Java Security Advance — Lesson 4: Secure Coding, Deserialization, Injection, Dependencies, Testing, and Response

Learning Objectives

• Explain the purpose and operating context of input validation, output encoding, SQL, command, path, and template injection.
• Apply serialization filters, gadget risks, object mapping, and untrusted data and dependency vulnerabilities, SBOM awareness, signing, and supply-chain controls in a controlled environment.
• Validate outcomes and troubleshoot risks involving SAST, DAST, fuzzing, security logging, incident evidence, and hardening backlog.

Detailed Topics

• input validation, output encoding, SQL, command, path, and template injection
• serialization filters, gadget risks, object mapping, and untrusted data
• dependency vulnerabilities, SBOM awareness, signing, and supply-chain controls
• SAST, DAST, fuzzing, security logging, incident evidence, and hardening backlog

Instructor Demonstration

Demonstrate input validation, output encoding, SQL, command, path, and template injection for a Java service hardened against credential theft, injection, insecure deserialization, token abuse, and cryptographic misuse; capture the exact configuration, code, command, transaction, query, dashboard, model, schedule, or report evidence that proves the expected result.

Hands-On Exercise

Complete a controlled Java Security Advance exercise covering serialization filters, gadget risks, object mapping, and untrusted data and dependency vulnerabilities, SBOM awareness, signing, and supply-chain controls; introduce an exception involving SAST, DAST, fuzzing, security logging, incident evidence, and hardening backlog, diagnose it from evidence, apply the smallest reversible correction, and rerun acceptance checks.

1. Confirm scope, prerequisites, identities, dependencies, data, risks, and expected outcome.
2. Perform the course-specific configuration, development, administration, analysis, or business-process workflow.
3. Capture commands, settings, records, logs, screenshots, reports, metrics, or test results.
4. Compare the observed result with acceptance criteria and document corrective or preventive action.

Scenario Analysis

• Identify the technical or business decision and the stakeholders affected by it.
• Compare security, performance, reliability, compliance, cost, usability, and support trade-offs.
• Define rollback, recovery, communication, evidence, ownership, and escalation requirements.

Troubleshooting Guidance

Diagnose issues involving input validation, output encoding, SQL, command, path, and template injection, serialization filters, gadget risks, object mapping, and untrusted data, dependency vulnerabilities, SBOM awareness, signing, and supply-chain controls, SAST, DAST, fuzzing, security logging, incident evidence, and hardening backlog without making an unverified production change. Separate symptoms from causes, gather time-correlated evidence, test a reversible hypothesis, validate the correction, and record recurrence controls.

Validation Checklist

• The requirement, environment, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by product-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, support actions, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Secure Coding, Deserialization, Injection, Dependencies, Testing, and Response in a realistic Java Security Advance scenario and defend the result with documented evidence.