CVE-2021-28374 · cross-distro fix matrix

CVE-2021-28374: The Debian courier-authlib package before 0.71.1-2 for Courier Authentication Library creates a /run/courier/authdaemon directory with weak permissions, allowing an attacker to read user information. This may include a cleartext password in some configurations. In general, it includes the user's exi

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-28374 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

courier-authlib→ fixed in0.71.1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y courier-authlib
```

Debian bookworm

Source: Debian Security Tracker

courier-authlib→ fixed in0.71.1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y courier-authlib
```

Debian trixie

Source: Debian Security Tracker

courier-authlib→ fixed in0.71.1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y courier-authlib
```

Are YOU affected by CVE-2021-28374?

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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