Adiscon WinSyslog 4.21 SP1 allows remote attackers to cause a denial of service (CPU consumption) via a long syslog message.
https://exchange.xforce.ibmcloud.com/vulnerabilities/13428
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-1508
http://www.securityfocus.com/bid/8821