Serverless Security - OWASP Top 10

What is Serverless Security?

Serverless security involves the practices and tools used to secure applications that run on a serverless architecture. This includes managing access controls, ensuring data privacy, and protecting against threats specific to serverless environments.

Key Terms

• Function as a Service (FaaS)
• Event-driven architecture
• Microservices
• API Gateway

Vulnerabilities in Serverless Applications

• Insecure APIs: APIs that are not properly secured can lead to unauthorized access.
• Excessive Permissions: Functions with too many permissions can create security risks.
• Data Exposure: Sensitive data can be exposed if not properly protected.
• Injection Attacks: Serverless applications may be vulnerable to various types of injection attacks.

Implementing Serverless Security

• Use the principle of least privilege for permissions.
• Regularly audit and monitor API access logs.
• Secure sensitive data with encryption at rest and in transit.
• Utilize a Web Application Firewall (WAF) to protect against common threats.

Sample Code for AWS Lambda Security Best Practices

const AWS = require('aws-sdk');
const lambda = new AWS.Lambda();

exports.handler = async (event) => {
    // Ensure permissions are scoped down to what's necessary
    const params = {
        FunctionName: 'myLambdaFunction',
        Payload: JSON.stringify(event)
    };
    try {
        const data = await lambda.invoke(params).promise();
        return JSON.parse(data.Payload);
    } catch (error) {
        console.error("Error invoking Lambda Function: ", error);
        throw error;
    }
};