Trend Maximum Security 2019 Unquoted Search Path

=====[ Tempest Security Intelligence - ADV-02/2019 ]==========================

Trend Maximum Security 2019
Author: Silton Santos
Tempest Security Intelligence - Recife, Pernambuco - Brazil

=====[ Table of Contents]=====================================================

* Overview
* Detailed description
* Timeline of disclosure
* Thanks & Acknowledgements
* References

=====[ Vulnerability Information]=============================================

* Class: Unquoted Search Path or Element [CWE-428][1]
* CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
* CVE-2019-14685

=====[ Overview]==============================================================

* System affected : Trend Maximum Security 2019.[2]
* Impact : An user could obtain SYSTEM privileges.

=====[ Detailed description]==================================================

This application provide a unquoted path in the parameter lpApplicationName 
of the function CreateProcessW during process create PwmConsole.exe --- 
which is triggered from the feature PC Health Checkup.

If an attacker has write permissions to C:\ or C:\Program Files\, it could 
deliver an arbitrary executable named  Program.exe or Trend.exe which would 
be executed by the coreServiceShell process.

coreServiceShell is a privileged process that will run Program.exe with same privilege.

More Details: https://medium.com/sidechannel-br/vulnerabilidade-no-trend-micro-maximum-security-2019-permite-a-escalao-de-privilgios-no-windows-471403d53b68


=====[ Timeline of disclosure]===============================================

* 24/04/2019 - Responsible disclosure started with Trend Micro;
* 25/04/2019 - Analysis of the issue is started;
* 10/05/2019 - Trend Micro requires more information about the PoC;
* 22/05/2019 - Vendor developed and sent patch and asked for an analysis of the fix;
* 28/05/2019 - Trend Micro thanked for the help and mentioned the process os aknowledgement 
(which includes the CVE reservation and Security Advisory post in in their webpage);
* 31/07/2019 - Vendor issued a new patch and sent it to be analysed;
* 13/08/2019 - CVE-2019-14685 was reserved, and a link to security advisory was provided.


=====[ Thanks & Acknowledgements]============================================

- Tempest Security Intelligence [3]

=====[ References ]===========================================================

[1] https://cwe.mitre.org/data/definitions/428.html

[2] https://esupport.trendmicro.com/en-us/home/pages/technical-support/1123420.aspx

[3] http://www.tempest.com.br

=====[ EOF ]====================================================================

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