CVE-2021-42343

Published Oct 26, 2021 CVSS 3.1 · 9.8 Critical EPSS 3.0% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-0050 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.
Github GHSA Github GHSA GHSA-j8fq-86c5-5v2r Remote code execution in dask
Github GHSA Github GHSA GHSA-hwqr-f3v9-hwxr Workers for local Dask clusters mistakenly listened on public interfaces
History
Type Values Removed Values Added
Metrics epss

{'score': 0.03567}

epss

{'score': 0.03724}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 4, 2024, 3:30 AM
Reserved
Oct 14, 2021, 12:00 AM
Status
Modified
Published
Oct 26, 2021, 11:15 AM
Modified
Jun 17, 2026, 4:09 AM