VNX-276 – Incorrect Default Permissions

Overview

VNX-276 maps to CWE-276: Incorrect Default Permissions. Detects source patterns associated with CWE-276 (Incorrect Default Permissions). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-276 | Languages: c, cpp, python

Why This Matters

This weakness class (Incorrect Default Permissions) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-276 and surfaces them for review. Each finding should be evaluated in context — the rule catches the pattern, not the context.

What Gets Flagged

// FLAGGED: contains 'open(' pattern
open(

// FLAGGED: contains '0o777' pattern
0o777

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-276 or a false positive.
  2. Replace the flagged construct with a documented safe alternative appropriate to your language and framework.
  3. For confirmed false positives, add a # vulnetix-ignore: VNX-276 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References