CVE-2021-0226 - CVE House

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Status published High CVE-2021-0226

Junos OS Evolved: The IPv6 BGP session will flap due to receipt of a specific IPv6 packet

7.1 CVSS

Vulnerability Description

On Juniper Networks Junos OS Evolved devices, receipt of a specific IPv6 packet may cause an established IPv6 BGP session to terminate, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue does not affect IPv4 BGP sessions. This issue affects IBGP or EBGP peer sessions with IPv6. This issue affects: Juniper Networks Junos OS Evolved: 19.4 versions prior to 19.4R2-S3-EVO; 20.1 versions prior to 20.1R2-S3-EVO; 20.2 versions prior to 20.2R2-S1-EVO; 20.3 versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS releases.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

https://kb.juniper.net/JSA11121

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Affected Vendor

Juniper Networks

View all reports →

Affected Software

Junos OS Evolved

Vulnerable Versions:

19.4-EVO, 20.1-EVO, 20.2-EVO, 20.3-EVO

Timeline

Official Publish: April 22nd, 2021

Last Modified: September 17th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.