Is CVE-2021-42343 in the CISA KEV catalog?

No. CVE-2021-42343 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42343?

CVE-2021-42343 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-42343?

CVE-2021-42343 has an EPSS score of 2.88% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42343?

Upgrade dask.distributed on debian 11 to 2021.01.0+ds.1-2.1+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2021-42343

CRITICALEPSS 85th pctl

9.8

CVSS v3

NVD

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.

How to fix

Remediation Available

dask.distributedDebian

Fixed in:2021.01.0+ds.1-2.1+deb11u1CVE-2021-42343

Fixed in:2021.09.1+ds.1-2CVE-2021-42343

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.88%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Vendor Advisory1

docs.dask.org

Third-Party Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.