CVE-2021-42375 · cross-distro fix matrix

CVE-2021-42375: An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due to the shell mistaking specific characters for reserved characters. This may be used for DoS under rare conditions of filtered command input.

Affects 7 Linux releases across 7 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-42375 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

busybox→ fixed in1:1.35.0-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y busybox
```

Debian trixie

Source: Debian Security Tracker

busybox→ fixed in1:1.35.0-1urgency: unimportant
```
sudo apt-get install --only-upgrade -y busybox
```

Alpine v3.20

Source: Alpine secdb

busybox→ fixed in1.34.0-r0
```
apk update && apk add --upgrade busybox
```

Alpine v3.21

Source: Alpine secdb

busybox→ fixed in1.34.0-r0
```
apk update && apk add --upgrade busybox
```

Alpine edge

Source: Alpine secdb

busybox→ fixed in1.34.0-r0
```
apk update && apk add --upgrade busybox
```

Alpine v3.18

Source: Alpine secdb

busybox→ fixed in1.34.0-r0
```
apk update && apk add --upgrade busybox
```

Alpine v3.19

Source: Alpine secdb

busybox→ fixed in1.34.0-r0
```
apk update && apk add --upgrade busybox
```

Are YOU affected by CVE-2021-42375?

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

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Continuous monitoring beats manual checking

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