01 Record

CVE-2020-1679

Junos OS: PTX/QFX Series: Kernel Routing Table (KRT) queue stuck after packet sampling a malformed packet when the tunnel-observation mpls-over-udp configuration is enabled.

HighPUBLISHEDCNA: juniper

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

Junos OS: PTX/QFX Series: Kernel Routing Table (KRT) queue stuck after packet sampling a malformed packet when the tunnel-observation mpls-over-udp configuration is enabled.

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: 1.24% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 68.6% of scored records. A rank, not a probability.
NVD base score: 7.5 (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: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

2020-10-16 20:31Z6 YR AGO

Last updated

2024-09-16 19:19Z2 YR AGO

Reserved

2019-11-04

Assigning CNA

juniper

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

b9b6cce6c9021ad071d587f1159c9dcc4f86334e9522548af49eed2e5dd5d424

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS17.2X75 to < 17.2X75-D105, 18.1 to < 18.1R3-S11, 18.2 to < 18.2R3-S5, 18.2X75 to < 18.2X75-D420, 18.2X75-D53, 18.2X75-D65, 18.3 to < 18.3R2-S4, 18.3R3-S3, 18.4 to < 18.4R1-S7, 18.4R2-S5, 18.4R3-S4, 19.1 to < 19.1R2-S2, 19.1R3-S2, 19.2 to < 19.2R1-S5, 19.2R3, 19.3 to < 19.3R2-S3, 19.3R3, 19.4 to < 19.4R1-S2, 19.4R2-S1, 19.4R3, 20.1 to < 20.1R1-S2, 20.1R2PTX, QFX

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11076x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS 17.2X75-D105, 18.1R3-S11, 18.2R3-S5, 18.2X75-D420, 18.2X75-D53, 18.2X75-D65, 18.3R2-S4, 18.3R3-S3, 18.4R1-S7, 18.4R2-S5, 18.4R3-S4, 19.1R2-S2, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S3, 19.3R3, 19.4R1-S2, 19.4R2-S1, 19.4R3, 20.1R1-S2, 20.1R2, 20.2R1, 20.3X75-D10, and all subsequent releases.