mcp-server-semgrep/semgrep-rules/java/lang/security/audit/overly-permissive-file-permission.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: overly-permissive-file-permission
  message: >-
    Detected file permissions that are overly permissive (read, write, and execute).
    It is generally a bad practices to set overly permissive file permission such
    as read+write+exec for all users.
    If the file affected is a configuration, a binary, a script or sensitive data,
    it can lead to privilege escalation or information leakage.
    Instead, follow the principle of least privilege and give users only the 
    permissions they need.
  severity: WARNING
  languages: [java]
  metadata:
    cwe:
    - 'CWE-276: Incorrect Default Permissions'
    owasp:
    - A01:2021 - Broken Access Control
    source-rule-url: https://find-sec-bugs.github.io/bugs.htm#OVERLY_PERMISSIVE_FILE_PERMISSION
    category: security
    technology:
    - java
    references:
    - https://owasp.org/Top10/A01_2021-Broken_Access_Control
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  pattern-either:
  - pattern: java.nio.file.Files.setPosixFilePermissions($FILE, java.nio.file.attribute.PosixFilePermissions.fromString("=~/(^......r..$)|(^.......w.$)|(^........x$)/"));
  - pattern: |
      $TYPE $P = java.nio.file.attribute.PosixFilePermissions.fromString("=~/(^......r..$)|(^.......w.$)|(^........x$)/");
      ...
      java.nio.file.Files.setPosixFilePermissions($FILE, $P);
  - pattern: |
      $P.add(java.nio.file.attribute.PosixFilePermission.OTHERS_READ);
      ...
      java.nio.file.Files.setPosixFilePermissions($FILE, $P);
  - pattern: |
      $P.add(java.nio.file.attribute.PosixFilePermission.OTHERS_WRITE);
      ...
      java.nio.file.Files.setPosixFilePermissions($FILE, $P);
  - pattern: |-
      $P.add(java.nio.file.attribute.PosixFilePermission.OTHERS_EXECUTE);
      ...
      java.nio.file.Files.setPosixFilePermissions($FILE, $P);