GHSA-hwqr-f3v9-hwxr
Workers for local Dask clusters mistakenly listened on public interfaces
Quick fix
GHSA-hwqr-f3v9-hwxr — distributed: upgrade to the fixed version with the command below.
pip install --upgrade 'distributed>=2021.10.0'Details
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).
Are you affected?
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Affected packages
0Fixed in: 2021.10.0pip install --upgrade 'distributed>=2021.10.0'References
- https://github.com/dask/distributed/security/advisories/GHSA-hwqr-f3v9-hwxr[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2021-42343[ADVISORY]
- https://github.com/dask/distributed/pull/5427[WEB]
- https://github.com/dask/distributed/commit/afce4be8e05fb180e50a9d9e38465f1a82295e1b[WEB]
- https://docs.dask.org/en/latest/changelog.html[WEB]
- https://github.com/dask/dask/tags[WEB]
- https://github.com/dask/distributed[PACKAGE]
- https://github.com/pypa/advisory-database/tree/main/vulns/distributed/PYSEC-2021-871.yaml[WEB]
- https://github.com/pypa/advisory-database/tree/main/vulns/distributed/PYSEC-2021-872.yaml[WEB]