NTP is prone to a denial of service (DoS) vulnerability.
# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.146233");
script_version("2024-02-20T05:05:48+0000");
script_tag(name:"last_modification", value:"2024-02-20 05:05:48 +0000 (Tue, 20 Feb 2024)");
script_tag(name:"creation_date", value:"2021-07-07 08:10:44 +0000 (Wed, 07 Jul 2021)");
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:"severity_vector", value:"CVSS:3.1/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:"2021-04-19 15:13:00 +0000 (Mon, 19 Apr 2021)");
script_cve_id("CVE-2015-5219");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("NTP < 4.2.7p367 DoS Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Denial of Service");
script_dependencies("ntp_open.nasl", "gb_ntp_detect_lin.nasl");
script_mandatory_keys("ntpd/version/detected");
script_tag(name:"summary", value:"NTP is prone to a denial of service (DoS) vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The ULOGTOD function in ntp.d in SNTP does not properly perform
type conversions from a precision value to a double, which allows remote attackers to cause a
denial of service (infinite loop) via a crafted NTP packet.");
script_tag(name:"affected", value:"NTPd version 4.2.7p366 and prior.");
script_tag(name:"solution", value:"Update to version 4.2.7p367 or later.");
script_xref(name:"URL", value:"https://www.openwall.com/lists/oss-security/2015/08/25/3");
script_xref(name:"URL", value:"https://github.com/ntp-project/ntp/commit/5f295cd05c3c136d39f5b3e500a2d781bdbb59c8");
exit(0);
}
include("host_details.inc");
include("version_func.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_is_less(version: version, test_version: "4.2.7p367")) {
report = report_fixed_ver(installed_version: version, fixed_version: "4.2.7p367", install_path: location);
security_message(port: port, proto: proto, data: report);
exit(0);
}
exit(99);