F5 Networks BIG-IP : NTP vulnerability (K17114)

medium Nessus Plugin ID 105510


The remote device is missing a vendor-supplied security patch.


ntpd in ntp before 4.2.8p3 with remote configuration enabled allows remote authenticated users with knowledge of the configuration password and access to a computer entrusted to perform remote configuration to cause a denial of service (service crash) via a NULL byte in a crafted configuration directive packet. (CVE-2015-5146)

An attacker can use a specially crafted package to cause ntpd to become unresponsive when all of the following conditions are met :

The ntpd configuration has enabled remote configuration.

The attacker has knowledge of the configuration password.

The attacker has access to a computer entrusted to perform remote configurations.


For BIG-IP systems using a default network time protocol (NTP) configuration, there is no impact. However, BIG-IP systems with an NTP configuration that is customized in line with the requirements of the advisory may be vulnerable.


Upgrade to one of the non-vulnerable versions listed in the F5 Solution K17114.

See Also


Plugin Details

Severity: Medium

ID: 105510

File Name: f5_bigip_SOL17114.nasl

Version: 3.6

Type: local

Published: 1/3/2018

Updated: 3/10/2021

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Low

Base Score: 3.5

Temporal Score: 3

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/h:f5:big-ip, cpe:/h:f5:big-ip_protocol_security_manager

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Ease: No known exploits are available

Patch Publication Date: 8/13/2015

Vulnerability Publication Date: 8/24/2017

Reference Information

CVE: CVE-2015-5146

BID: 75589