Tekton Pipelines git resolver has path traversal that allows reading arbitrary files from the resolver pod

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Starting in version 1.0.0 and prior to versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2, the Tekton Pipelines git resolver is vulnerable to path traversal via the `pathInRepo` parameter. A tenant with permission to create `ResolutionRequests` (e.g. by creating `TaskRuns` or `PipelineRuns` that use the git resolver) can read arbitrary files from the resolver pod's filesystem, including ServiceAccount tokens. The file contents are returned base64-encoded in `resolutionrequest.status.data`. Versions 1.0.1, 1.3.3, 1.6.1, 1.9.2, and 1.10.2 contain a patch.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

对路径名的限制不恰当(路径遍历)

Tekton Pipelines 路径遍历漏洞

Tekton Pipelines是Tekton开源的一个云原生管道。 Tekton Pipelines 1.0.1之前版本、1.3.3之前版本、1.6.1之前版本、1.9.2之前版本和1.10.2之前版本存在路径遍历漏洞，该漏洞源于git解析器存在路径遍历问题，可能导致读取解析器Pod文件系统中的任意文件。

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