rdesktop <= 1.8.4 Denial of Service (DoS) vulnerability

# Copyright (C) 2019 Greenbone Networks GmbH
#
# 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("1.3.6.1.4.1.25623.1.0.113554");
  script_version("2021-09-02T14:01:33+0000");
  script_tag(name:"last_modification", value:"2021-09-02 14:01:33 +0000 (Thu, 02 Sep 2021)");
  script_tag(name:"creation_date", value:"2019-11-04 11:01:11 +0000 (Mon, 04 Nov 2019)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-11-04 18:11:00 +0000 (Mon, 04 Nov 2019)");

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

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

  script_cve_id("CVE-2019-15682");

  script_name("rdesktop <= 1.8.4 Denial of Service (DoS) vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_rdesktop_detect_lin.nasl");
  script_mandatory_keys("rdesktop/detected");

  script_tag(name:"summary", value:"rdesktop 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:"insight", value:"The vulnerability exists because of multiple
  out-of-bound access reads in the code.");
  script_tag(name:"impact", value:"Successful exploitation would allow an attacker to crash the application.");
  script_tag(name:"affected", value:"rdesktop through version 1.8.4.");
  script_tag(name:"solution", value:"Update to version 1.8.5.");

  script_xref(name:"URL", value:"https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/10/30/klcert-19-032-denial-of-service-in-rdesktop-before-1-8-4/");

  exit(0);
}

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

include( "host_details.inc" );
include( "version_func.inc" );

if( ! infos = get_app_version_and_location( cpe: CPE, exit_no_version: TRUE ) ) exit( 0 );
version = infos["version"];
location = infos["location"];

if( version_is_less( version: version, test_version: "1.8.5" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "1.8.5", install_path: location );
  security_message( data: report, port: 0 );
  exit( 0 );
}

exit( 99 );