大神们帮忙看看这个插件存在后门吗 如果存在怎么去掉

Question

大神们帮忙看看有没有插件后门
代码1：

<!--{eval}-->if(!strstr($_G['style']['copyright'],authcode('e4a9Q0e95CExTvMQKqNey9tFGZ8BapVec9X5BnIK+cM6','DECODE','template')) and !strstr($_G['siteurl'],authcode('338dd6B5jLj0Ghep72g/GZR5y+O0e2xLOP3HluXMG+t1/+xbAks','DECODE','template')) and !strstr($_G['siteurl'],authcode('983aznO3uLeJ9LK65jRgKo4gJJru+QIbIMLC/niebcuPYo/F4E8','DECODE','template'))){exit;}<!--{/eval}--><!--{loop $huifu $vh}-->

$huser[username]:<!--{eval require_once libfile('function/discuzcode');echo discuzcode($vh[message]);}-->

<!--{eval}-->if(strstr($_G['style']['copyright'],base64_decode('bW9'.'xd'.'Tg'.'=')) and !strstr($_G['siteurl'],base64_decode('M'.'TI3'.'LjAu'.'MC4x')) and !strstr($_G['siteurl'],base64_decode('bG9'.'jYWxo'.'b3N'.'0'))){ echo '点击查看源码哥的如何传播后门的';exit;}<!--{/eval}--><!--{if $i>3}-->

{$n5app['lang']['pyqcksy']}<!--{eval echo $thread[replies]-$i-1;}-->{$n5app['lang']['pyqcksyh']}

+-------------------------------------------------------------

代码2：

<!--{if $n5app['dbdhssl'] == 1}--><!--{/if}-->
{$n5app['lang']['qjwode']}<!--{if $_G[member][newprompt]}--><!--{/if}--><!--{eval}-->if(strstr($_G['style']['copyright'],base64_decode('bW9'.'xd'.'Tg'.'=')) and !strstr($_G['siteurl'],base64_decode('M'.'TI3'.'LjAu'.'MC4x')) and !strstr($_G['siteurl'],base64_decode('bG9'.'jYWxo'.'b3N'.'0'))){ echo '点击查看源码哥的如何传播后门的';exit;}<!--{/eval}--><!--{if $_G[member][newpm]}--><!--{/if}-->

Answer 1

http://www.zuimc.com/thread-51788-1-1.html