CVE-2021-0226

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

State: Published
Severity: 7.1 High
Published: Apr 22, 2021
Updated: Sep 17, 2024
Reserved: Oct 27, 2020

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	juniper

Weaknesses

CWE-665 Improper Initialization

Affected Products

Product	Versions
Junos OS EvolvedJuniper Networks	19.4-EVO to before 19.4R2-S3-EVOAffected 20.1-EVO to before 20.1R2-S3-EVOAffected 20.2-EVO to before 20.2R2-S1-EVOAffected 20.3-EVO to before 20.3R2-EVOAffected

References

https://kb.juniper.net/JSA11121

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