fail2ban
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- Author: kikadf
- Vulnerable: 0.8.4-3
- Unaffected: 0.8.13-1arcturus1
Two vulnerabilities were discovered in Fail2ban, a solution to ban hosts that cause multiple authentication errors. When using Fail2ban to monitor Postfix or Cyrus IMAP logs, improper input validation in log parsing could enable a remote attacker to trigger an IP ban on arbitrary addresses, resulting in denial of service.