Debian/fail2ban: unknown

fail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP a

Action: Upgrade fail2ban to 0.8.0-4 or later.

Affected

Fixed versions

Sources

• osv: DEBIAN-CVE-2007-4321#Debian:13/fail2ban
• https://security-tracker.debian.org/tracker/CVE-2007-4321

published 2007-08-14T00:17:00Z · modified 2026-10-21T17:47:31.880458336Z · JSON