In association with the release of curl 8.4.0, we publish a security advisory and all the details for CVE-2023-38545. This problem is the worst security problem found in curl in a long time. We set it to severity HIGH.
While the advisory contains all the necessary details. I figured I would use a few additional words and expand the explanations for anyone who cares to understand how this flaw works and how it happened.
The argument for rust is memory safety, which allows you to avoid these very common, often serious, issues.
It’s an argument that goes far beyond curl, and some random curl clone written in rust.