Looking back on the GitHub Security Lab Capture The Flag: CodeQL and chill

Semmle's security research team, now part of GitHub, has been organizing innovative Capture the Flag (CTF) events to advance their mission of securing open source software at scale. Unlike traditional CTFs, these events require participants to use CodeQL to identify and address vulnerabilities, such as a remote code execution flaw in a container management platform, by tracking data flow and exposing vulnerable patterns. The recent "CodeQL and chill – The Java edition" CTF emphasized learning and practical application over mere competition, with participants like Kanav Gupta and Nguyen Jang excelling in their understanding and execution. The event highlighted CodeQL's capability to analyze code as data, enabling the detection of entire classes of vulnerabilities and aligning with security practices akin to digital forensics. The GitHub Security Lab continues to encourage open-source security engagement, inviting participants to future CTFs and offering resources for organizations and teams.