| Name | CVE-2021-42343 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dask.distributed (PTS) | buster | 1.25.0+ds.1-1 | vulnerable |
| bullseye | 2021.01.0+ds.1-2.1+deb11u1 | fixed |
| bookworm | 2022.12.1+ds.1-3 | fixed |
| sid, trixie | 2023.12.1+ds-4 | fixed |
The information below is based on the following data on fixed versions.
Notes
[buster] - dask.distributed <ignored> (Minor issue; unreproducible with <2.0)
https://github.com/dask/distributed/pull/5427
https://github.com/dask/distributed/security/advisories/GHSA-hwqr-f3v9-hwxr
Likely introduced in https://github.com/quasiben/distributed/commit/fd31ecca8017bae845a73d468de0376c02363fab (2.0.0)