CVE-2021-44224 · cross-distro fix matrix

CVE-2021-44224: A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-44224 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

apache2→ fixed in2.4.52-1~deb11u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apache2
```

Debian bookworm

Source: Debian Security Tracker

apache2→ fixed in2.4.52-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apache2
```

Debian trixie

Source: Debian Security Tracker

apache2→ fixed in2.4.52-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y apache2
```

Alpine v3.20

Source: Alpine secdb

apache2→ fixed in2.4.52-r0
```
apk update && apk add --upgrade apache2
```

Alpine v3.21

Source: Alpine secdb

apache2→ fixed in2.4.52-r0
```
apk update && apk add --upgrade apache2
```

Alpine edge

Source: Alpine secdb

apache2→ fixed in2.4.52-r0
```
apk update && apk add --upgrade apache2
```

Alpine v3.18

Source: Alpine secdb

apache2→ fixed in2.4.52-r0
```
apk update && apk add --upgrade apache2
```

Alpine v3.19

Source: Alpine secdb

apache2→ fixed in2.4.52-r0
```
apk update && apk add --upgrade apache2
```

Are YOU affected by CVE-2021-44224?

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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