Discover and read the best of Twitter Threads about #kubernetessecurity
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How a simple web-app assessment lead to complete #AzureAd tenant takeover 🤯
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#Azure #AzureKubernetesService #aks #Kubernetes #KubernetesSecurity #k8s #bugbounty #bugbountytips #bugbountytip #DevSecOps
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#Azure #AzureKubernetesService #aks #Kubernetes #KubernetesSecurity #k8s #bugbounty #bugbountytips #bugbountytip #DevSecOps
1. Poorly-designed file upload functionality lead to RCE
2. Turned out the app was running in a container managed by #AzureKubernetesService (#AKS)
3. #Container was mounting a service account with permissions to deploy #pods in the same namespace
2. Turned out the app was running in a container managed by #AzureKubernetesService (#AKS)
3. #Container was mounting a service account with permissions to deploy #pods in the same namespace
4. I deployed a new pod with hostPath root volume. Deployment was not blocked by any security policy. #Pod got deployed
5. I exec-ed into the pod's #container and escaped it through its hostPath volume. #privesc to the #AKS node succeeded!
5. I exec-ed into the pod's #container and escaped it through its hostPath volume. #privesc to the #AKS node succeeded!
Mounting a #Kubernetes service account to a pod with permissions to deploy other pods implies that if your app has RCE, a threat actor will be able to infect other Services in the cluster (yes, even if you use strict PSPs) #KubernetesSecurity #k8s #aks #gke #eks
#DevSecOps
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#DevSecOps
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Background:
▪︎ A Service in #k8s is an object that balances HTTP requests between pods belonging to that Service
▪︎ A Service identifies its pods through a set of labels (e.g. "fancy-app: prod", "db: users", etc)
▪︎ A Service in #k8s is an object that balances HTTP requests between pods belonging to that Service
▪︎ A Service identifies its pods through a set of labels (e.g. "fancy-app: prod", "db: users", etc)
▪︎ A pod with a label associated with a Service will become part of that Service automatically
Attack scenario:
1. A pod is mounting a service account with permissions to deploy other pods
2. A container in the pod is running a vulnerable app, providing RCE to an attacker
Attack scenario:
1. A pod is mounting a service account with permissions to deploy other pods
2. A container in the pod is running a vulnerable app, providing RCE to an attacker
