HummerRisk Command Injection Vulnerability in Cloud Compliance Scanning

A critical command injection vulnerability has been identified in HummerRisk versions through 1.5.0, specifically within the cloud compliance scanning component. The issue arises in the 'fixedCommand' function of 'PlatformUtils.java', where user-supplied input from cloud account configuration fields, such as region and proxy settings, is not properly validated or sanitized. This allows authenticated attackers to inject arbitrary commands that are executed with the application's privileges, leading to remote code execution. The vulnerability also exposes legitimate multi-cloud credentials for various cloud providers, including AWS, Azure, Aliyun, Huawei Cloud, Tencent Cloud, and Google Cloud Platform.

Impact

Exploitation of this vulnerability allows for arbitrary command execution on the server where HummerRisk is running. This not only leads to unauthorized actions being performed on the server but also allows for the exfiltration of legitimate cloud provider credentials, which can be used to access and manipulate resources across the victim's entire multi-cloud infrastructure. Such actions could include modifying or deleting critical data, disrupting cloud services, and even causing financial damage through unexpected cloud service charges.

Reproduction

The vulnerability can be reproduced by creating a cloud account in HummerRisk with malicious input in the region or proxy fields that includes command injection payloads. Once the account is set up, triggering a cloud compliance scan will execute the injected commands. This can be done using tools like 'curl' to send HTTP requests to the HummerRisk application, including the malicious payloads in the appropriate fields.

Remediation

It is recommended to implement strict input validation and whitelisting for all cloud configuration parameters to prevent command injection. Additionally, using 'ProcessBuilder' to handle command execution with proper environment variable management can mitigate the risk. Encrypting cloud credentials before storing them and integrating with cloud secret management services can further enhance security.