CVE-2022-4066 davidmoreno onion Log response.c onion_response_flush allocation of resources

Low 3.5 Published 19 Nov 2022 Updated 15 Apr 2025

Attackers can cause resource exhaustion in the Onion HTTP library's log handler, leading to denial of service.

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

What is CVE-2022-4066?

CVE-2022-4066 is a low-severity denial of service vulnerability in Mozilla Firefox, published on 19 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability was found in davidmoreno onion. It has been rated as problematic. Affected by this issue is the function onion_response_flush of the file src/onion/response.c of the component Log Handler. The manipulation leads to allocation of resources. The name of the patch is de8ea938342b36c28024fd8393ebc27b8442a161. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-214028.

Weakness: CWE-404

Which versions are affected by CVE-2022-4066?

It affects 2 products.

Products include Mozilla Firefox, Onion Project Onion.

How do I fix CVE-2022-4066?

No fix has been published for CVE-2022-4066 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-2022-4066 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4066 exists.

All Mozilla Firefox vulnerabilities

Sources

Also known as GHSA-qrmh-rjwm-6mq4.