Improper Use of Serialization Formats
Overview
Improper use of serialization formats occurs when data serialization and deserialization processes are handled insecurely, allowing untrusted or malicious data to be processed without adequate validation. This vulnerability arises from inadequate controls over the types of objects or data structures that can be serialized or deserialized, leading to potential execution of unintended code or data manipulation.
Why It Matters
- Security impact: Can lead to remote code execution, data tampering, or denial of service.
- Business risk: May result in data breaches, system compromise, and loss of customer trust.
- Common consequences: Unauthorized access, application crashes, and escalation of privileges.
Where It Appears
- Environments: Web applications, distributed systems, and APIs that exchange serialized data.
- Systems or processes: Data exchange mechanisms, session management, and inter-process communication.
- Typical conditions: Use of insecure or outdated serialization libraries and lack of input validation.
How It Is Exploited (High Level)
Attackers craft malicious serialized objects or data that, when deserialized by a vulnerable system, trigger unintended behaviors such as arbitrary code execution or manipulation of application logic. This exploitation leverages the trust the system places in serialized data without sufficient verification.
How It Is Addressed (High Level)
Mitigation involves implementing strict input validation, using safe serialization formats, enforcing allowlists for deserializable types, and applying secure coding practices to limit exposure to untrusted data. Additionally, isolating deserialization processes and employing runtime protections reduce risk.
Related Topics
Insecure deserialization, remote code execution, input validation, data integrity, secure coding practices.