exploit the possibilities

cPanel Cross Domain Scripting / Information Disclosure

cPanel Cross Domain Scripting / Information Disclosure
Posted Jan 13, 2017
Authored by Omid

cPanel suffers from cross domain scripting, user enumeration, and information disclosure vulnerabilities.

tags | exploit, vulnerability, xss, info disclosure
MD5 | 30b4fc563c2e20e28b1d34d727cad30d

cPanel Cross Domain Scripting / Information Disclosure

Change Mirror Download
===[ 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 :
A local user can run JavaScript code in other user's domain and access
cookies and compromise the victim website.
POC : User "hacker" makes ".htmltemplates" directory in hacker's homepage
(/home/hacker/.htmltemplates/) and makes "exploit" file containing
JavaScript. Now this script can be called from hacker's domain
(hacker.com) :
http://hacker.com/cgi-sys/entropysearch.cgi?user=hacker&template=exploit

But, the script is also accessible from other hosted domains (for example
victim.com) :
http://victim.com/cgi-sys/entropysearch.cgi?user=hacker&template=exploit

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 :
http://opensecurity.ca/media/cpanel-cross-domain-scripting.mp4

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"
http://1.2.3.4/cgi-sys/entropysearch.cgi?user=notexist

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"
http://1.2.3.4/cgi-sys/entropysearch.cgi?user=victim

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.
POC :
http://domain.com/cgi-sys/entropysearch.cgi?user=victim :
"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 :
http://opensecurity.ca/

Original Advisory :
http://opensecurity.ca/2016/12/multiple-vulnerabilities-in-cpanel/

POC Video :
http://opensecurity.ca/media/cpanel-cross-domain-scripting.mp4

Login or Register to add favorites

File Archive:

June 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jun 1st
    10 Files
  • 2
    Jun 2nd
    16 Files
  • 3
    Jun 3rd
    15 Files
  • 4
    Jun 4th
    0 Files
  • 5
    Jun 5th
    0 Files
  • 6
    Jun 6th
    0 Files
  • 7
    Jun 7th
    0 Files
  • 8
    Jun 8th
    0 Files
  • 9
    Jun 9th
    0 Files
  • 10
    Jun 10th
    0 Files
  • 11
    Jun 11th
    0 Files
  • 12
    Jun 12th
    0 Files
  • 13
    Jun 13th
    0 Files
  • 14
    Jun 14th
    0 Files
  • 15
    Jun 15th
    0 Files
  • 16
    Jun 16th
    0 Files
  • 17
    Jun 17th
    0 Files
  • 18
    Jun 18th
    0 Files
  • 19
    Jun 19th
    0 Files
  • 20
    Jun 20th
    0 Files
  • 21
    Jun 21st
    0 Files
  • 22
    Jun 22nd
    0 Files
  • 23
    Jun 23rd
    0 Files
  • 24
    Jun 24th
    0 Files
  • 25
    Jun 25th
    0 Files
  • 26
    Jun 26th
    0 Files
  • 27
    Jun 27th
    0 Files
  • 28
    Jun 28th
    0 Files
  • 29
    Jun 29th
    0 Files
  • 30
    Jun 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close