CVE-2023-47633 : Security Advisory and Response

Traefik is an open source HTTP reverse proxy and load balancer. The vulnerability identified as CVE-2023-47633 involves uncontrolled resource consumption in Traefik's docker container, specifically causing 100% CPU usage when serving as its own backend due to an automatically generated route from Docker integration in the default configuration. This vulnerability has been addressed in Traefik versions 2.10.6 and 3.0.0-beta5. Users are strongly advised to update to the patched versions to mitigate the risk.

Understanding CVE-2023-47633

This section dives deeper into the nature and impact of the CVE-2023-47633 vulnerability.

What is CVE-2023-47633?

CVE-2023-47633 involves uncontrolled resource consumption in Traefik's docker container, leading to excessive CPU usage under specific conditions, affecting system performance.

The Impact of CVE-2023-47633

The vulnerability can result in a significant spike in CPU usage, potentially causing system instability and performance degradation, especially when the Traefik docker container serves as its own backend.

Technical Details of CVE-2023-47633

Here, we explore the technical aspects of CVE-2023-47633 to better understand its implications.

Vulnerability Description

The issue stems from the automatic route generation in the default Traefik configuration, causing the docker container to consume 100% CPU, resulting in uncontrolled resource consumption.

Affected Systems and Versions

Vendor: Traefik
Affected Product: Traefik
Vulnerable Versions:
Versions < 2.10.6
Versions >= 3.0.0-beta1, < 3.0.0-beta5

Exploitation Mechanism

The vulnerability can be exploited by running the Traefik docker container in scenarios where it serves as its own backend, triggering the uncontrolled resource consumption.

Mitigation and Prevention

In this section, we discuss the essential steps to mitigate the risks associated with CVE-2023-47633 and prevent potential security breaches.

Immediate Steps to Take

Users are strongly advised to update their Traefik installations to versions 2.10.6 or 3.0.0-beta5 to address the vulnerability and prevent resource consumption issues.

Long-Term Security Practices

Implement monitoring tools to track resource usage and performance metrics of Traefik containers to detect anomalies promptly and take preventive measures.

Patching and Updates

Regularly monitor vendor security advisories and update Traefik to the latest versions promptly to ensure that known vulnerabilities are addressed.