upgrade to latest dependencies

bumping knative.dev/pkg df28fea...0c39ce4:
  > 0c39ce4 Allow to disable http2 for the webhook (# 2877)

Signed-off-by: Knative Automation <[email protected]>

go.mod

@@ -12,7 +12,7 @@ require (
 	k8s.io/kube-openapi v0.0.0-20220803162953-67bda5d908f1
 	knative.dev/hack v0.0.0-20230417170854-f591fea109b3
 	knative.dev/hack/schema v0.0.0-20230417170854-f591fea109b3
-	knative.dev/pkg v0.0.0-20231011201526-df28feae6d34
+	knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f
 )
 
 require (

go.sum

@@ -816,8 +816,8 @@ knative.dev/hack v0.0.0-20230417170854-f591fea109b3 h1:+W4WBOq83tfGXKhtv8OB/uJeY
 knative.dev/hack v0.0.0-20230417170854-f591fea109b3/go.mod h1:yk2OjGDsbEnQjfxdm0/HJKS2WqTLEFg/N6nUs6Rqx3Q=
 knative.dev/hack/schema v0.0.0-20230417170854-f591fea109b3 h1:TUHxKhNDLCX/XaqNaX9PY+247jEYD5aerg1woAhmEzw=
 knative.dev/hack/schema v0.0.0-20230417170854-f591fea109b3/go.mod h1:GeIb+PLd5mllawcpHEGF5J5fYTQrvgEO5liao8lUKUs=
-knative.dev/pkg v0.0.0-20231011201526-df28feae6d34 h1:H+K37bEBZ2STSWMjCgrdilj38KKZGVxBbob22K99Y50=
-knative.dev/pkg v0.0.0-20231011201526-df28feae6d34/go.mod h1:ZRgzFBFmdBsARm6+Pkr9WRG8bXys8rYq64ELfLG6+9w=
+knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f h1:XCH1qZqW1riR8cjhMGjewxQXlWPrfgxeUorBjpC6lE4=
+knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f/go.mod h1:ZRgzFBFmdBsARm6+Pkr9WRG8bXys8rYq64ELfLG6+9w=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

vendor/knative.dev/pkg/webhook/webhook.go

@@ -67,6 +67,17 @@ type Options struct {
 	// GracePeriod is how long to wait after failing readiness probes
 	// before shutting down.
 	GracePeriod time.Duration
+
+	// EnableHTTP2 enables HTTP2 for webhooks.
+	// Mitigate CVE-2023-44487 by disabling HTTP2 by default until the Go
+	// standard library and golang.org/x/net are fully fixed.
+	// Right now, it is possible for authenticated and unauthenticated users to
+	// hold open HTTP2 connections and consume huge amounts of memory.
+	// See:
+	// * https://github.com/kubernetes/kubernetes/pull/121120
+	// * https://github.com/kubernetes/kubernetes/issues/121197
+	// * https://github.com/golang/go/issues/63417#issuecomment-1758858612
+	EnableHTTP2 bool
 }
 
 // Operation is the verb being operated on
@@ -219,11 +230,18 @@ func (wh *Webhook) Run(stop <-chan struct{}) error {
 		QuietPeriod: wh.Options.GracePeriod,
 	}
 
+	// If TLSNextProto is not nil, HTTP/2 support is not enabled automatically.
+	nextProto := map[string]func(*http.Server, *tls.Conn, http.Handler){}
+	if wh.Options.EnableHTTP2 {
+		nextProto = nil
+	}
+
 	server := &http.Server{
 		Handler:           drainer,
 		Addr:              fmt.Sprint(":", wh.Options.Port),
 		TLSConfig:         wh.tlsConfig,
 		ReadHeaderTimeout: time.Minute, //https://medium.com/a-journey-with-go/go-understand-and-mitigate-slowloris-attack-711c1b1403f6
+		TLSNextProto:      nextProto,
 	}
 
 	eg, ctx := errgroup.WithContext(ctx)

vendor/modules.txt

@@ -823,7 +823,7 @@ knative.dev/hack/schema/commands
 knative.dev/hack/schema/docs
 knative.dev/hack/schema/registry
 knative.dev/hack/schema/schema
-# knative.dev/pkg v0.0.0-20231011201526-df28feae6d34
+# knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f
 ## explicit; go 1.18
 knative.dev/pkg/apis
 knative.dev/pkg/apis/duck