This article discusses the security risks associated with misconfigured Docker registries, featuring a firsthand account of exploiting such a vulnerability to gain unauthorized access to sensitive data. The author provides a detailed walkthrough on discovering open Docker registries, extracting information from images, and even injecting a backdoored image if the registry permits. Affected: Docker registries, application developers, cybersecurity practitioners
Keypoints :
- Misconfigured Docker registries can expose sensitive container images.
- Open registries may contain hardcoded credentials and API keys.
- Methods for discovering open Docker registries include using FOFA, Shodan, and Google Dorks.
- Nmap can scan for Docker Registry APIs on common ports.
- Extracting images allows access to stored credentials and configuration files.
- Weak MySQL configurations can be discovered within extracted images.
- If allowed, injecting a backdoored image can compromise the system.
- Preventative measures include disabling anonymous access and enforcing secure configurations.