01 Record

CVE-2021-31365

Junos OS: EX2300, EX3400 and EX4300 Series: An Aggregated Ethernet (AE) interface will go down due to a stream of specific layer 2 frames

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

View raw JSON

02 Description

Junos OS: EX2300, EX3400 and EX4300 Series: An Aggregated Ethernet (AE) interface will go down due to a stream of specific layer 2 frames

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: 0.39% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 33.6% of scored records. A rank, not a probability.
NVD base score: 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:A/AC:L/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

2021-10-19 18:16Z5 YR AGO

Last updated

2024-09-16 20:52Z2 YR AGO

Reserved

2021-04-15

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-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

3f6e7f2718d631799c3cdaee921d68444d27d1ee777a0d42aa9ec384f5f88645

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS< 15.1R7-S7, 16.1 to < 16.1R7-S8, 17.1 to < 17.1R2-S12, 17.2 to < 17.2R3-S4, 17.3 to < 17.3R3-S8, 17.4 to < 17.4R2-S10, 17.4R3-S2, 18.1 to < 18.1R3-S10, 18.2 to < 18.2R2-S7, 18.2R3-S3, 18.3 to < 18.3R2-S4, 18.3R3-S2, 18.4 to < 18.4R1-S7, 18.4R2-S4, 18.4R3-S1, 19.1 to < 19.1R1-S5, 19.1R2-S1, 19.1R3, 19.2 to < 19.2R1-S5, 19.2R2, 19.3 to < 19.3R2-S2, 19.3R3, 19.4 to < 19.4R1-S2, 19.4R2, < 18.1R3-S12, 18.2 to < 18.2R3-S7, 18.3 to < 18.3R3-S4, 18.4 to < 18.4R2-S9, 18.4R3-S7, 19.1 to < 19.1R2-S3, 19.1R3-S4, 19.2 to < 19.2R3-S1, 19.3 to < 19.3R3-S1, 19.4 to < 19.4R3-S1, 20.1 to < 20.1R3, 20.2 to < 20.2R3, 20.3 to < 20.3R2, < 18.3R3-S5, 18.4 to < 18.4R2-S9, 18.4R3-S9, 19.1 to < 19.1R2-S3, 19.1R3-S6, 19.2 to < 19.2R1-S7, 19.2R3-S3, 19.3 to < 19.3R2-S7, 19.3R3-S3, 19.4 to < 19.4R3-S5, 20.1 to < 20.1R2-S2, 20.1R3-S1, 20.2 to < 20.2R3-S2, 20.3 to < 20.3R3-S1, 20.4 to < 20.4R2-S1, 20.4R3, 21.1 to < 21.1R2EX4300 Series, EX3400 Series, EX4300-MP Series, EX2300 Series

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11227x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue in Junos OS - For EX4300 Series: 15.1R7-S7, 16.1R7-S8, 17.1R2-S12, 17.2R3-S4, 17.3R3-S8, 17.4R2-S10, 17.4R3-S2, 18.1R3-S10, 18.2R2-S7, 18.2R3-S3, 18.3R2-S4, 18.3R3-S2, 18.4R1-S7, 18.4R2-S4, 18.4R3-S1, 19.1R1-S5, 19.1R2-S1, 19.1R3, 19.2R2, 19.3R2-S2, 19.3R3, 19.4R1-S2, 19.4R2, 20.1R1, and all subsequent releases. - For EX3400 and EX4300-MP Series: 18.1R3-S12, 18.2R3-S7, 18.3R3-S4, 18.4R2-S9, 18.4R3-S7, 19.1R2-S3, 19.1R3-S4, 19.2R3-S1, 19.3R3-S1, 19.4R3-S1, 20.1R3, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases. -For EX2300 Series: 18.3R3-S5, 18.4R2-S9, 18.4R3-S9, 19.1R2-S3, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S7, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3-S1, 20.4R2-S1, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.