OpenSSH <= 5.8 Multiple DoS Vulnerabilities

# Copyright (C) 2014 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:openbsd:openssh";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103937");
  script_cve_id("CVE-2011-5000", "CVE-2010-4755");
  script_version("2021-06-07T05:38:52+0000");
  script_name("OpenSSH <= 5.8 Multiple DoS Vulnerabilities");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_tag(name:"last_modification", value:"2021-06-07 05:38:52 +0000 (Mon, 07 Jun 2021)");
  script_tag(name:"creation_date", value:"2014-04-09 12:03:56 +0200 (Wed, 09 Apr 2014)");
  script_category(ACT_GATHER_INFO);
  script_family("Denial of Service");
  script_copyright("Copyright (C) 2014 Greenbone Networks GmbH");
  script_dependencies("gb_openssh_consolidation.nasl");
  script_mandatory_keys("openssh/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/54114");
  script_xref(name:"URL", value:"http://seclists.org/fulldisclosure/2011/Aug/2");

  script_tag(name:"summary", value:"OpenSSH is prone to multiple Denial of Service (DoS)
  vulnerabilities.");

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

  script_tag(name:"impact", value:"Exploiting this issue allows remote attackers to trigger
  denial-of-service conditions due to excessive memory consumption.");

  script_tag(name:"solution", value:"Updates are available. Please see the references for details.");

  script_tag(name:"affected", value:"OpenSSH 5.8 and prior are vulnerable.");

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

  exit(0);
}

include("version_func.inc");
include("host_details.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_equal( version:vers, test_version:"5.8" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"See references", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );