01 Record

CVE-2021-31383

Junos OS and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various crafted packets causes RPD to core.

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 and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various crafted packets causes RPD to core.

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: 1.00% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 62.6% 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

2021-10-19 18:17Z5 YR AGO

Last updated

2024-09-16 20:21Z2 YR AGO

Reserved

2021-04-15

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-121Stack-based Buffer OverflowVariant
CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

d8e43780dc7d3794a1504e0a63cbecd6657f3f723bcf76481728953bb49d8afc

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS19.2 to < 19.2R3-S2, 19.3 to < 19.3R2-S6, 19.3R3-S2, 19.4 to < 19.4R1-S4, 19.4R2-S4, 19.4R3-S3, 20.1 to < 20.1R2-S2, 20.1R3, 20.2 to < 20.2R2-S3, 20.2R3, 20.3 to < 20.3R2—

Juniper NetworksJunos OS Evolved20.1 to < 20.1R3-EVO, 20.2 to < 20.2R3-EVO, 20.3 to < 20.3R2-EVO—

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11251x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS: 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3-S3, 20.1R2-S2, 20.1R3, 20.2R2-S3, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases. Junos OS Evolved: 20.1R3-EVO, 20.2R3-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.