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Daniel Sagi

Daniel was a security researcher at Aqua, focused on researching containerized environments.

Blog Posts by Daniel Sagi

Kube-hunter – an open source tool for Kubernetes penetration testing

Aqua released a free tool called kube-hunter to help with Kubernetes Security. You give it the IP or DNS name of your Kubernetes cluster, and kube-hunter probes for security issues – it’s like automated penetration testing.

CVE-2019-11246: Another kubectl Path Traversal Vulnerability Disclosed

A new vulnerability (CVE-2019-11246) was disclosed that enables path traversal in kubectl, the popular command line interface for running commands on Kubernetes clusters. What’s interesting about this CVE is that we’ve already seen two previous variations of the same vulnerability disclosed and patched. Read on to learn how that happened.

Kubernetes Pod Escape Using Log Mounts

Kubernetes has many moving parts, and sometimes combining them in certain ways can create unexpected security flaws. In this post you’ll see how a pod running as root and with a mount point to the node’s /var/log directory can expose the entire contents of its host filesystem to any user who has access to its …

DNS Spoofing on Kubernetes Clusters

In this post I’ll describe how an attacker, who manages to run malicious code on a cluster can, with no special permissive permissions, successfully spoof DNS responses to all the applications running on the cluster, and from there execute a MITM (Man In The Middle) on all network traffic of pods.

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