Bug 2018587 (CVE-2021-42343) - CVE-2021-42343 python-dask: workers listen on external interfaces rather than only localhost
Summary: CVE-2021-42343 python-dask: workers listen on external interfaces rather than...
Alias: CVE-2021-42343
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2018588
TreeView+ depends on / blocked
Reported: 2021-10-29 18:31 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-29 20:08 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-10-29 20:08:12 UTC

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2021-10-29 18:31:28 UTC
An issue was discovered in Dask (aka python-dask) through 2021.09.1. 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.


Comment 1 Guilherme de Almeida Suckevicz 2021-10-29 18:31:42 UTC
Created python-dask tracking bugs for this issue:

Affects: fedora-all [bug 2018588]

Comment 2 Product Security DevOps Team 2021-10-29 20:08:12 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Note You need to log in before you can comment on or make changes to this bug.