Following the trend of these days I played (locally) with one of the latest release of LOIC (Low Orbit Ion Cannon DDOS Tool). Inserting a long (not so) string on the topic of a C&C irc channel, there seems to be a memory corruption condition.
The screen shot above show a crafted topic that trigger the issue. The impacted tested released is the 18.104.22.168. A few more details related to the .NET exception:
Some important notes: I saw on twitter that someone has retweet this post adding "remote code execution". I never speak about a "remote code execution" condition for this issue.
Anyway IMHO this issue could be insert in the counter measures list for this kind of threats. Act from a client side perspective some times maybe useful.