full diff: https://github.com/containerd/containerd/compare/v1.2.11...v1.2.12

Welcome to the v1.2.12 release of containerd!

The twelfth patch release for containerd 1.2 includes an updated runc with
a fix for CVE-2019-19921, an updated version of the opencontainers/selinux
dependency, which includes a fix for CVE-2019-16884, an updated version of the
gopkg.in/yaml.v2 dependency to address CVE-2019-11253, and a Golang update.

Notable Updates

- Update the runc vendor to v1.0.0-rc10 which includes a mitigation for CVE-2019-19921.
- Update the opencontainers/selinux which includes a mitigation for CVE-2019-16884.
- Update Golang runtime to 1.12.16, mitigating the CVE-2020-0601 certificate verification
bypass on Windows, and CVE-2020-7919, which only affects 32-bit architectures.
- Update Golang runtime to 1.12.15, which includes a fix to the runtime (Go 1.12.14,
Go 1.12.15) and and the net/http package (Go 1.12.15)
- A fix to prevent SIGSEGV when starting containerd-shim containerd/containerd#3960
- Fixes to exec containerd/containerd#3755
- Prevent docker exec hanging if an earlier docker exec left a zombie process
- Prevent High system load/CPU utilization with liveness and readiness probes
- Prevent Docker healthcheck causing high CPU utilization

CRI fixes:

- Update the gopkg.in/yaml.v2 vendor to v2.2.8 with a mitigation for CVE-2019-11253

API

- Fix API filters to properly handle and return parse errors containerd/containerd#3950

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>