Cloudflare Tunnel Misconfigurations: A Silent Threat in DevOps Pipelines
1 min read
Summary
Cloudflare Tunnel, formerly known as Argo Tunnel, is a popular tool in DevOps pipelines as it allows developers to expose internal services to the internet without the need to open inbound ports.
However, misconfigurations of these tunnels can create vulnerabilities.
Some examples provided include exposing entire machines rather than specific services, not applying access controls or authentication, hardcoding credentials into exposed apps, and mismanaging secrets in pipeline automation.
The author also stresses the importance of monitoring and logging, without which suspicious activities can go unnoticed.
The article provides a Pentesting workflow summary and some security best practices to secure Cloudflare Tunnels.
These include limiting exposure, enforcing access policies, rotating secrets regularly, using service authentication, integrating monitoring, and setting up kill switches.