phpLinks mail() abuse Vulnerability ( By Mindwarper :: mindwarper@hush.com :: )

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Vendor Information:
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Homepage : http://www.destiney.com
Vendor : Could not be informed (Host not found)
Mailed advisory: 09/01/20
Vender Response : None
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Affected Versions:
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All 2.X versions


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Vulnerability:
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|PhpLinks has an email_confirmation file located in the /include/ directory which is used to
notify the users that they have signed up correctly. An exploit has been discovered in the
file email_confirmation.php which works as following: An attacker may call this file directly
(when it should really be included) and hijack the variables in such way that he/she may abuse
the mail() function. By using the example bellow, any person can use the server's smtp service.
without permission.

http:/victim.com/phplinks/include/email_confirmation.php?UserName=anyone&Email=targe t@mail.com&
site_title=test_&email_confirmation_2=Hello&owner_ name=bu&owner_email=I_Own_j0u@victim.com


Side-note: An attacker may also use this file for XSS attack on the server.

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Solution:
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Please check the vendor's website for new patches.

As a temporary solution, create a .htaccess file that contains 'Deny from all'.
Place it in the /include/ directory and that should block remote users from accessing it.



- Mindwarper



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