CVE-2021-21439 · cross-distro fix matrix

CVE-2021-21439: DoS attack can be performed when an email contains specially designed URL in the body. It can lead to the high CPU usage and cause low quality of service, or in extreme case bring the system to a halt. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTR

Affects 1 Linux release across 1 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-21439 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

otrs2→ fixed in6.0.32-5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y otrs2
```

Are YOU affected by CVE-2021-21439?

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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