upgrade to latest dependencies

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

Signed-off-by: Knative Automation <automation@knative.team>

go.mod

@@ -27,7 +27,7 @@ require (
 	knative.dev/control-protocol v0.0.0-20230420145039-d9cda76c5b03
 	knative.dev/hack v0.0.0-20230417170854-f591fea109b3
 	knative.dev/networking v0.0.0-20231012063223-0b0f2107abef
-	knative.dev/pkg v0.0.0-20231011201526-df28feae6d34
+	knative.dev/pkg v0.0.0-20231023160942-0c39ce4b3a7f
 )
 
 require (

go.sum

@@ -917,8 +917,8 @@ 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/networking v0.0.0-20231012063223-0b0f2107abef h1:FSEKaGc2ztb65VPn4EiTsjAFsmmHlYHUq+j+CCPlDtU=
 knative.dev/networking v0.0.0-20231012063223-0b0f2107abef/go.mod h1:rMVkShVT/14rtscYC4ZfC0hXghOXqj3EheFUDKYEqns=
-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

@@ -1008,7 +1008,7 @@ knative.dev/networking/test/test_images/runtime/handlers
 knative.dev/networking/test/test_images/timeout
 knative.dev/networking/test/test_images/wsserver
 knative.dev/networking/test/types
-# 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