoS
  conditions.");

  script_tag(name:"affected", value:"OpenSSL version prior to 0.9.8n.");

  script_tag(name:"insight", value:"The flaw is due to error in 'kssl_keytab_is_available()'
  function in 'ssl/kssl.c' which does not check a certain return value when Kerberos is enabled.
  This allows NULL pointer dereference and daemon crash via SSL cipher negotiation.");

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

  script_tag(name:"summary", value:"OpenSSL is prone to a denial of service (DoS) vulnerability.");

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

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

  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( version_is_less( version:vers, test_version:"0.9.8n" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"0.9.8n", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );