CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
98.2%
Samba is prone to a use-after-free vulnerability.
# SPDX-FileCopyrightText: 2017 Greenbone AG
# 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-only
CPE = "cpe:/a:samba:samba";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.108294");
script_version("2023-07-25T05:05:58+0000");
script_cve_id("CVE-2017-14746");
script_tag(name:"cvss_base", value:"7.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2022-08-16 13:01:00 +0000 (Tue, 16 Aug 2022)");
script_tag(name:"creation_date", value:"2017-11-23 07:09:22 +0100 (Thu, 23 Nov 2017)");
script_name("Samba Server 'CVE-2017-14746' Use-after-free Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("General");
script_dependencies("smb_nativelanman.nasl", "gb_samba_detect.nasl", "gb_smb_version_detect.nasl");
script_mandatory_keys("samba/smb_or_ssh/detected");
script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2017-14746.html");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/101907");
script_tag(name:"summary", value:"Samba is prone to a use-after-free vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The flaw exists due to a client which may use an SMB1
request to manipulate the contents of heap space.");
script_tag(name:"impact", value:"A malicious SMB1 request can be used to control the contents
of heap memory via a deallocated heap pointer. It is possible this may be used to compromise
the SMB server.");
script_tag(name:"affected", value:"Samba versions 4.0.0 to 4.5.14, 4.6.x prior to 4.6.11, 4.7.x
prior to 4.7.3 with enabled SMBv1 support.");
script_tag(name:"solution", value:"Update to Samba 4.5.15, 4.6.11, 4.7.3 or later. Workaround:
Prevent SMB1 access to the server by setting the parameter:
server min protocol = SMB2
to the [global] section of your smb.conf and restart smbd. This prevents a SMB1 access to the
server. Note this could cause older clients to be unable to connect to the server.");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
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'];
loc = infos['location'];
# Workaround is to disable SMBv1 support
if( ! get_kb_item( "smb_v1/supported" ) ) exit( 0 );
if( version_in_range( version:vers, test_version:"4.0.0", test_version2:"4.5.14" ) ) {
fix = "4.5.15";
} else if( version_in_range( version:vers, test_version:"4.6.0", test_version2:"4.6.10" ) ) {
fix = "4.6.11";
} else if( version_in_range( version:vers, test_version:"4.7.0", test_version2:"4.7.2" ) ) {
fix = "4.7.3";
}
if( fix ) {
report = report_fixed_ver( installed_version:vers, fixed_version:fix, install_path:loc );
security_message( port:port, data:report );
exit( 0 );
}
exit( 99 );
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
98.2%