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CVE-2020-27352

Status Candidate

Overview

When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.

Related Files

Ubuntu Security Notice USN-4728-1
Posted Feb 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4728-1 - Gilad Reti discovered that snapd did not correctly specify cgroup delegation when generating systemd service units for various container management snaps. This could allow a local attacker to escalate privileges via access to arbitrary devices of the container host from within a compromised or malicious container.

tags | advisory, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2020-27352
SHA-256 | f62b67ef889b9ee520de0fe63f88fb82946d64b109047879e30516ab1bbfe140
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