CVE-2024-42323 Scanner

Apache HertzBeat is a real-time open-source monitoring software widely used by IT administrators and software developers to monitor and alert various system metrics and network statuses. It is designed to track changes in server performance and user experience, thereby aiding businesses in maintaining system health and improving reliability. The application integrates with various databases and network services, offering dashboards and alerts for streamlined monitoring. As a hosted service, it can be deployed in local data centers or on cloud platforms, providing flexibility for different use cases. The software often finds its use in large enterprises and small businesses alike for monitoring server uptime, load times, and resource consumption. With its ease of deployment and user-friendly interface, Apache HertzBeat has become a preferred tool for enterprises aiming to enhance their IT infrastructure monitoring capabilities.

Remote Code Execution (RCE) is a severe vulnerability allowing attackers to execute arbitrary code on a target machine or in this context, within the server hosting the application. This vulnerability often results from improper input validation where the application processes untrusted user input leading to execution of malicious payloads. Attackers exploiting this vulnerability can gain unauthorized access to system resources, inject malicious scripts, or alter application behavior. RCE vulnerabilities are severe because they provide high-risk intrusion points on the server, enabling potential control over the target system. Once exploited, this vulnerability can lead to unauthorized access, data breaches, and potential further exploitation of the underlying infrastructure. Such vulnerabilities underscore the critical need for robust input validation and secure coding practices.

The technical details involve the exploitation of Apache HertzBeat versions prior to 1.6.0 using the SnakeYAML library, where vulnerable points are the `/api/monitors/import` and `/api/alert/defines/import` endpoints. An attacker needs authenticated access to submit malicious YAML files to these endpoints. The deserialization vulnerability in the SnakeYAML library is leveraged by creating a crafted `org.h2.jdbc.JdbcConnection` with a malicious H2 in-memory JDBC URL. The initiation block of the URL contains embedded Java code that gets executed, achieving RCE on the HertzBeat server's JVM. The presence of default credentials `admin:hertzbeat` and their usage in the Apache Docker image exacerbates the vulnerability by enabling unauthenticated users potential access in its default state. Successful exploitation allows attackers arbitrary command execution, potentially compromising the entire application server.

If exploited, the RCE vulnerability could lead to significant negative impacts. Once attackers achieve RCE, they may perform unauthorized data access, data manipulation, or even data theft, potentially leading to information breaches. It could also allow malicious entities to execute further exploitations, potentially gaining elevated privileges, resulting in complete server control. The application server might be used as a pivoting point for further attacks within a corporate network, endangering interconnected systems. Additionally, the system's reliability might be compromised, causing disruptions in business operations, financial losses, and damage to the organization's reputation. Unauthorized alteration of server configurations or scripts also increases the likelihood of service unavailability or degraded performance.

REFERENCES

• https://lists.apache.org/thread/dwpwm572sbwon1mknlwhkpbom2y7skbx
• https://nvd.nist.gov/vuln/detail/CVE-2024-42323