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Category:   Application (Generic)  >   cPanel Vendors:   cPanel, Inc.
cPanel Multiple Flaws Let Remote Users Bypass Security and Execute Arbitrary Code on the Target System
SecurityTracker Alert ID:  1035427
SecurityTracker URL:  http://securitytracker.com/id/1035427
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 29 2016
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 11.50.5.2, 11.52.4.1, 11.54.0.20
Description:   Multiple vulnerabilities were reported in cPanel. A remote authenticated user can gain elevated privileges. A remote authenticated user can obtain files on the target system. A remote user can bypass security controls on the target system. A remote or remote authenticated user user can execute arbitrary code on the target system. A remote user can conduct cross-site scripting attacks. A remote authenticated user can view passwords.

A remote authenticated user may be able to exploit a flaw in a daemon process that has not fully detached from its parent process TTY to gain elevated privileges.

The X3 Reseller Branding Images software does not properly filter HTML code from user-supplied input in the branding package name before displaying the input. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the cPanel software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

The WHM Edit System Mail Preferences API does not properly filter HTML code from user-supplied input in the branding package name before displaying the input. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the cPanel software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote authenticated user can exploit a flaw in the addpop and cpanel-email.pl scripts to view user passwords.

A remote authenticated user can supply a specially crafted MakeText string value to trigger a flaw in user switching to execute arbitrary code with root privileges.

A remote DNS server can return specially crafted nameserver records to trigger a flaw in the creation of domain aliases and execute arbitrary code on the target system.

A remote authenticated user can supply a specially crafted request ending in a static document extension type to bypass security policy.

A remote authenticated user can exploit connections established by a DNS cluster request to bypass two factor authentication in certain situations.

A remote authenticated user may be able to execute include files on the target system.

A remote authenticated user can supply specially crafted multipart form data to trigger a flaw in Cpanel::Form::parseform() and read arbitrary files.

A remote authenticated user can exploit a flaw in the processing of the magic_revision component of a URL to bypass access control lists for AppConfig applications.

A high privileged reseller with a second account can bypass two-factor authentication on the first account.

A remote authenticated user can supply specially crafted FTP username values to bypass FTP cPHulk login attempt limitations.

A remote user can bypass username-based blocking for PRE requests.

A remote authenticated user can bypass account suspension status via FTP.

A remote user can supply specially crafted email username values to bypass POP/IMAP cPHulk login attempt limitations.

A remote authenticated user can send specially crafted authentication credentials to the caldav port on the target system to view portions of arbitrary files.

Impact:   A remote authenticated user can gain elevated privileges on the target system.

A remote or remote authenticated user can execute arbitrary code on the target system.

A remote authenticated user can view files on the target system.

A remote user can bypass security controls on the target system.

A remote user can view certain user passwords on the target system.

A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the cPanel software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

Solution:   The vendor has issued a fix (11.50.5.2, 11.52.4.1, 11.54.0.20).

The vendor's advisory is available at:

https://news.cpanel.com/wp-content/uploads/2016/03/TSR-2016-0002-disclosure.txt

Vendor URL:  news.cpanel.com/wp-content/uploads/2016/03/TSR-2016-0002-disclosure.txt (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


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