A security vulnerability exists in specific versions of ZoneAlarm,ZoneAlarm Pro, ZoneAlarm Plus and the Zone Labs Integrity client. This vulnerability is caused by an unchecked buffer in Simple Mail Transfer Protocol (SMTP) processing which could lead to a buffer overflow. In order to exploit the vulnerability without user assistance, the target system must be operating as an SMTP server.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32720/ZL04-008.txt
Source: https://packetstormsecurity.com/files/32720/ZL04-008.txt.html