#VU26241 Resource management error in ntp

Published: 2020-03-19 | Updated: 2023-10-29

Vulnerability identifier: #VU26241

Vulnerability risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13817


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Server applications / Other server solutions

Vendor: ntp.org


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to ntpd uses highly predictable timestamps that can allow spoofing attack over IPv4 or a denial of service attack. A remote non-authenticated attacker can modify clock on the client NTP server to terminate it.

Install updates from vendor's website.

Vulnerable software versions

ntp: 4.0.72 - 4.3.94

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability