Store and validate TaskRun/Run UIDs in pipeline task embedded status

[vdemeester]

Changes

See GHSA-w2h3-vvvq-3m53

This will ensure that scenarios like described in the linked advisory
cannot occur - we'll read the TaskRun/Run UID when we initially
add it to the embedded status, and if we ever encounter a
TaskRun/Run with the same name but a different UID in the future,
we'll throw an error.

Signed-off-by: Vincent Demeester vdemeest@redhat.com

/cc @abayer @wlynch @tektoncd/core-maintainers

/kind bug
/area security

Submitter Checklist

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Release Notes

Fix CVE-2023-37264: the controller now validates `TaskRun` and `CustomRun` UID to make sure we only accept `TaskRun`s and `Run`s that have the matching UID.

[tekton-robot]

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[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	95.7%	95.8%	0.0
pkg/reconciler/pipelinerun/pipelinerun.go	91.8%	91.8%	0.1
pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go	96.7%	96.1%	-0.6

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	95.7%	95.8%	0.0
pkg/reconciler/pipelinerun/pipelinerun.go	91.8%	91.8%	0.1
pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go	96.7%	96.1%	-0.6

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	95.7%	95.8%	0.0
pkg/reconciler/pipelinerun/pipelinerun.go	91.8%	91.8%	0.1
pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go	96.7%	96.1%	-0.6

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/apis/pipeline/v1beta1/pipelinerun_conversion.go	95.7%	95.8%	0.0
pkg/reconciler/pipelinerun/pipelinerun.go	91.8%	91.8%	0.1
pkg/reconciler/pipelinerun/resources/pipelinerunresolution.go	96.7%	96.1%	-0.6

[piyush-garg]

lgtm

[afrittoli]

Thanks @vdemeester for looking into this.
If someone can create a TaskRun in the cluster, they are likely able to edit the PipelineRun status as well and inject the TaskRun there.

This helps but we will have to let the Tekton controller sign *Run resources everytime there is an update to ensure that there was no tampering. If I'm not mistaken, we have the Spiffe/Spire integration almost finished to provide that capabilities.

[vdemeester]

If I'm not mistaken, we have the Spiffe/Spire integration almost finished to provide that capabilities.

Yes, but it's not going to be enabled by default.

[tekton-robot]

@vdemeester: PR needs rebase.

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[bobcatfish]

random drive by nit: typo 😜 ❤️