Source: cna@vuldb.com
A security vulnerability has been detected in HummerRisk up to 1.5.0. Affected by this issue is some unknown functionality of the file ResourceCreateService.java of the component Cloud Task Scheduler. Such manipulation of the argument regionId leads to command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
HummerRisk up to version 1.5.0 is vulnerable to a critical command injection vulnerability. Attackers can remotely execute arbitrary commands on the server by manipulating the regionId argument within the ResourceCreateService.java file, potentially leading to complete system compromise. The vendor has not responded to the vulnerability disclosure, increasing the risk of widespread exploitation.
Step 1: Payload Delivery: The attacker crafts a malicious regionId value containing shell commands, designed to be injected into the command executed by ResourceCreateService.java.
Step 2: Request Submission: The attacker sends a specially crafted request, likely via HTTP, to the HummerRisk application, including the malicious regionId value.
Step 3: Vulnerable Code Execution: The ResourceCreateService.java file processes the request and, due to the lack of input validation, incorporates the attacker-controlled regionId directly into a system command.
Step 4: Command Execution: The system executes the crafted command, including the attacker-supplied malicious payload. This could involve creating new users, downloading malware, or exfiltrating sensitive data.
Step 5: System Compromise: The attacker gains control of the server, achieving their objectives, such as data theft, system disruption, or further lateral movement within the network.
The vulnerability stems from improper input validation and sanitization within the ResourceCreateService.java file, specifically when handling the regionId parameter. The code likely constructs a command using the provided regionId without adequately escaping or filtering potentially malicious characters. This allows an attacker to inject shell commands into the constructed command string, leading to arbitrary code execution on the server. The root cause is a failure to implement secure coding practices, such as input validation and output encoding, when processing user-supplied data. This lack of proper sanitization allows for command injection attacks, enabling attackers to execute malicious commands with the privileges of the HummerRisk application.
While no specific APTs are directly linked in this limited information, the public disclosure and availability of a PoC make this vulnerability attractive to a wide range of attackers, including those seeking initial access or lateral movement. The lack of vendor response suggests a high likelihood of exploitation. CISA KEV status: Not Applicable (as of this information).
Network traffic analysis: Monitor for unusual HTTP requests to the HummerRisk application, particularly those containing suspicious characters or command injection attempts in the regionId parameter.
Web Application Firewall (WAF) logs: Review WAF logs for blocked requests that match command injection signatures or patterns.
System logs: Examine system logs (e.g., application server logs, operating system logs) for evidence of command execution, such as unexpected processes spawning or unusual file modifications.
File integrity monitoring: Implement file integrity monitoring to detect unauthorized changes to critical system files, including those related to the HummerRisk application.
Intrusion Detection System (IDS) alerts: Configure IDS rules to detect command injection attempts based on known attack patterns.
Input Validation: Implement robust input validation and sanitization for the regionId parameter within ResourceCreateService.java. This includes whitelisting allowed characters, escaping special characters, and limiting the length of the input.
Output Encoding: Encode the output of the regionId parameter to prevent command injection vulnerabilities.
Least Privilege: Run the HummerRisk application with the least privileges necessary to perform its functions. This limits the potential impact of a successful exploit.
Web Application Firewall (WAF): Deploy a WAF to filter malicious requests and block command injection attempts.
Regular Security Audits: Conduct regular security audits and penetration testing to identify and address vulnerabilities.
Patching: If a patch becomes available, apply it immediately. Since the vendor has not responded, consider alternative solutions like a WAF or input validation.
Code Review: Perform a thorough code review of the ResourceCreateService.java file and any other code that handles user-supplied input.