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CVE-2021-0226 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://kb.juniper.net/JSA11121	CVE	Vendor Advisory
https://kb.juniper.net/JSA11121	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-665	Improper Initialization	[email protected]
CWE-665	Improper Initialization	[email protected]

Affected Products

Product	Versions
juniper junos os evolved	20.1 r1 20.1 r1-s1 20.1 r2 20.1 r2-s1 20.1 r2-s2
CPE cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:::::: cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s2:::::: cpe:2.3:o:juniper:junos_os_evolved:20.2:r1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.2:r1-s1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.2:r2:::::: cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:::::: cpe:2.3:o:juniper:junos_os_evolved:20.3:r1-s1:::::: Remediation No remediation found in references.

Product

Versions

juniper junos os evolved

20.1 r1

20.1 r1-s1

20.1 r2

20.1 r2-s1

20.1 r2-s2

CPE

cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.1:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.1:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.2:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.2:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:20.3:r1-s1:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 7, 2021	Reanalysis	[email protected]
Apr 27, 2021	Initial Analysis	[email protected]