C and C++ Security Checklist - New Testing Handbook Chapter
Low severity — routine development or informational update
Basically, a new guide helps developers find bugs in C and C++ code.
A new chapter in the Testing Handbook introduces a security checklist for C and C++ code. It covers common bugs and platform-specific issues, enhancing manual review processes. Developers can also test their skills with challenges for a chance to win prizes.
What Happened
A new chapter has been added to the Testing Handbook, focusing on a comprehensive security checklist for C and C++ code. This chapter addresses a wide range of common bug classes, known footguns, and API gotchas found in C and C++ codebases. It is organized into sections that cover Linux, Windows, and seccomp, providing a structured approach to manual code reviews.
Key Features of the Chapter
The chapter is divided into five main areas:
- General Bug Classes: This section discusses language-level issues such as memory safety, integer errors, and type confusion.
- Linux Usermode and Kernel: It focuses on libc gotchas and other common issues applicable to most POSIX systems.
- Windows Usermode and Kernel: This section covers vulnerabilities like DLL planting and unquoted path vulnerabilities.
- Seccomp/BPF Sandboxes: It highlights sandbox bypasses and security issues related to Linux seccomp and BPF features.
Why This Matters
The chapter not only provides a checklist for manual reviews but also serves as a foundation for developing a Claude skill that will turn the checklist into bug-finding prompts for LLMs. This integration aims to enhance the security review process by making it more efficient and effective.
Challenges to Test Your Skills
To engage readers, the chapter includes two challenges based on real bug classes from the checklist. Participants can test their review skills and compete for Trail of Bits swag by submitting correct answers before the deadline.
Continuous Improvement
The authors emphasize that this chapter is part of an ongoing effort to update the handbook. They encourage contributions from the community to ensure it remains a valuable resource for security practitioners and developers involved in source code security reviews. The checklist is a starting point for manual reviews, not a replacement for deep expertise.
If you need assistance securing your C/C++ systems, the authors invite you to reach out for support.
🔒 Pro insight: This checklist not only aids manual reviews but also leverages LLMs for automated bug detection, enhancing overall code security.