source: https://www.securityfocus.com/bid/11977/info

Bolthole Filter is prone to a buffer overflow vulnerability. This issue is exposed when the software parses email address data.

If successfully exploited, this vulnerability could result in execution of arbitrary code in the context of the process. 

https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/24982.zip