An off-by-one condition exists in the POP3 handler code present in popclient 3.0b6. By crafting a malicious email a remote attacker may cause a denial of service against users of this software.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33666/popclient30b6.txt
Source: https://packetstormsecurity.com/files/33666/popclient30b6.txt.html