An Allocation of Resources Without Limits or Throttling vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows unauthenticated network based attacker to cause a Denial of Service (DoS).
 

On all Junos Evolved platforms hostbound protocols will be impacted by a high rate of specific hostbound traffic from ports on a PFE. Continued receipt of this amount of traffic will create a sustained Denial of Service (DoS) condition.
 

This issue affects Juniper Networks Junos OS Evolved:

• 21.2 versions prior to 21.2R3-EVO;
• 21.3 versions prior to 21.3R2-EVO.

This issue does not affect Juniper Networks Junos OS Evolved versions prior to 21.2R1.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

This issue has been assigned CVE-2022-22212.
 

The following software releases have been updated to resolve this specific issue: 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.
 

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
 

This issue is being tracked as 1627344.
 

There are no viable workarounds for this issue.
 

To reduce the risk of exploitation of this issue, use access lists or firewall filters to limit access to only trusted networks, hosts and users.

2022-07-13: Initial publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team