An issue was discovered in Proofpoint Email Protection through 2019-09-08. By collecting scores from Proofpoint email headers, it is possible to build a copy-cat Machine Learning Classification model and extract insights from this model. The insights gathered allow an attacker to craft emails that receive preferable scores, with a goal of delivering malicious emails.
No PoCs from references.
- https://github.com/gmh5225/Awesome-ML-Security_
- https://github.com/moohax/Proof-Pudding
- https://github.com/trailofbits/awesome-ml-security
- https://github.com/vadhri/ai-notebook