[CVE-2023-44487] Disable http2 for webhooks #2871

skonto · 2023-10-20T15:10:10Z

Changes

Disables http2 by default for webhooks. Allows to set it on demand via options.
Similar to fix: disable HTTP2 connections by default prometheus-operator/prometheus-operator#6028.

Fixes # CVE-2023-44487 (partially)

Release Note

Due to CVE-2023-44487 webhooks will use http1 by default, until the issue is fixed properly.

knative-prow · 2023-10-20T15:10:13Z

@skonto: The label(s) kind/<kind> cannot be applied, because the repository doesn't have them.

In response to this:

Changes

Disables http2 by default for webhooks. Allows to to set it on demand via options.

Similar to fix: disable HTTP2 connections by default prometheus-operator/prometheus-operator#6028.

/kind

Fixes #

Release Note
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codecov · 2023-10-20T15:17:56Z

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (d6ab729) 81.88% compared to head (4269f48) 81.86%.
Report is 2 commits behind head on main.

❗ Current head 4269f48 differs from pull request most recent head 7af1062. Consider uploading reports for the commit 7af1062 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2871      +/-   ##
==========================================
- Coverage   81.88%   81.86%   -0.03%     
==========================================
  Files         167      167              
  Lines       10225    10230       +5     
==========================================
+ Hits         8373     8375       +2     
- Misses       1606     1608       +2     
- Partials      246      247       +1

Files	Coverage Δ
webhook/webhook.go	`82.16% <40.00%> (-1.39%)`	⬇️

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skonto · 2023-10-23T08:46:18Z

cc @dprotaso

dprotaso · 2023-10-23T13:57:23Z

webhook/webhook.go

@@ -245,12 +256,18 @@ func (wh *Webhook) Run(stop <-chan struct{}) error {
 		QuietPeriod: wh.Options.GracePeriod,
 	}

+	nextProto := map[string]func(*http.Server, *tls.Conn, http.Handler){}


can we add a comment that
// If TLSNextProto is not nil, HTTP/2 support is not enabled automatically.

dprotaso · 2023-10-23T14:03:22Z

/cherry-pick release-1.11

knative-prow-robot · 2023-10-23T14:03:23Z

@dprotaso: once the present PR merges, I will cherry-pick it on top of release-1.11 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.11

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dprotaso · 2023-10-23T14:03:26Z

/cherry-pick release-1.12

knative-prow-robot · 2023-10-23T14:03:27Z

@dprotaso: once the present PR merges, I will cherry-pick it on top of release-1.12 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.12

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dprotaso · 2023-10-23T14:06:29Z

/cherry-pick release-1.12

knative-prow-robot · 2023-10-23T14:06:31Z

@dprotaso: once the present PR merges, I will cherry-pick it on top of release-1.12 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.12

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dprotaso · 2023-10-23T14:30:01Z

/lgtm
/approve

knative-prow · 2023-10-23T14:30:08Z

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, skonto

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Needs approval from an approver in each of these files:

~~webhook/OWNERS~~ [dprotaso,skonto]

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knative-prow-robot · 2023-10-23T14:38:59Z

@dprotaso: new pull request created: #2875

In response to this:

/cherry-pick release-1.11

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knative-prow-robot · 2023-10-23T14:39:38Z

@dprotaso: new pull request created: #2876

In response to this:

/cherry-pick release-1.12

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dprotaso · 2023-10-23T15:01:16Z

/cherry-pick release-1.10

knative-prow-robot · 2023-10-23T15:01:52Z

@dprotaso: #2871 failed to apply on top of branch "release-1.10":

Applying: disable http2 for webhooks
Using index info to reconstruct a base tree...
M	webhook/webhook.go
Falling back to patching base and 3-way merge...
Auto-merging webhook/webhook.go
CONFLICT (content): Merge conflict in webhook/webhook.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 disable http2 for webhooks
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.10

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

disable http2 for webhooks

4269f48

knative-prow bot requested review from kauana and KauzClay October 20, 2023 15:10

skonto changed the title ~~[WIP] Disable http2 for webhooks~~ [WIP] [CVE-2023-44487] Disable http2 for webhooks Oct 20, 2023

skonto changed the title ~~[WIP] [CVE-2023-44487] Disable http2 for webhooks~~ [CVE-2023-44487] Disable http2 for webhooks Oct 23, 2023

knative-prow bot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Oct 23, 2023

dprotaso reviewed Oct 23, 2023

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7af1062

knative-prow bot assigned dprotaso Oct 23, 2023

knative-prow bot added the lgtm Indicates that a PR is ready to be merged. label Oct 23, 2023

knative-prow bot merged commit b8c14ce into knative:main Oct 23, 2023
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knative-prow-robot mentioned this pull request Oct 23, 2023

[release-1.11] [CVE-2023-44487] Disable http2 for webhooks #2875

Merged

knative-prow-robot mentioned this pull request Oct 23, 2023

[release-1.12] [CVE-2023-44487] Disable http2 for webhooks #2876

Merged

skonto mentioned this pull request Oct 23, 2023

[release-1.10] Allow to disable http2 for the webhook #2877

Merged

ReToCode mentioned this pull request Nov 1, 2023

Disable HTTP/2 for webhooks until a fix come #2881

Closed

jkandasa mentioned this pull request Nov 16, 2023

[v0.53.x] bump knative version to get a CVE fix tektoncd/pipeline#7372

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[CVE-2023-44487] Disable http2 for webhooks #2871

[CVE-2023-44487] Disable http2 for webhooks #2871

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[CVE-2023-44487] Disable http2 for webhooks #2871

[CVE-2023-44487] Disable http2 for webhooks #2871

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