GHSA-v7hc-87jc-qrrr eventing-github vulnerable to denial of service caused by improper enforcement of the timeout on individual read operations

• Go knative.dev/eventing-github: < 0.39.1 → fixed in 0.39.1

Impact The eventing-github cluster-local server doesn't set `ReadHeaderTimeout`‬‭ which could lead do a DDoS‬ ‭attack, where a large group of users send requests to the server causing the server to hang‬ ‭for long enough to deny it from being available to other users, also know as a Slowloris‬ ‭attack. Patches Fix in `v1.12.1` and `v1.11.3` Credits The vulnerability was reported by Ada Logics during an ongoing security audit of Knative involving Ada Logics, the Knative maintainers, OSTIF and CNCF.