CWE-333 (TRNG不充分信息熵的处理不恰当) — Vulnerability Class 1

CWE-333 represents a critical weakness where software fails to adequately manage insufficient entropy within True Random Number Generators (TRNG). This vulnerability arises because TRNGs rely on physical phenomena to generate randomness, inherently limiting their output rate and availability. Attackers typically exploit this by inducing denial-of-service conditions or forcing the system to fall back to predictable pseudo-random number generators, thereby compromising cryptographic keys or session tokens. Developers mitigate this risk by implementing robust entropy pooling mechanisms that aggregate multiple entropy sources and by strictly reserving TRNG usage for high-security contexts where true randomness is indispensable. Additionally, integrating fallback strategies that maintain security even during entropy depletion ensures system resilience. By carefully monitoring entropy levels and avoiding unnecessary TRNG calls, engineers prevent resource exhaustion and maintain the integrity of security-sensitive operations against potential exploitation.