AI Model Penetration: Testing LLMs for Prompt Injection & Jailbreaks

The video highlights the importance of rigorously testing large language models (LLMs) for vulnerabilities like prompt injections and jailbreaks using automated security methods such as SAST and DAST, drawing parallels to traditional software security practices. It emphasizes proactive measures including red teaming, independent reviews, sandbox testing, and real-time input filtering to ensure AI systems remain secure and trustworthy against evolving threats.

The video begins with an analogy of building an impenetrable fortress, highlighting how creators often struggle to objectively assess the security of their own creations. This is especially true in software development, where independent testing is crucial to identify vulnerabilities. The speaker draws a parallel to large language models (LLMs), emphasizing that these AI systems require similar scrutiny to uncover weaknesses such as prompt injections and jailbreaks, which exploit the language-based attack surface unique to AI applications.

Unlike traditional web applications with fixed input types and lengths, LLMs are vulnerable to attacks embedded within natural language prompts. Prompt injections can override the model’s instructions, potentially exposing confidential information or causing harmful actions. The video explains that AI models can also be “infected” through data poisoning or manipulated to perform unintended actions, known as excessive agency. Given the vast number of available models—many with billions of parameters—manual inspection is impractical, necessitating automated security testing approaches.

To address these challenges, the video introduces concepts borrowed from application security testing: Static Application Security Testing (SAST) and Dynamic Application Security Testing (DAST). SAST involves scanning the source code or model for known vulnerabilities, while DAST tests the live, executable model by running penetration tests against it. These methods help identify prohibited behaviors such as executing unauthorized code, performing input/output operations, or accessing networks, ensuring the model operates securely within its sandbox.

The video also demonstrates practical testing techniques for LLMs, such as injecting prompts designed to override instructions or using unconventional inputs like Morse code to bypass security measures. Automated tools can scan for over 25 classes of attacks, including prompt injections, jailbreaks, data exfiltration, and abusive language. Because of the complexity and volume of potential attacks, automated testing is essential to maintain the integrity and safety of AI deployments.

Finally, the speaker offers actionable advice for securing AI systems: conduct regular red teaming exercises to simulate attacks, involve independent reviewers, use sandbox environments for safe testing, and continuously monitor for emerging threats. Deploying AI gateways or proxies can provide real-time filtering of user inputs to block malicious prompts before they reach the model. The overarching message is clear—building trustworthy AI requires proactively breaking and testing it to avoid vulnerabilities, much like reinforcing a fortress against unseen threats.