Samba Path/Symlink Traversal Vulnerability (CVE-2019-3880)

2019-05-09T00:00:00
ID OPENVAS:1361412562310142391
Type openvas
Reporter This script is Copyright (C) 2019 Greenbone Networks GmbH
Modified 2019-05-09T00:00:00

Description

Samba is prone to a path/symlink traversal vulnerability.

                                        
                                            # Copyright (C) 2019 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) of the respective author(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:samba:samba';

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142391");
  script_version("2019-05-09T14:21:05+0000");
  script_tag(name:"last_modification", value:"2019-05-09 14:21:05 +0000 (Thu, 09 May 2019)");
  script_tag(name:"creation_date", value:"2019-05-09 13:54:40 +0000 (Thu, 09 May 2019)");
  script_tag(name:"cvss_base", value:"5.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:P/A:P");

  script_cve_id("CVE-2019-3880");

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

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

  script_name("Samba Path/Symlink Traversal Vulnerability (CVE-2019-3880)");

  script_category(ACT_GATHER_INFO);

  script_copyright("This script is Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("smb_nativelanman.nasl", "gb_samba_detect.nasl");
  script_mandatory_keys("samba/smb_or_ssh/detected");

  script_tag(name:"summary", value:"Samba is prone to a path/symlink traversal vulnerability.");

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

  script_tag(name:"insight", value:"A flaw was found in the way samba implemented an RPC endpoint emulating the
  Windows registry service API. An unprivileged attacker could use this flaw to create a new registry hive file
  anywhere they have unix permissions which could lead to creation of a new file in the Samba share.");

  script_tag(name:"affected", value:"Samba 3.2.0 and later.");

  script_tag(name:"solution", value:"Update to version 4.8.11, 4.9.6, 4.10.2 or later.");

  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2019-3880.html");

  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'];
path = infos['location'];

if (version_in_range(version: version, test_version: "3.2.0", test_version2: "4.8.10")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.8.11", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "4.9.0", test_version2: "4.9.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.9.6", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "4.10.0", test_version2: "4.10.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.10.2", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);