CVE-2021-42694

This script implements a Homoglyph detection tool, primarily used to detect potential CVE-2021-42694 vulnerabilities in code. Let me explain its main functions in detail: Core Features:

• Detect homoglyph substitution attacks in code
• Scan identifiers such as variable names and function names in Python files
• Identify visually similar but different Unicode characters Main Components:
• HomoglyphDetector class: The main detector class
• Data Acquisition: Fetch Confusables data from the Unicode official website
• File Scanning: Support scanning single files or entire directories Workflow:
• Automatically download Unicode Confusables data on first run
• Parse the data and build a homoglyph comparison table
• Scan identifiers in code files
• Check each identifier for homoglyph characters
• Generate a detailed detection report Specific Detection Process: Apply to homoglyph_de...

  例如检测这样的代码：

  user_name = "John" # 正常代码 usеr_name = "John" # 包含同形文字的代码（е 是西里尔字母） Output Results:
• Display suspicious file paths
• Display suspicious identifiers
• Display specific homoglyph pairs (e.g., n -> η) Security Features:
• Automatic update of Unicode data
• Local caching mechanism
• Detailed error handling The main purpose of this tool is to help developers discover potential homoglyph attacks in code, which can lead to:
• Code obfuscation
• Security vulnerabilities
• Maintenance difficulties
• Potential malicious code injection By using this tool, developers can:
• Ensure that identifiers used in the code are safe
• Prevent homoglyph substitution attacks
• Improve code maintainability and security