Juniper Junos OS Evolved update for NTP

Published: 2023-07-13 | Updated: 2023-10-29

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-13817 CVE-2020-11868
CWE-ID	CWE-399 CWE-290
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Junos OS Evolved Operating systems & Components / Operating system
Vendor	Juniper Networks, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource management error

EUVDB-ID: #VU26241

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

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.2-EVO - 22.4R1-S2-EVO

External links

http://supportportal.juniper.net/s/article/2023-07-Security-Bulletin-Junos-OS-Evolved-Multiple-NTP-vulnerabilities-resolved

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.

2) Authentication Bypass by Spoofing

EUVDB-ID: #VU27395