API

Avoid unsafe deserialization

Docs > Code Analysis > Static Analysis Rules > Avoid unsafe deserialization

Metadata

ID: java-security/json-unsafe-deserialization

Language: Java

Severity: Error

Category: Security

CWE: 502

Description

Deserialization of untrusted data can lead to undesired code execution. Use activateDefaultTyping to prevent deserialization into random classes.

Learn More

ObjectMapper JavaDoc

Non-Compliant Code Examples

class Main {
    public static void main(String[] args) {
        ObjectMapper mapper = new ObjectMapper();
        oneFunction();
        oneFunction();
        mapper.readValue(json, ABean.class);
        foo.var();
        anotherFunction();
    }
}

Compliant Code Examples

class Main {
    public static void main(String[] args) {
        ObjectMapper mapper = new ObjectMapper();
        oneFunction();
        mapper.enableDefaultTyping();
        anotherFunction();
        mapper.readValue(json, ABean.class);
    }
}

How to use this rule

1
2
rulesets:
  - java-security     # Rules to enforce Java security.

Create a static-analysis.datadog.yml with the content above at the root of your repository
Use our free IDE Plugins or add Code Analysis scans to your CI pipelines
Get feedback on your code

For more information, please read the Code Analysis documentation

VS Code Extension

Identify code vulnerabilities directly in your
VS Code editor

JetBrains Plugin

Identify code vulnerabilities directly in
JetBrains products