Are security commit messages informative? Not enough!

The fast distribution and deployment of security patches are important to protect users against cyberattacks. These fixes can be detected automatically by patch management triage systems. However, previous work has shown that automating the task is not easy, in some cases, because of poor documentation or lack of information in security fixes. For many years, standard practices in the security community have steered engineers to provide cryptic commit messages (i.e., patch software vulnerabilities silently) to avoid potential attacks and reputation damage. However, not providing enough documentation on vulnerability fixes can hinder trust between vendors and users. Current efforts in the security community aim to increase the level of transparency during patch and disclosing times to help build trust in the development community and make patch management processes faster. In this paper, we evaluate how informative security commit messages (i.e., messages attached to security fixes) are and how different levels of information can affect different tasks in automated patch triage systems. We observed that security engineers, in general, do not provide enough detail to enable the three automated triage systems at the same time. In addition, results show that security commit messages need to be more informative-56.7% of the messages analyzed were documented poorly. Best practices to write informative and well-structured security commit messages (such as SECOM) should become a standard practice in the security community.