===[ Introduction ]===
cPanel offers web hosting software that automates the intricate workings of web hosting servers.
cPanel equips server administrators with the necessary tools to provide top-notch hosting to customers on tens of thousands of servers worldwide.
===[ Description ]===
I) Cross Domain Scripting :
But, the script is also accessible from other hosted domains (for example victim.com) :
Here, the hacker’s code is running in another domain’s area and victim.com’s cookies can be read.
A demonstrative video for this vulnerability can be found here :
II) Find existing system users :
Any unauthorized visitor can find valid system users.
POC : If the hacker calls “entropysearch.cgi” script with an invalid username, the error message will be :
“Could not chdir into /.htmltemplates: No such file or directory”
But if the hacker calls “entropysearch.cgi” script with a valid username, the error message will be :
“Could not chdir into /home/victim/.htmltemplates: No such file or directory”
The hacker can make a dictionary attack to find several valid usernames.
III) Find user’s homepage :
If a hacker knows the username, then user’s homepage address can be found.
“Could not chdir into /home2/victim/.htmltemplates: No such file or directory”
This can be useful for further attacks.
===[ Patching ]===
cPanel believes that these are not security vulnerabilities, so the issue already exist.
===[ Timeline ]===
[06/12/2016] – Vendor notified
[06/12/2016] – Vendor verified reception of the report
[09/12/2016] – Vendor responded that these are not security vulnerabilities
[10/12/2016] – POC video sent to vendor explaining the severity of cross domain scripting vulnerability
[06/01/2017] – No response from vendor, so vendor was contacted again
[11/01/2017] – No response from vendor, public disclosure
===[ Credits ]===
Vulnerabilities have been discovered by Omid @ Open Security.
===[ References ]===
Open Security :
Original Advisory :