01 Record

CVE-2021-0291

Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated attacker which sends a high rate of specific traffic to cause a partial Denial of Service

MediumPUBLISHEDCNA: juniper

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

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02 Description

Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated attacker which sends a high rate of specific traffic to cause a partial Denial of Service

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: 6.5 (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:L/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

2021-07-15 20:01Z5 YR AGO

Last updated

2024-09-16 23:50Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

juniper

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

CWE-497Exposure of Sensitive System Information to an Unauthorized Control SphereBase
CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass

Data version

5.1

Document digest

577bdfc02c820759e28b23ff0a393c36c78c5dd4e105d5cb105aff319c07920e

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS15.1 to < 15.1R7-S9, 17.3 to < 17.3R3-S12, 17.4 to < 17.4R2-S13, 17.4R3-S5, 18.3 to < 18.3R3-S5, 18.4 to < 18.4R2-S8, 18.4R3-S9, 19.1 to < 19.1R3-S5, 19.2 to < 19.2R3-S2, 19.3 to < 19.3R2-S6, 19.3R3-S2, 19.4 to < 19.4R1-S4, 19.4R2-S4, 19.4R3, 20.1 to < 20.1R2, 20.2 to < 20.2R2, 20.3 to < 20.3R2—

Juniper NetworksJunos OS Evolved< 20.3R2-EVO—

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11193x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS: 15.1R7-S9, 17.3R3-S12, 17.4R2-S13, 17.4R3-S5, 18.3R3-S5, 18.4R2-S8, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3, 20.1R2, 20.2R2, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases. Junos OS Evolved: 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.