9.8

CVE-2021-42343: anaconda dask

Modified
AliasesGHSA-hwqr-f3v9-hwxrGHSA-j8fq-86c5-5v2rPYSEC-2021-387
Published 26-10-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-42343 is a critical (CVSS 9.8) vulnerability in anaconda dask. EPSS estimates a 2.98% chance of exploitation in the next 30 days, higher than 87.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.98%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 26-10-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 4 sources · 3 versions

EPSS trend

Probability

2.98%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 3.00% on 23-09-2026

23-09-202623-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

PyPI2 products
  • dask< 2021.10.0
  • distributed< 2021.10.0
Anaconda1 product
Debian1 product
  • dask.distributed< 2021.09.1+ds.1-2
Opensuse1 product
  • python-distributed&distro=openSUSE Tumbleweed< 2024.4.2-1.1 | < 2026.6.0-1.1 | < 2022.1.0-1.1
Ubuntu1 product
  • dask.distributedAll versions (No fix recorded)

5 vendors · 6 products

References

16 links
Show all 16 references