It indicates an attacker tried to exploit an Integer Signedness vulnerability in the POP client for Mirabilis ICQ Pro 2003. Multiple vulnerabilities exist in Mirabilis ICQ Pro 2003 that could lead to remote code execution because of integer signedness errors in the Subject or Date fields in the POP client.
Multiple versions on multiple different platforms. Please see the following link for more information:http://www.securityfocus.com/bid/7462
Compromise of the affected system.
Apply appropriate patch from the vendor or Upgrade to non-vulnerable version if available.