An Improper Access Control vulnerability in Juniper Networks Junos OS Evolved allows a network-based unauthenticated attacker who is able to connect to a specific open IPv4 port, which in affected releases should otherwise be unreachable, to cause the CPU to consume all resources as more traffic is sent to the port to create a Denial of Service (DoS) condition.
Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
This issue does not affect Junos OS.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-2022-22183.
The following software releases have been updated to resolve this specific issue: 20.4R3-S2-EVO, 21.1R3-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases.This issue is being tracked as PR 1636338 which is visible on the Customer Support website.
Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).
Software Releases, patches and updates are available at https://support.juniper.net/support/downloads/.
There are no available workarounds for this issue.
To reduce the risk of exploitation customers may enable loopback firewall filters on the device to drop unnecessary connections and traffic from untrusted networks and devices.
2022-04-13: Initial Publication.