Vulnerability Details : CVE-2021-42343
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.
Vulnerability category: Execute code
Exploit prediction scoring system (EPSS) score for CVE-2021-42343
Probability of exploitation activity in the next 30 days: 1.66%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 86 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-42343
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
nvd@nist.gov |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
nvd@nist.gov |
References for CVE-2021-42343
-
https://github.com/dask/distributed/security/advisories/GHSA-hwqr-f3v9-hwxr
Workers for local Dask clusters mistakenly listened on public interfaces · Advisory · dask/distributed · GitHubThird Party Advisory
-
https://docs.dask.org/en/latest/changelog.html
Changelog — Dask documentationRelease Notes;Vendor Advisory
-
https://github.com/dask/dask/tags
Tags · dask/dask · GitHubThird Party Advisory
Products affected by CVE-2021-42343
- cpe:2.3:a:anaconda:dask:*:*:*:*:*:python:*:*