CVE-2021-42343

CRITICAL

Dask distributed < 2021.10.0 - Remote Code Execution via External Interface Exposure

Title source: llm
STIX 2.1

Description

An issue was discovered in the Dask distributed package before 2021.10.0 for Python. 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.

References (3)

Core 3
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://docs.dask.org/en/latest/changelog.html
Third Party Advisory x_refsource_misc
https://github.com/dask/dask/tags

Scores

CVSS v3 9.8
EPSS 0.0288
EPSS Percentile 85.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (2)
anaconda/dask < 2021.10.0
pypi/distributed 0 - 2021.10.0PyPI
Published Oct 26, 2021
Tracked Since Feb 18, 2026