SQ40107
Detected container images that might expose the Remote Shell (rsh) port.
| priority | CI/CD status | severity | effort | RL level | RL assessment |
|---|---|---|---|---|---|
 | pass | high | medium | None | None |
About the issue
Containers are a simple, yet powerful approach to process and filesystem isolation. When configured correctly, a container runs a set of processes isolated from their host system. Containers typically run as executables or as services, but regardless of their use, they must be properly secured. Although rsh might seem practical for administration, it is an insecure protocol that transmits unencrypted credentials, and can additionally increase the attack surface by providing an obvious entry point in an environment.
How to resolve the issue
- Avoid running remote access services such as rsh.
- Check if there's a running rsh daemon or service in the container's process list bound to port 514, or if one is executed on startup, and remove it.
Recommended reading
- Docker Expose Port: What It Means and What It Doesn't Mean (External resource - CloudBees)
- RSH - the legacy remote shell tool (External resource - SSH)
- Remote access service (External resource - Wikipedia)