Found at rec-sec.com:

As of June 1st, the Chinese government demands every personal computer in China to install or be sold with Green Dam Youth Escort Censorware program. Three security researchers – Scott Wolchok, Randy Yao, and J. Alex Halderman from University of Michigan have released an analysis of the Green Dam Censorware system, disclosing multiple vulnerabilities and weaknesses in it. You can read the whole story in the ZDNet Zero Day blog.

The vendor, Jinhui Computer System Engineering Ltd., already patched the vulnerabilities but you can still find vulnerable installations with Google if you want to test it.

One of the vulnerabilities disclosed in the security analysis is a remotely exploitable stack-based buffer overflow vulnerability in the way Green Dam process overly long URLs (OSVDB 55126). seer[N.N.U] posted a simple exploit for this vulnerability on milw0rm.

According to the latest Microsoft Security Intelligence Report, China is the world leading country in Malware distribution so I guess they deserve some pwning :P