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.

A new vulnerability that impacts Alpine Docker images was published last week. The vulnerability is due to the ‘root’ user password which is set, by default, to NULL on Alpine Docker images from version 3.3 or higher.

Now that containers have been around for a few years and have had their share of disclosed vulnerabilities, it’s time to revisit some of the more interesting ones and see if there’s a recurring theme or any underlying trend to highlight.

A few days ago, Docker discovered that a database holding the credentials of some 190,000 Docker Hub accounts was exposed to unauthorized access (about 5% of all Docker Hub accounts). We’ve been getting questions from customers on this, so I wanted to set the record straight on what we know and what we recommend doing.

Recently, IBM researchers weighed in on container isolation, having developed an algorithm for measuring how well it works, and reached the conclusion that “a Docker container with a well crafted seccomp profile (which blocks unexpected system calls) provides roughly equivalent security to a hypervisor.“

A Stack Clash is a vulnerability in the memory management of several operating systems, including Linux. It can be exploited by attackers to corrupt memory of a privileged process in order to execute arbitrary code.