5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 High
AI Score
Confidence
High
0.029 Low
EPSS
Percentile
90.8%
# SPDX-FileCopyrightText: 2018 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:ntp:ntp";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.812791");
script_version("2024-02-20T05:05:48+0000");
script_cve_id("CVE-2018-7184");
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:"last_modification", value:"2024-02-20 05:05:48 +0000 (Tue, 20 Feb 2024)");
script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2020-08-24 17:37:00 +0000 (Mon, 24 Aug 2020)");
script_tag(name:"creation_date", value:"2018-03-07 11:57:40 +0530 (Wed, 07 Mar 2018)");
script_name("NTP.org 'ntpd' 'received' Timestamp Denial of Service Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2018 Greenbone AG");
script_family("Denial of Service");
script_dependencies("ntp_open.nasl", "gb_ntp_detect_lin.nasl");
script_mandatory_keys("ntpd/version/detected");
script_xref(name:"URL", value:"http://support.ntp.org/bin/view/Main/NtpBug3453");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/103192");
script_tag(name:"summary", value:"NTP.org's reference implementation of NTP server, ntpd is prone to a denial of service 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 because ntpd in ntp drops
bad packets before updating the 'received' timestamp.");
script_tag(name:"impact", value:"Successful exploitation will allow remote
attackers to cause a denial-of-service condition, denying service to legitimate
users.");
script_tag(name:"affected", value:"NTPd version starting from 4.2.8p4 and prior to 4.2.8p11.");
script_tag(name:"solution", value:"Update to version 4.2.8p11 or later.");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
exit(0);
}
include("version_func.inc");
include("revisions-lib.inc");
include("host_details.inc");
if (isnull(port = get_app_port(cpe: CPE)))
exit(0);
if (!infos = get_app_full(cpe: CPE, port: port, exit_no_version: TRUE))
exit(0);
version = infos["version"];
location = infos["location"];
proto = infos["proto"];
if (version =~ "^4\.2\.8") {
if ((revcomp(a: version, b: "4.2.8p4") >= 0) && (revcomp(a: version, b: "4.2.8p11") < 0)) {
report = report_fixed_ver(installed_version: version, fixed_version: "4.2.8p11", install_path: location);
security_message(port: port, proto: proto, data: report);
exit(0);
}
}
exit(99);
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7 High
AI Score
Confidence
High
0.029 Low
EPSS
Percentile
90.8%