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CVE-2021-42343

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Date: October 26, 2021

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.

Language: Python

Severity Score

Related Resources (9)

https://github.com/dask/dask/tags
https://nvd.nist.gov/vuln/detail/CVE-2021-42343
https://github.com/dask/distributed/security/advisories/GHSA-hwqr-f3v9-hwxr
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-42343
https://security.alpinelinux.org/vuln/CVE-2021-42343
https://github.com/dask/dask/releases
https://docs.dask.org/en/latest/changelog.html
https://security-tracker.debian.org/tracker/CVE-2021-42343
https://www.mend.io/vulnerability-database/CVE-2021-42343

Severity Score

Weakness Type (CWE)

Exposure of Resource to Wrong Sphere

CWE-668

Top Fix

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Upgrade Version

Upgrade to version dask - 2021.10.1,distributed - 2021.10.1

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV):
Access Complexity (AC):
Authentication (AU):
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW
Additional information:

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