Evaluating Privilege Usage of Agents on Real-World Tools
This addresses security risks for users deploying LLM agents with tool access, though it is incremental as it builds on existing benchmarks.
The paper tackled the problem of evaluating LLM agents' security when using real-world tools with privileges, proposing GrantBox as a sandbox for analysis, and found that agents are vulnerable to sophisticated attacks with an average success rate of 84.80%.
Equipping LLM agents with real-world tools can substantially improve productivity. However, granting agents autonomy over tool use also transfers the associated privileges to both the agent and the underlying LLM. Improper privilege usage may lead to serious consequences, including information leakage and infrastructure damage. While several benchmarks have been built to study agents' security, they often rely on pre-coded tools and restricted interaction patterns. Such crafted environments differ substantially from the real-world, making it hard to assess agents' security capabilities in critical privilege control and usage. Therefore, we propose GrantBox, a security evaluation sandbox for analyzing agent privilege usage. GrantBox automatically integrates real-world tools and allows LLM agents to invoke genuine privileges, enabling the evaluation of privilege usage under prompt injection attacks. Our results indicate that while LLMs exhibit basic security awareness and can block some direct attacks, they remain vulnerable to more sophisticated attacks, resulting in an average attack success rate of 84.80% in carefully crafted scenarios.