CVE-2022-22203 Denial of service in Junos OS

What is CVE-2022-22203?

CVE-2022-22203 is a medium-severity denial of service 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

An Incorrect Comparison vulnerability in PFE of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a Denial of Service (DoS). On QFX5000 Series, and EX4600 and EX4650 platforms, the fxpc process will crash followed by the FPC reboot upon receipt of a specific hostbound packet. Continued receipt of these specific packets will create a sustained Denial of Service (DoS) condition. This issue only affects Juniper Networks Junos OS 19.4 version 19.4R3-S4.

Weakness: CWE-697

Which versions are affected by CVE-2022-22203?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2022-22203?

No fix has been published for CVE-2022-22203 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-22203 being exploited?

There is no known exploitation of CVE-2022-22203 in the wild and no public exploit code.

Other vulnerabilities in Juniper Junos

• CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Exploited Critical 9.8
• CVE-2020-1631 Juniper Junos OS Path Traversal Exploited High 8.8
• CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization Exploited Medium 6.7
• CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function Exploited Medium 5.3
• CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification Exploited Medium 5.3

All Juniper Junos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9jvf-2hr4-2rrp.