Kubernetes supports node proxying, which allows clients of kube-apiserver to access endpoints of a Kubelet to establish connections to Pods, retrieve container logs, and more. While Kubernetes already validates the proxying address for Nodes, a bug in kube-apiserver made it possible to bypass this validation. Bypassing this validation could allow authenticated requests destined for Nodes to be redirected to the API Server through its private network.

have two inputs we test [0, q) on one side and a set of interesting // values on the other side. func interestingValues() []interestingValue { if testing.Short() { return []interestingValue{{v: q - 1, m: minusOne}} } var values []interestingValue for _, v := range []uint32{ 0, 1, 2, 3, q - 3, q - 2, q - 1, q / 2, (q + 1) / 2, } { m, _ := fieldToMontgomery(v) values = append(values, interestingValue{v: v, m: m}) // Also test values that have an interesting Montgomery representation. values = append(values,...