CVE-2022-22210 Junos OS: QFX5000 Series and MX Series: An l2alm crash leading to an FPC crash can be observed in VxLAN scenario

Medium 6.5 Published 20 Jul 2022 Updated 16 Sep 2024

An unauthenticated adjacent attacker can cause a sustained denial of service on Juniper QFX5000 and MX series devices by sending specific VxLAN packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-22210?

CVE-2022-22210 is a medium-severity vulnerability in Juniper Junos, published on 20 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A NULL Pointer Dereference vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on QFX5000 Series and MX Series allows an unauthenticated adjacent attacker to cause a Denial of Service (DoS). On QFX5K Series and MX Series, when the PFE receives a specific VxLAN packet the Layer 2 Address Learning Manager (L2ALM) process will crash leading to an FPC reboot. Continued receipt of this specific packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on QFX5000 Series, MX Series: 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2; 21.2 versions prior to 21.2R2-S1. This issue does not affect Juniper Networks Junos OS: All versions prior to 20.3R1; 21.1 version 21.1R1 and later versions.

Weakness: CWE-476

Which versions are affected by CVE-2022-22210?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2022-22210?

No fix has been published for CVE-2022-22210 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-22210 being exploited?

There is no known exploitation of CVE-2022-22210 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-468h-vwvc-rxx5.