CVE-2009-4212 · cross-distro fix matrix

CVE-2009-4212: Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5 (aka krb5) 1.3 through 1.6.3, and 1.7 before 1.7.1, allow remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by providing ciphertext wi

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

Fix per ecosystem

Each block below is a distro release where CVE-2009-4212 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

krb5→ fixed in1.8+dfsg~alpha1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y krb5
```

Debian bookworm

Source: Debian Security Tracker

krb5→ fixed in1.8+dfsg~alpha1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y krb5
```

Debian trixie

Source: Debian Security Tracker

krb5→ fixed in1.8+dfsg~alpha1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y krb5
```

Are YOU affected by CVE-2009-4212?

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

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