CVE-2021-20206 · cross-distro fix matrix

CVE-2021-20206: An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load in the 'type' field in the network configuration, it is possible to use special elements such as "../" separators to reference binaries elsewhere on the system.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-20206 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

golang-github-appc-cni→ fixed in0.8.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y golang-github-appc-cni
```

Debian bookworm

Source: Debian Security Tracker

golang-github-appc-cni→ fixed in0.8.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y golang-github-appc-cni
```

Debian trixie

Source: Debian Security Tracker

golang-github-appc-cni→ fixed in0.8.1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y golang-github-appc-cni
```

Alpine v3.20

Source: Alpine secdb

buildah→ fixed in1.19.4-r0
```
apk update && apk add --upgrade buildah
```

Alpine v3.21

Source: Alpine secdb

buildah→ fixed in1.19.4-r0
```
apk update && apk add --upgrade buildah
```

Alpine edge

Source: Alpine secdb

buildah→ fixed in1.19.4-r0
```
apk update && apk add --upgrade buildah
```

Alpine v3.18

Source: Alpine secdb

buildah→ fixed in1.19.4-r0
```
apk update && apk add --upgrade buildah
```

Alpine v3.19

Source: Alpine secdb

buildah→ fixed in1.19.4-r0
```
apk update && apk add --upgrade buildah
```

Are YOU affected by CVE-2021-20206?

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.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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