CVE-2020-28009 · cross-distro fix matrix

CVE-2020-28009: Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: exploitation may be impractical because of the execution time needed to overflow (multiple days).

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-28009 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

exim4→ fixed in4.94.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Debian bookworm

Source: Debian Security Tracker

exim4→ fixed in4.94.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Debian trixie

Source: Debian Security Tracker

exim4→ fixed in4.94.2-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Alpine v3.20

Source: Alpine secdb

exim→ fixed in4.94.2-r0
```
apk update && apk add --upgrade exim
```

Alpine v3.21

Source: Alpine secdb

exim→ fixed in4.94.2-r0
```
apk update && apk add --upgrade exim
```

Alpine edge

Source: Alpine secdb

exim→ fixed in4.94.2-r0
```
apk update && apk add --upgrade exim
```

Alpine v3.18

Source: Alpine secdb

exim→ fixed in4.94.2-r0
```
apk update && apk add --upgrade exim
```

Alpine v3.19

Source: Alpine secdb

exim→ fixed in4.94.2-r0
```
apk update && apk add --upgrade exim
```

Are YOU affected by CVE-2020-28009?

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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