PSA: Update your docker installation. Leaky Vessels flaws allow hackers to escape Docker, runc containers
PSA: Update your docker installation. Leaky Vessels flaws allow hackers to escape Docker, runc containers
Four vulnerabilities collectively called "Leaky Vessels" allow hackers to escape containers and access data on the underlying host operating system.
Snyk team has found four vulnerabilities collectively called "Leaky Vessels" that impact the runc and Buildkit container infrastructure and build tools, potentially allowing attackers to perform container escape on various software products.
On January 31, 2024, Buildkit fixed the flaws with version 0.12.5, and runc addressed the security issue impacting it on version 1.1.12.
Docker released version 4.27.0 on the same day, incorporating the secured versions of the components in its Moby engine, with versions 25.0.1 and 24.0.8.
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Don't run docker, so far it has proven quite insecure, and that was by design at first because docker was created for development environments and not for deployment.
Later docker added better security, because they understood the value in deployment too. But many distro are still insecure by default and it takes both the effort of sysadmins and image developers to deploy securely docker containers.
I switched to Podman: no daemon, no socket, no root operations out of the box. And the transition is basically seamless too.
I believe podman and containerd use
runcunder the hood so they're also affected by this container escape vulnerability. You should update it to the latest version.Podman can use different tools under the hood, will check which one I am using.
I think on redhat/fedora it uses runc by default and on debian/arch it uses crun by default.