CVE-2011-4407 · cross-distro fix matrix

CVE-2011-4407: ppa.py in Software Properties before 0.81.13.3 does not validate the server certificate when downloading PPA GPG key fingerprints, which allows man-in-the-middle (MITM) attackers to spoof GPG keys for a package repository.

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

Fix per ecosystem

Each block below is a distro release where CVE-2011-4407 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

software-properties→ fixed in0.76.7debian2+nmu2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y software-properties
```

Debian bookworm

Source: Debian Security Tracker

software-properties→ fixed in0.76.7debian2+nmu2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y software-properties
```

Are YOU affected by CVE-2011-4407?

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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