CVE-2019-20637 · cross-distro fix matrix

CVE-2019-20637: An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connecti

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

Fix per ecosystem

Each block below is a distro release where CVE-2019-20637 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

varnish→ fixed in6.4.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y varnish
```

Debian bookworm

Source: Debian Security Tracker

varnish→ fixed in6.4.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y varnish
```

Debian trixie

Source: Debian Security Tracker

varnish→ fixed in6.4.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y varnish
```

Are YOU affected by CVE-2019-20637?

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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