CVE-2019-20444 · cross-distro fix matrix

CVE-2019-20444: HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an "invalid fold."

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2019-20444 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

netty→ fixed in1:4.1.45-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netty
```

Debian bookworm

Source: Debian Security Tracker

netty→ fixed in1:4.1.45-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netty
```

Debian trixie

Source: Debian Security Tracker

netty→ fixed in1:4.1.45-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y netty
```

Are YOU affected by CVE-2019-20444?

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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