Fastjson 1.2.68 Remote Code Execution Vulnerability Scanner

Fastjson 1.2.68 is an iteration of the widely utilized Fastjson library for Java, designed for processing JSON data with high efficiency. Employed across numerous Java-based applications for JSON parsing, generation, and processing, this library is fundamental for web services and system-to-system data exchanges. Despite its broad adoption for its performance, version 1.2.68 harbors a critical remote code execution vulnerability that poses a significant risk to applications leveraging this library.

The remote code execution vulnerability present in Fastjson 1.2.68 allows attackers to execute arbitrary code on the server through the deserialization of specially crafted JSON data. By manipulating the JSON request sent to an application using this library version, attackers can exploit the system. The criticality of this vulnerability is underscored by its CVSS score of 10, denoting its potential for severe impact.

The exploitation mechanism involves the misuse of the @type attribute within a JSON payload to dictate a specific Java class for deserialization. For this version, specific classes can be targeted to trigger the vulnerability, enabling remote code execution via RMI or other remote execution methods. This flaw allows for the bypassing of security mechanisms, enabling unauthenticated remote code execution and potentially leading to complete system compromise.

Exploiting this vulnerability can lead to unauthorized system access, data breaches, and the potential for attackers to gain control over the system. The implications include the spread of malware, privilege escalation, and sensitive data exfiltration, compromising the affected system's confidentiality, integrity, and availability.

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