[sssForm]
In March, 2017, NTP.org[1] released a security advisory detailing a number of security issues. The following vulnerabilities reported in the NTP advisory are addressed in this document.
| Item | Score | |||
| # | Vulnerability ID | Source | Score | Summary |
| 1 | CVE-2017-6462 | CVSS 3.0 | 7.8 High | ntp: Buffer Overflow in DPTS Clock [2] |
| 2 | CVE-2017-6451 | CVSS 3.0 | 7.8 High | ntp: Improper use of snprintf() in mx4200_send()[3] |
| 3 | CVE-2016-9042 | CVSS 3.0 | 4.4 Med | ntp: DoS via origin timestamp check functionality [4, 5] |
The table below indicates releases of ACOS exposed to these vulnerabilities and ACOS releases that address these issues or are otherwise unaffected by them.
Customers using affected ACOS releases can overcome vulnerability exposures by updating to the indicated resolved release. If the table does not list a corresponding resolved or unaffected release, then no ACOS release update is currently available.
| Releases Affected | Releases Resolved or Unaffected |
|---|---|
| 5.2.0 | 5.2.0-P1 |
| 5.0.0 – 5.1.0-P4 | 5.1.0-P5 |
| 4.1.4 – 4.1.4-GR1-P4 | 4.1.4-GR1-P5 |
| 4.1.2 – 4.1.2-P1 | 4.1.2-P2 |
| 4.1.1 – 4.1.1-P3 | 4.1.1-P4 |
| 4.1.100 – 4.1.100-P5 | 4.1.100-P5-SP1 |
| 4.1.0 – 4.1.0-P9 | 4.1.0-P10 |
| 3.2.3 – 3.2.5-P1 | 3.2.5-P2, 5.0.1-TPS |
| 3.1.0-P1 – 3.2.1-P1 | 3.2.2-P1, 5.0.1-TPS |
| 2.8.2 – 2.8.2-P8 | 4.1.2-P2, 4.1.4-GR1-P5, 5.1.0-P5, 5.2.0-P1 |
| 2.7.2 – 2.7.2-P11 | 4.1.0-P10, 4.1.1-P4, 4.1.4-GR1-P5, 5.1.0-P5, 5.2.0-P1 |
| 2.7.1-GR1 – 2.7.1-GR1-P1 | 4.1.0-P10, 4.1.1-P4, 4.1.4-GR1-P5, 5.1.0-P5, 5.2.0-P1 |
| 2.6.1-GR1 – 2.6.1-GR1-P16 | 4.1.0-P10, 4.1.1-P4, 4.1.4-GR1-P5, 5.1.0-P5, 5.2.0-P1 |
Common security best practices in the industry for network appliance management and control planes can enhance protection against remote malicious attacks. Limit the exploitable attack surface for critical, infrastructure, networking equipment through the use of access lists or firewall filters to and from only trusted, administrative networks or hosts.
Software updates that address these vulnerabilities are or will be published at the following URL:
http://www.a10networks.com/support/axseries/software-downloads
The following table shares brief descriptions for the vulnerabilities addressed in this document.
| Vulnerability ID | Vulnerability Description |
|---|---|
| CVE-2017-6462 |
Buffer overflow in the legacy Datum Programmable Time Server (DPTS) refclock driver in NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows local users to have unspecified impact via a crafted /dev/datum device. |
| CVE-2017-6451 |
The mx4200_send function in the legacy MX4200 refclock in NTP before 4.2.8p10 and 4.3.x before 4.3.94 does not properly handle the return value of the snprintf function, which allows local users to execute arbitrary code via unspecified vectors, which trigger an out-of-bounds memory write. |
| CVE-2016-9042 |
An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition. This vulnerability can only be exploited if the attacker can spoof all of the servers. |
| Revision | Date | Description |
|---|---|---|
| 1.0 | April 18, 2018 |
Created web page |
| 2.0 | October 11, 2019 |
Added 4.1.100 release family. |
| 3.0 | July 27, 2020 |
Added 4.1.4, 5.x release families, update resolved versions |
| 4.0 | January 22, 2021 |
Added 3.2.3-5, 5.0.1-TPS release families, update resolved versions |
© Copyright 2020 A10 Networks, Inc. All Rights Reserved.
This document is provided on an "AS IS" basis and does not imply any kind of guarantee or warranty, including the warranties of merchantability, non-infringement or fitness for a particular use. Your use of the information in this document or materials linked from this document is at your own risk. A10 Networks, Inc. reserves the right to change or update the information in this document at any time.