Versions of distributed
earlier than 2021.10.0
had a potential security vulnerability relating to single-machine Dask clusters.
Clusters started with dask.distributed.LocalCluster
or dask.distributed.Client()
(which defaults to using LocalCluster
) would mistakenly configure their respective Dask workers to listen on external interfaces (typically with a randomly selected high port) rather than only on localhost
. A Dask cluster created using this method AND running on a machine that has these ports exposed could be used by a sophisticated attacker to enable remote code execution. Users running on machines with standard firewalls in place, or using clusters created via cluster objects other than LocalCluster
(e.g. dask_kubernetes.KubeCluster
) should not be affected. This vulnerability is documented in CVE-2021-42343, and was fixed in version 2021.10.0
(PR #5427).
{ "nvd_published_at": null, "cwe_ids": [ "CWE-668" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2022-07-15T21:56:08Z" }