CVE-2019-16254 · cross-distro fix matrix

CVE-2019-16254: Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. N

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

Fix per ecosystem

Each block below is a distro release where CVE-2019-16254 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

jruby→ fixed in9.3.9.0+ds-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y jruby
```

Debian trixie

Source: Debian Security Tracker

jruby→ fixed in9.3.9.0+ds-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y jruby
```

Alpine v3.20

Source: Alpine secdb

ruby→ fixed in2.6.5-r0
```
apk update && apk add --upgrade ruby
```

Alpine v3.21

Source: Alpine secdb

ruby→ fixed in2.6.5-r0
```
apk update && apk add --upgrade ruby
```

Alpine edge

Source: Alpine secdb

ruby→ fixed in2.6.5-r0
```
apk update && apk add --upgrade ruby
```

Alpine v3.18

Source: Alpine secdb

ruby→ fixed in2.6.5-r0
```
apk update && apk add --upgrade ruby
```

Alpine v3.19

Source: Alpine secdb

ruby→ fixed in2.6.5-r0
```
apk update && apk add --upgrade ruby
```

Are YOU affected by CVE-2019-16254?

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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