CWE-391 (未经检查的错误条件) — Vulnerability Class 23

CWE-391 represents a critical software weakness where developers fail to properly handle or verify error conditions, such as ignored exceptions or unchecked return values. This oversight allows attackers to induce unexpected application behavior without detection, potentially leading to denial of service, data corruption, or further exploitation. By neglecting to validate the outcome of critical operations, systems remain vulnerable to state manipulation or resource exhaustion. To mitigate this risk, developers must implement robust error handling strategies that explicitly check for failures and respond appropriately. This includes validating function return codes, catching specific exceptions, and ensuring that security-sensitive operations are verified before proceeding. Adhering to these practices ensures that errors are logged, reported, or handled securely, preventing attackers from exploiting silent failures to compromise system integrity or availability.