FreeRDP > 1.1.0 & < 2.0.0 Multiple Out-of-Bounds Read Vulnerabilities

# Copyright (C) 2020 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("1.3.6.1.4.1.25623.1.0.112743");
  script_version("2021-08-16T09:00:57+0000");
  script_tag(name:"last_modification", value:"2021-08-16 09:00:57 +0000 (Mon, 16 Aug 2021)");
  script_tag(name:"creation_date", value:"2020-05-13 08:54:57 +0000 (Wed, 13 May 2020)");
  script_tag(name:"cvss_base", value:"4.9");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:P/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-30 02:15:00 +0000 (Sun, 30 Aug 2020)");

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

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

  script_cve_id("CVE-2020-11042", "CVE-2020-11047", "CVE-2020-11049");

  script_name("FreeRDP > 1.1.0 & < 2.0.0 Multiple Out-of-Bounds Read Vulnerabilities");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_freerdp_detect_lin.nasl");
  script_mandatory_keys("FreeRDP/Linux/Ver");

  script_tag(name:"summary", value:"FreeRDP is prone to multiple out-of-bounds read vulnerabilities.");

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

  script_tag(name:"insight", value:"The following out-of-bounds read vulnerabilities exist:

  - Reading an attacker-defined amount of client memory (32bit unsigned -> 4GB) to an intermediate buffer (CVE-2020-11042)

  - An out-of-bounds read in autodetect_recv_bandwidth_measure_results.
  A malicious server can extract up to 8 bytes of client memory with a manipulated message by providing
  a short input and reading the measurement result data (CVE-2020-11047)

  - An out-of-bounds read of client memory that is then passed on to the protocol parser (CVE-2020-11049)");

  script_tag(name:"impact", value:"Successful exploitation would allow an attacker to crash the client
  or store information for later retrieval.");

  script_tag(name:"affected", value:"FreeRDP after 1.1.0 and before 2.0.0.");

  script_tag(name:"solution", value:"Update FreeRDP to version 2.0.0 or later.");

  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/issues/6008");
  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/issues/6009");
  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/issues/6010");
  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9jp6-5vf2-cx2q");
  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9fw6-m2q8-h5pw");
  script_xref(name:"URL", value:"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wwh7-r2r8-xjpr");


  exit(0);
}

CPE = "cpe:/a:freerdp_project:freerdp";

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_greater( version: version, test_version: "1.1.0" ) &&
    version_is_less( version: version, test_version: "2.0.0" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "2.0.0", install_path: location );
  security_message( data: report, port: 0 );
  exit( 0 );
}

exit( 99 );