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CVE-2021-42343 · cross-distro fix matrix

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 externa

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-42343 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

  • dask.distributed→ fixed in2021.01.0+ds.1-2.1+deb11u1urgency: not yet assigned
    sudo apt-get install --only-upgrade -y dask.distributed

Debian bookworm

Source: Debian Security Tracker

  • dask.distributed→ fixed in2021.09.1+ds.1-2urgency: not yet assigned
    sudo apt-get install --only-upgrade -y dask.distributed

Debian trixie

Source: Debian Security Tracker

  • dask.distributed→ fixed in2021.09.1+ds.1-2urgency: not yet assigned
    sudo apt-get install --only-upgrade -y dask.distributed

Alpine v3.20

Source: Alpine secdb

  • py3-dask→ fixed in2022.2.0-r0
    apk update && apk add --upgrade py3-dask

Alpine v3.21

Source: Alpine secdb

  • py3-dask→ fixed in2022.2.0-r0
    apk update && apk add --upgrade py3-dask

Alpine edge

Source: Alpine secdb

  • py3-dask→ fixed in2022.2.0-r0
    apk update && apk add --upgrade py3-dask

Alpine v3.18

Source: Alpine secdb

  • py3-dask→ fixed in2022.2.0-r0
    apk update && apk add --upgrade py3-dask

Alpine v3.19

Source: Alpine secdb

  • py3-dask→ fixed in2022.2.0-r0
    apk update && apk add --upgrade py3-dask
Are YOU affected by CVE-2021-42343?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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