Delve Debugger Unauthorized Access Vulnerability
Description
The application exposes the Delve debugger interface on a network-accessible port without authentication. Delve is a powerful debugging tool for Go applications that provides complete control over program execution, including the ability to inspect memory, modify variables, and control execution flow. When exposed publicly, this creates a critical security vulnerability as the debugger operates with the same privileges as the application itself.
Remediation
Immediately disable the Delve debugger in production environments. If debugging capabilities are required, implement the following controls:
1. Remove debugger flags from production startup commands. Ensure the application is not started with dlv debug, dlv exec, or the --headless flag.
2. If debugging is necessary in non-production environments, restrict access using firewall rules to allow connections only from trusted IP addresses or internal networks.
3. Use environment-specific configuration to ensure the debugger is only enabled in local development:
// Only enable debugging in local development
if os.Getenv("ENVIRONMENT") != "production" {
// Start debugger on localhost only
// Bind to 127.0.0.1 instead of 0.0.0.0
}
4. Implement network segmentation to prevent external access to debugging ports (typically port 2345 or custom ports specified with
--listen).5. Conduct a security review of deployment configurations and CI/CD pipelines to ensure debug flags are not inadvertently included in production builds.