Steven Hiscocks

**Name of the Vulnerable Software and Affected Versions** Fail2ban versions prior to 0.8.11 **Description** The issue allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression in the postfix filter configuration file. **Recommendations** For versions prior to 0.8.11, update to version 0.8.11 or later to resolve the issue.

**Name of the Vulnerable Software and Affected Versions** Fail2ban versions prior to 0.8.11 **Description** The issue arises from a crafted e-mail address that matches an improperly designed regular expression in the cyrus-imap filter, allowing remote attackers to trigger the blocking of an arbitrary IP address. **Recommendations** For versions prior to 0.8.11, update to version 0.8.11 or later to resolve the issue.