eEye Security Advisory – Zonelabs Pro/Plus/Integrity versions 4.0 and above are susceptible to a stack based buffer overflow within vsmon.exe that can be exploited to execute code with the context of the SYSTEM account. The vulnerability exists within the component responsible for processing the RCPT TO command argument.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32724/eEye.Zonelabs.txt
Source: https://packetstormsecurity.com/files/32724/eEye.Zonelabs.txt.html