4.9 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
5.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
6.3 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.0%
When the password contains multi-byte (non-ASCII) characters, the check password
script of Samba AD DC does not receive the full password string.
# Copyright (C) 2019 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:samba:samba";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.108693");
script_version("2021-09-06T11:01:35+0000");
script_tag(name:"last_modification", value:"2021-09-06 11:01:35 +0000 (Mon, 06 Sep 2021)");
script_tag(name:"creation_date", value:"2019-10-30 13:40:29 +0000 (Wed, 30 Oct 2019)");
script_tag(name:"cvss_base", value:"4.9");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:P/I:P/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-05-29 13:15:00 +0000 (Sat, 29 May 2021)");
script_cve_id("CVE-2019-14833");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Samba AD DC Check Password Script Weakness (CVE-2019-14833)");
script_category(ACT_GATHER_INFO);
script_copyright("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:"When the password contains multi-byte (non-ASCII) characters, the check password
script of Samba AD DC does not receive the full password string.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Since Samba Version 4.5.0 a Samba AD DC can use a custom command to verify the
password complexity. The command can be specified with the 'check password script' smb.conf parameter. This command
is called when Samba handles a user password change or a new user password is set. The script receives the new
cleartext password string in order to run custom password complexity checks like dictionary checks to avoid weak
user passwords.
When the password contains multi-byte (non-ASCII) characters, the check password script does not receive the full
password string.");
script_tag(name:"affected", value:"Samba 4.5.0 and later");
script_tag(name:"solution", value:"Update to version 4.11.2, 4.10.10, 4.9.15 or later.");
script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2019-14833.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: "4.5.0", test_version2: "4.9.14")) {
report = report_fixed_ver(installed_version: version, fixed_version: "4.9.15", install_path: path);
security_message(port: port, data: report);
exit(0);
}
if (version_in_range(version: version, test_version: "4.10.0", test_version2: "4.10.9")) {
report = report_fixed_ver(installed_version: version, fixed_version: "4.10.10", install_path: path);
security_message(port: port, data: report);
exit(0);
}
if (version_in_range(version: version, test_version: "4.11.0", test_version2: "4.11.1")) {
report = report_fixed_ver(installed_version: version, fixed_version: "4.11.2", install_path: path);
security_message(port: port, data: report);
exit(0);
}
exit(99);
4.9 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:P/I:P/A:N
5.4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
6.3 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
47.0%