01 Record

CVE-2021-0289

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

MediumPUBLISHEDCNA: juniper

CNA base score6.5 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.26% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 17.6% of scored records. A rank, not a probability.
NVD base score: 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-07-15 20:01Z5 YR AGO

Last updated

2024-09-17 03:48Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

juniper

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase

Data version

5.1

Document digest

fddac3c8bd17534d50c0688b6cafa96ef69ecbba38f63c232b0addd6b552b9fb

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS5.6R1 to < 5.6*, 15.1 to < 15.1R7-S10, 16.1R1 to < 16.1*, 16.2R1 to < 16.2*, 17.1R1 to < 17.1*, 17.2R1 to < 17.2*, 17.3R1 to < 17.3*, 17.4R1 to < 17.4*, 18.1R1 to < 18.1*, 18.2R1 to < 18.2*, 18.3R1 to < 18.3*, 18.4 to < 18.4R2-S9, 18.4R3-S9, 19.4 to < 19.4R3-S3, 20.1 to < 20.1R3, 20.2 to < 20.2R3-S2, 20.3R1 to < 20.3*, 20.4 to < 20.4R3, 21.1 to < 21.1R2SRX Series

Juniper NetworksJunos OS EvolvedNot specified—

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11191x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: For all platforms, except SRX Series, using Junos OS 15.1R7-S10, 18.4R2-S9, 18.4R3-S9, 19.4R3-S4, 20.1R3, 20.2R3-S2, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases. On SRX series using Junos OS 18.4R2-S9, 18.4R3-S9, 19.4R3-S4. 20.1R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.