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In March 2020, NTP.org[1] released a security advisory detailing a number of security issues. The following vulnerability reported in the NTP advisory is addressed in this document.
| Item | Score | |||
| # | Vulnerability ID | Source | Score | Summary |
| 1 | CVE-2020-13817 | CVSS 3.0 | 7.4 High | ntp: ntpd using highly predictable transmit timestamps could result in time change or DoS[2] |
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 | 4.1.4-GR1-P5 |
| 4.1.1 – 4.1.1-P13 | 4.1.4-GR1-P5 |
| 4.1.100 – 4.1.100-P7 | None |
| 4.1.0 – 4.1.0-P13 | 4.1.4-GR1-P5 |
| 3.1.0-P1 – 3.2.5-P1 | 3.2.5-P2, 5.0.1-TPS |
| 2.8.2 – 2.8.2-P10 | 4.1.4-GR1-P5 |
| 2.7.2 – 2.7.2-P16 | 4.1.4-GR1-P5 |
None
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-2020-13817 |
ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance. |
None
| Revision | Date | Description |
|---|---|---|
| 1.0 | July 27, 2020 |
Initial Publication |
| 2.0 | August 16, 2021 |
Add resolved releases for 3.2.5 |
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