CVE-2022-22219

Name: CVE-2022-22219
Creator: NVD / NIST
Published: 2022-10-18T03:15:09.577+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.56%

Last modified Jun 17, 2026

CVE-2022-22219 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Due to the Improper Handling of an Unexpected Data Type in the processing of EVPN routes on Juniper Networks Junos OS and Junos OS Evolved, an attacker in direct control of a BGP client connected to a route reflector, or via a machine in the middle (MITM) attack, can send a specific EVPN route contained within a BGP Update, triggering a routing protocol daemon (RPD) crash, leading to a Denial of Service (DoS) condition. Continued receipt and processing of these specific EVPN routes could create a sustained Denial of Service (DoS) condition. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

Description

Due to the Improper Handling of an Unexpected Data Type in the processing of EVPN routes on Juniper Networks Junos OS and Junos OS Evolved, an attacker in direct control of a BGP client connected to a route reflector, or via a machine in the middle (MITM) attack, can send a specific EVPN route contained within a BGP Update, triggering a routing protocol daemon (RPD) crash, leading to a Denial of Service (DoS) condition. Continued receipt and processing of these specific EVPN routes could create a sustained Denial of Service (DoS) condition. This issue only occurs on BGP route reflectors, only within a BGP EVPN multicast environment, and only when one or more BGP clients have 'leave-sync-route-oldstyle' enabled. This issue affects: Juniper Networks Junos OS 21.3 versions prior to 21.3R3-S2; 21.4 versions prior to 21.4R2-S2, 21.4R3; 22.1 versions prior to 22.1R1-S2, 22.1R3; 22.2 versions prior to 22.2R2. Juniper Networks Junos OS Evolved 21.3 version 21.3R1-EVO and later versions prior to 21.4R3-EVO; 22.1 versions prior to 22.1R1-S2-EVO, 22.1R3-EVO; 22.2 versions prior to 22.2R2-EVO. This issue does not affect: Juniper Networks Junos OS versions prior to 21.3R1. Juniper Networks Junos OS Evolved versions prior to 21.3R1-EVO.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.56%

42.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-241

Affected Software

Vendor	Product	Versions	Update
Juniper	Junos	21.3	—
Juniper	Junos	21.4	—
Juniper	Junos	22.1	R1
Juniper	Junos	22.2	R1
Juniper	Junos Os Evolved	21.3	R1
Juniper	Junos Os Evolved	22.1	R1
Juniper	Junos Os Evolved	22.2	R1

References

https://kb.juniper.net/JSA69898Mitigation, Vendor Advisory
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/ref/statement/evpn-edit-routing-instances-protocols.htmlVendor Advisory
https://kb.juniper.net/JSA69898Mitigation, Vendor Advisory
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/ref/statement/evpn-edit-routing-instances-protocols.htmlVendor Advisory

Timeline

Published: Oct 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-22219?

How severe is CVE-2022-22219?

CVE-2022-22219 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2022-22219?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-22219?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST