CWE-782 (无充分访问控制条件下暴露IOCTL) — Vulnerability Class 18

CWE-782 represents a critical access control weakness where an operating system’s ioctl interface exposes privileged functionality without enforcing proper permission checks. This vulnerability typically arises when developers expose internal device drivers or system commands to user-space applications, assuming that only trusted processes will invoke them. Attackers exploit this by directly calling the unrestricted ioctl command, potentially gaining unauthorized root-level access, bypassing security boundaries, or executing arbitrary code with elevated privileges. To mitigate this risk, developers must rigorously implement access control lists and verify user credentials before processing any ioctl request. Additionally, minimizing the attack surface by removing unnecessary ioctl commands and applying the principle of least privilege ensures that only authorized entities can interact with sensitive system functions, thereby preventing exploitation by malicious actors.