CVE-2021-42343

Advisory

Dask 2021.10.0 includes a fix for CVE-2021-42343: An issue was discovered in the Dask distributed package before 2021.10.0 for Python. Single machine Dask clusters starting 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 (when running on a machine that has an applicable port exposed) could be used by a sophisticated attacker to achieve remote code execution.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

An issue was discovered in Dask (aka python-dask) through 2021.09.1. Single machine Dask 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 (when running on a machine that has an applicable port exposed) could be used by a sophisticated attacker to achieve remote code execution. See CVE-2021-42343.


MISC:https://docs.dask.org/en/latest/changelog.html: https://docs.dask.org/en/latest/changelog.html
MISC:https://github.com/dask/dask/releases: https://github.com/dask/dask/releases

Resources

• https://docs.dask.org/en/latest/changelog.html
• https://github.com/dask/dask/releases
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42343
• https://github.com/dask/dask/tags
• https://github.com/dask/distributed/security/advisories/GHSA-hwqr-f3v9-hwxr