CVE-2006-6302: FAIL2BAN

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

fail2ban 0.7.4 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 addresses to the sshd log file, as demonstrated by logging in via ssh with a login name containing certain strings with an IP address.

Affected products

• FAIL2BAN FAIL2BAN: up to and including 0.7.4

Published 2006-12-06. Last modified 2026-06-16.