Insecure Deserialization

Insecure deserialization vulnerabilities can lead to remote code execution or other types of attacks. Attackers can manipulate serialized objects to execute arbitrary code or access unauthorized functionalities.

# Vulnerable code
serializedData = request.getParameter("data")
data = deserialize(serializedData)
processData(data)

# Secure code (implement proper validation)
serializedData = request.getParameter("data")
data = validateAndDeserialize(serializedData)
processData(data)

serializedData = request.getParameter("data")
obj = deserialize(serializedData)

In this example, the deserialize function deserializes user-supplied data without proper validation or integrity checks. An attacker can provide manipulated serialized data containing malicious code, leading to remote code execution or unauthorized access to sensitive resources.

To mitigate this risk, only deserialize trusted data from secure sources, implement integrity checks on serialized data, and consider using whitelisting to restrict deserialization to known classes.