Bjoern Hoehrmann

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 3.0.9 Thunderbird versions prior to 2.0.0.21 SeaMonkey versions prior to 1.1.15 **Description** The issue allows remote attackers to spoof URLs and conduct phishing attacks by using box-drawing characters not included in the Internationalized Domain Names (IDN) blacklist. This can be demonstrated by homoglyphs of the / (slash) and ? (question mark) characters in a subdomain of a .cn domain name. **Recommendations** For Mozilla Firefox versions prior to 3.0.9, update to version 3.0.9 or later. For Thunderbird versions prior to 2.0.0.21, update to version 2.0.0.21 or later. For SeaMonkey versions prior to 1.1.15, update to version 1.1.15 or later.