CVE record · CVE-2021-0289

Junos OS: User-defined ARP Policer isn't applied on Aggregated Ethernet (AE) interface until firewall process is restarted

CVSS 6.5 MediumEPSS 0.0026 · 17th percentile

Published by the CVE Program (CNA: juniper) at 15 Jul 2021, 20:01 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Juniper Networks	Junos OS	unaffected unspecified to before 5.6R1 custom affected 5.6R1 to before 5.6* custom affected 15.1 to before 15.1R7-S10 custom affected 16.1R1 to before 16.1* custom affected 16.2R1 to before 16.2* custom affected 17.1R1 to before 17.1* custom affected 17.2R1 to before 17.2* custom affected 17.3R1 to before 17.3* custom affected 17.4R1 to before 17.4* custom affected 18.1R1 to before 18.1* custom affected 18.2R1 to before 18.2* custom affected 18.3R1 to before 18.3* custom and 7 more
Juniper Networks	Junos OS	affected 18.4 to before 18.4R2-S9, 18.4R3-S9 custom affected 19.4 to before 19.4R3-S3 custom affected 20.1 to before 20.1R3 custom unaffected 20.2 to before 20.2R3-S2 custom affected 20.3R1 to before 20.3* custom affected 20.4 to before 20.4R3 custom affected 21.1 to before 21.1R2 custom
Juniper Networks	Junos OS Evolved	unaffected Any

Identifiers: CVE-2021-0289
CNA: juniper
Weakness (CWE): CWE-367
Tags: Juniper Networks Junos OS
Juniper Networks Junos OS Evolved
Race condition
Published: 15 Jul 2021
Updated: 17 Sept 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (juniper)

CISA KEV Not listed.
EPSS 0.0026, the 17th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Jul 2021. New records show when each source confirmed them.

Sources

References from the CNA

kb.juniper.net/JSA11191 confirm

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.