EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 6·5 min read
schrodingers-toctou: The binary you run is not the program you wrote
TL;DR
Compiler optimizations can alter your code in ways that make it behave differently across environments, potentially introducing security vulnerabilities. Understanding these changes is crucial for maintaining code integrity.
✦ Why It Matters
Review your compiler settings and test your code across different environments to ensure security.
Key Takeaways
- Understand how compiler optimizations can introduce vulnerabilities.
- Review code for potential TOCTOU issues, especially in security-critical areas.
- Use automated tools to detect hidden vulnerabilities in your codebase.
- Stay informed about compiler behavior and its impact on security.
How It Works
Compilers optimize code by reordering and combining operations, which can lead to unexpected behavior. For instance, a single read of a variable in source code may result in multiple reads in the compiled binary, creating a window for exploitation if the memory is modified between these reads.
This phenomenon is particularly dangerous in security checks, where an attacker can manipulate values between the check and their use.