References https://www.juniper.net/us/en/threatlabs/ips-signatures/detail.HTTP:MISC:ZOPE-CMD-RCE.html https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=26224 https://advisories.checkpoint.com/defense/advisories/public/2014/cpai-2014-1947.html/ https://www.exploit-db.com/exploits/18262 https://www.anquanke.com/post/id/229611 https://zhuanlan.zhihu.com/p/685327018