CWE-276 (缺省权限不正确) — Vulnerability Class 456

CWE-276 represents a critical configuration weakness where software installation processes assign overly permissive access rights to files, often granting read, write, and execute privileges to all users. This flaw typically allows malicious actors to modify or replace critical application binaries, configuration files, or scripts without authentication. By altering these unprotected resources, attackers can inject malicious code, escalate privileges, or compromise system integrity, effectively bypassing security controls that rely on file integrity. To mitigate this risk, developers must adhere to the principle of least privilege during deployment. This involves explicitly setting restrictive permissions, such as read-only access for general users and write access only for administrators. Automated installation scripts should verify and enforce these secure defaults, ensuring that sensitive files remain immutable to unauthorized entities and preserving the overall security posture of the deployed environment.