Full Report
Discover how to increase the coverage of your CodeQL CORS security by modeling developer headers and frameworks. The post Modeling CORS frameworks with CodeQL to find security vulnerabilities appeared first on The GitHub Blog.
Analysis Summary
# Modeling CORS frameworks with CodeQL to find security vulnerabilities
### Key Points
- The article discusses the importance of modeling CORS (Cross-Origin Resource Sharing) frameworks in CodeQL, a static analysis tool, to identify security vulnerabilities.
- Insecure usage of CORS frameworks and logic errors can lead to serious security vulnerabilities that allow attackers to bypass authentication and access services on the intranet.
- CodeQL can model developer headers and frameworks to find security-related header writes, such as `Access-Control-Allow-Origin` and `Access-Control-Allow-Credentials`.
- The article provides examples in Go, demonstrating how to use CodeQL to identify CORS misconfigurations and vulnerabilities.
## Threat Actors
- Not applicable in this context
## TTPs (Techniques Used)
- Modeling CORS frameworks using CodeQL
- Using specific header values to find simple examples of CORS
- Identifying security-related header writes with `HeaderWrite` class
- Extending `HTTP::HeaderWrite` class to model new APIs
## Affected Systems
- Web applications that use CORS frameworks and logic errors
- Specific technologies/platforms such as Go, Django, FastAPI, and Flask
## Mitigations
- Implementing secure CORS configurations using CodeQL
- Setting `Access-Control-Allow-Origin` and `Access-Control-Allow-Credentials` to specific values
- Using CodeQL to detect and suggest fixes for CORS misconfigurations
## Conclusion
Modeling CORS frameworks with CodeQL can help identify security vulnerabilities in web applications. By understanding how to model developer headers and frameworks, developers can use static analysis tools like CodeQL to find and fix security issues related to CORS configurations.