Nacos Information Disclosure Scanner

Nacos, a dynamic service discovery, configuration, and service management platform, is primarily used in microservice architecture environments. Developed by Alibaba, it aids developers in managing configurations and services efficiently. It streamlines the deployment of applications by storing service metadata in a centralized location. Nacos is often employed in environments demanding high availability and scalability. It helps operations teams to ensure the consistent configuration across massive numbers of services. The platform is widely used in cloud-native applications due to its robust service management capabilities.

Information Disclosure vulnerabilities in software such as Nacos can inadvertently expose sensitive data, such as configuration files or metadata, to unauthorized users. Attacking parties leverage this access to uncover internal server details, configuration files, or even cryptographic keys if improperly secured. Information Disclosure vulnerabilities can arise due to improper access controls or lack of authentication requirements. Such exposures can lead to further exploitation if attackers obtain sensitive information like user credentials or API keys. The existence of this vulnerability poses a significant risk to data confidentiality and system integrity. The exploitation of this vulnerability requires no authentication, making all users vulnerable without sufficient security safeguards.

The Nacos platform is susceptible to information disclosure due to unauthorized download capabilities of its configuration files. The vulnerable endpoint, as detailed in the nuclei template, allows unauthenticated requests to retrieve sensitive configuration data. By issuing a GET request, malicious actors can download critical files, which are identified through file type or specific headers. The requests return data when the response contains certain identifiers like "PK" or specific content types denoting a file download. This lack of authorization control exposes configuration parameters that could be used by attackers to further escalate attacks within the network.

If exploited, this vulnerability can lead to unauthorized access to sensitive configuration files, resulting in a breach of confidentiality. Attackers might acquire configuration details that can be used to hijack sessions, alter service configurations, or even launch more sophisticated attacks. The disclosed information could provide critical insights into the target's infrastructure, network topology, or service architecture, potentially facilitating cyber-espionage or intellectual property theft. Furthermore, it may lead to reputational damage and legal consequences if user data is leaked. Organizations leveraging Nacos need to address this vulnerability promptly to avoid any data breach or security incident.

REFERENCES

• https://github.com/wy876/POC/blob/main/Nacos/Nacos%E6%9C%AA%E6%8E%88%E6%9D%83%E4%B8%8B%E8%BD%BD%E9%85%8D%E7%BD%AE%E4%BF%A1%E6%81%AF.md