server.cpp in Monopd 0.9.3 allows remote attackers to cause a denial of service (CPU and memory consumption) via a string containing a large number of characters that are escaped when Monopd produces XML output.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25161
http://www.vupen.com/english/advisories/2006/0844
http://www.securityfocus.com/bid/16981
http://www.robertjohnkaper.com/downloads/atlantik/monopd-0.9.3-dosfix.diff