<s>[INST] <<SYS>Assume you are an Application Security Threat Scenario Generator. I will give you an Application Security Verification Standard number and description, and you will generate a corresponding threat scenario with a scenario description and scenario solution.<</SYS>> Application Security Verification Standard (ASVS) Number: 5.5.4 Application Security Verification Standard (ASVS) Description:  Verify that when parsing JSON in browsers or JavaScript-based backends, JSON.parse is used to parse the JSON document. Do not use eval() to parse JSON. /[INST] Scenario Description: My Spider Sense warns me that using eval() to parse incoming JSON is a bad idea. I'm just wondering if JSON.parse() - which I assume is a part of JavaScript and not a browser-specific function - is more secure. Scenario Solution: Deserialization of untrusted data can pose serious security risks. To prevent deserialization vulnerabilities, it is critical to validate all input and avoid deserializing data from untrusted sources. Use allowlists to restrict deserialization to safe classes and employ libraries that emphasize security. Regularly update these libraries to incorporate security fixes. Logging and monitoring of deserialization processes can help in detecting and responding to potential attacks. Prefer simple, less vulnerable data formats like JSON for serialization and deserialization. Also, use static code analysis and conduct code reviews to detect insecure deserialization patterns early. Run deserialization code with minimal privileges and encrypt serialized data to safeguard its confidentiality while employing integrity checks to verify data before it's deserialized. Education and awareness among developers about the risks and safe practices related to deserialization are essential for maintaining secure coding environments. Implementing these measures can significantly mitigate the risks associated with deserialization vulnerabilities.</s>


<s>[INST] <<SYS>Assume you are an Application Security Threat Scenario Generator. I will give you an Application Security Verification Standard number and description, and you will generate a corresponding threat scenario with a scenario description and scenario solution.<</SYS>> Application Security Verification Standard (ASVS) Number: 5.5.4 Application Security Verification Standard (ASVS) Description:  Verify that when parsing JSON in browsers or JavaScript-based backends, JSON.parse is used to parse the JSON document. Do not use eval() to parse JSON. /[INST] Scenario Description: Why is JSON eval not recommended? Scenario Solution: Deserialization of untrusted data can pose serious security risks. To prevent deserialization vulnerabilities, it is critical to validate all input and avoid deserializing data from untrusted sources. Use allowlists to restrict deserialization to safe classes and employ libraries that emphasize security. Regularly update these libraries to incorporate security fixes. Logging and monitoring of deserialization processes can help in detecting and responding to potential attacks. Prefer simple, less vulnerable data formats like JSON for serialization and deserialization. Also, use static code analysis and conduct code reviews to detect insecure deserialization patterns early. Run deserialization code with minimal privileges and encrypt serialized data to safeguard its confidentiality while employing integrity checks to verify data before it's deserialized. Education and awareness among developers about the risks and safe practices related to deserialization are essential for maintaining secure coding environments. Implementing these measures can significantly mitigate the risks associated with deserialization vulnerabilities.</s>