CVE-2021-31866 · cross-distro fix matrix

CVE-2021-31866: Redmine before 4.0.9 and 4.1.x before 4.1.3 allows an attacker to learn the values of internal authentication keys by observing timing differences in string comparison operations within SysController and MailHandlerController.

Affects 2 Linux releases across 2 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-31866 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

redmine→ fixed in5.0.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redmine
```

Debian trixie

Source: Debian Security Tracker

redmine→ fixed in5.0.0-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redmine
```

Are YOU affected by CVE-2021-31866?

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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