CVE-2012-5642 · cross-distro fix matrix

CVE-2012-5642: server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow remote attackers to trigger unsafe behavior in a custom action file via unspecified symbols in this content.

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

Fix per ecosystem

Each block below is a distro release where CVE-2012-5642 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

fail2ban→ fixed in0.8.6-3wheezy1urgency: low

sudo apt-get install --only-upgrade -y fail2ban

Debian bookworm

Source: Debian Security Tracker

fail2ban→ fixed in0.8.6-3wheezy1urgency: low

sudo apt-get install --only-upgrade -y fail2ban

Debian trixie

Source: Debian Security Tracker

fail2ban→ fixed in0.8.6-3wheezy1urgency: low

sudo apt-get install --only-upgrade -y fail2ban

Are YOU affected by CVE-2012-5642?

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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