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upgrade to latest dependencies (#988)
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bumping knative.dev/pkg df28fea...0c39ce4:
  > 0c39ce4 Allow to disable http2 for the webhook (# 2877)

Signed-off-by: Knative Automation <[email protected]>
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knative-automation authored Oct 23, 2023
1 parent 985fe8a commit ad544ca
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Showing 4 changed files with 22 additions and 4 deletions.
2 changes: 1 addition & 1 deletion go.mod
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Expand Up @@ -26,7 +26,7 @@ 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
sigs.k8s.io/yaml v1.3.0
)

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4 changes: 2 additions & 2 deletions go.sum
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Expand Up @@ -762,8 +762,8 @@ 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=
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18 changes: 18 additions & 0 deletions vendor/knative.dev/pkg/webhook/webhook.go
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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)
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2 changes: 1 addition & 1 deletion vendor/modules.txt
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Expand Up @@ -940,7 +940,7 @@ 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
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