01 Record

CVE-2021-31361

Junos OS: QFX Series and PTX Series: FPC resource usage increases when certain packets are processed which are being VXLAN encapsulated

MediumPUBLISHEDCNA: juniper

CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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02 Description

Junos OS: QFX Series and PTX Series: FPC resource usage increases when certain packets are processed which are being VXLAN encapsulated

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: 1.04% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 64.0% 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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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

2024-09-17 03:44Z2 YR AGO

Reserved

2021-04-15

Assigning CNA

juniper

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

CWE-754Improper Check for Unusual or Exceptional ConditionsClass
CWE-755Improper Handling of Exceptional ConditionsClass

Data version

5.1

Document digest

f9962cc7714f945666e5b0d09565121db7e2872dc5809eef2da942fd3b6889de

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS< 17.3R3-S11, 17.4 to < 17.4R2-S13, 17.4R3-S4, 18.1 to < 18.1R3-S12, 18.2 to < 18.2R2-S8, 18.2R3-S7, 18.3 to < 18.3R3-S4, 18.4 to < 18.4R1-S8, 18.4R2-S7, 18.4R3-S7, 19.1 to < 19.1R1-S6, 19.1R2-S2, 19.1R3-S4, 19.2 to < 19.2R1-S6, 19.2R3-S2, 19.3 to < 19.3R3-S1, 19.4 to < 19.4R2-S3, 19.4R3-S1, 20.1 to < 20.1R2, 20.1R3, 20.2 to < 20.2R2, 20.2R3, 20.3 to < 20.3R1-S1, 20.3R2, < 18.4R3-S9, 19.1 to < 19.1R3-S6, 19.2 to < 19.2R1-S7, 19.2R3-S3, 19.3 to < 19.3R2-S6, 19.3R3-S3, 19.4 to < 19.4R1-S4, 19.4R3-S5, 20.1 to < 20.1R2-S2, 20.1R3, 20.2 to < 20.2R3-S1, 20.3 to < 20.3R2-S1, 20.3R3, 20.4 to < 20.4R2-S1, 20.4R3, 21.1 to < 21.1R1-S1, 21.1R2QFX Series, PTX Series

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11223x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue for QFX Series: 17.3R3-S11, 17.4R2-S13, 17.4R3-S4, 18.1R3-S12, 18.2R2-S8, 18.2R3-S7, 18.3R3-S4, 18.4R1-S8, 18.4R2-S7, 18.4R3-S7, 19.1R1-S6, 19.1R2-S2, 19.1R3-S4, 19.2R1-S6, 19.2R3-S2, 19.3R3-S1, 19.4R2-S3, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2, 20.2R3, 20.3R1-S1, 20.3R2, 20.4R1, and all subsequent releases. The following software releases have been updated to resolve this specific issue for PTX Series: 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R1-S4, 19.4R3-S5, 20.1R2-S2, 20.1R3, 20.2R3-S1, 20.3R2-S1, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases.