This article I maked explains on how to defeat the new protection against exploiting in Windows XP sp2 (and how to do it also on a linux system), It explains on how to bypass the canaries (That micro$oft stole from the Linux world) on the stack and what to do if you have a cpu which support non executbale stacks (the nx flag in the new generation 64 bit processors)

http://junior.madoka.be/cvh/Howto.zip

This article will also be updated because there is a little mistake in the exploit for yahoopops (made by Anarchiste) which doesn't point correcly to the Winexec api adress for excuting commands through a non-executable stack on a Windows Xp sp2 system with a 64 bit processor with the nx flag activated, you can quickly start the exploit in a debugger and point correctly to the winexec adress so it will work, I will make a new thread when I have my article updated (when Anarchiste have sent me a new and fixed version of the exploit.)

Have fun reading

Not a lot of response to this now, but I'm sure it will rise as more and more people find themselves in this situation.