Headline
GHSA-jxgp-jgh3-8jc8: KubeOperator allows unauthorized access to system API
Summary
API interfaces with unauthorized access will leak sensitive information /api/v1/clusters/kubeconfig/<clusterName>
Details
Routes using v1 without any restrictions <img width="930" alt="image" src="https://user-images.githubusercontent.com/35884266/211258033-84aa14fb-01d5-459c-af81-e48b7552fabf.png">
Directly pass in downloadKubeconfig according to the cluster name
<img width="960" alt="image" src="https://user-images.githubusercontent.com/35884266/211258011-d885fda6-06c3-4603-be4a-38d9c9b918b4.png"> pkg/router/v1/white.go
no restrictions
func downloadKubeconfig(ctx context.Context) {
clusterName := ctx.Params().GetString("name")
ctx.Header("Content-Disposition", "attachment")
ctx.Header("filename", fmt.Sprintf("%s-config", clusterName))
ctx.Header("Content-Type", "application/download")
clusterService := service.NewClusterService()
str, err := clusterService.GetKubeconfig(clusterName)
if err != nil {
_, _ = ctx.JSON(err)
ctx.StatusCode(http.StatusInternalServerError)
}
_, _ = ctx.WriteString(str)
}
<img width="872" alt="image" src="https://user-images.githubusercontent.com/35884266/211258106-79204452-b0b8-4d02-b774-1c2b61dd6bf2.png">
Impact
This is an unauthorized access to the kubeconfig vulnerability, which can be used to take over the cluster under certain conditions
Summary
API interfaces with unauthorized access will leak sensitive information
/api/v1/clusters/kubeconfig/
Details
Routes using v1 without any restrictions
Directly pass in downloadKubeconfig according to the cluster name
pkg/router/v1/white.go
no restrictions
func downloadKubeconfig(ctx context.Context) { clusterName := ctx.Params().GetString(“name”) ctx.Header("Content-Disposition", “attachment”) ctx.Header("filename", fmt.Sprintf("%s-config", clusterName)) ctx.Header("Content-Type", “application/download”) clusterService := service.NewClusterService() str, err := clusterService.GetKubeconfig(clusterName) if err != nil { _, _ = ctx.JSON(err) ctx.StatusCode(http.StatusInternalServerError) } _, _ = ctx.WriteString(str) }
Impact
This is an unauthorized access to the kubeconfig vulnerability, which can be used to take over the cluster under certain conditions
References
- GHSA-jxgp-jgh3-8jc8
Related news
KubeOperator is an open source Kubernetes distribution focused on helping enterprises plan, deploy and operate production-level K8s clusters. In KubeOperator versions 3.16.3 and below, API interfaces with unauthorized entities and can leak sensitive information. This vulnerability could be used to take over the cluster under certain conditions. This issue has been patched in version 3.16.4.